Add Temporal tests

This copies over the tests that previously existed in the
tc39/proposal-temporal repository.

For context, see thread starting at:
https://github.com/tc39/test262/issues/3002#issuecomment-926234480

In service of https://github.com/tc39/test262/issues/3002

test/built-ins/Temporal/Calendar/builtin.js

@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar
+description: Tests that Temporal.Calendar meets the requirements for built-in objects
+info: |
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar),
+  Function.prototype, "prototype");
+
+assert.sameValue(typeof Temporal.Calendar.prototype,
+  "object", "prototype property");

test/built-ins/Temporal/Calendar/constructor.js

@@ -0,0 +1,12 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar
+description: Temporal.Calendar constructor cannot be called as a function
+info: |
+    1. If NewTarget is undefined, throw a TypeError exception.
+features: [Temporal]
+---*/
+
+assert.throws(TypeError, () => Temporal.Calendar());

test/built-ins/Temporal/Calendar/from/builtin.js

@@ -0,0 +1,30 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Tests that Temporal.Calendar.from meets the requirements for built-in objects
+info: |
+    Built-in functions that are not constructors do not have a "prototype" property unless
+    otherwise specified in the description of a particular function.
+
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar.from),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar.from),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar.from),
+  Function.prototype, "prototype");
+
+assert.sameValue(Temporal.Calendar.from.hasOwnProperty("prototype"),
+  false, "prototype property");

test/built-ins/Temporal/Calendar/from/calendar-object-invalid.js

@@ -0,0 +1,11 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Converting objects to Temporal.Calendar
+features: [Temporal]
+---*/
+
+assert.throws(RangeError, () => Temporal.Calendar.from({ calendar: "local" }));
+assert.throws(RangeError, () => Temporal.Calendar.from({ calendar: { calendar: "iso8601" } }));

test/built-ins/Temporal/Calendar/from/calendar-object-operations.js

@@ -0,0 +1,39 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Converting objects to Temporal.Calendar
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const expected = [
+  "has outer.calendar",
+  "get outer.calendar",
+  "has inner.calendar",
+  "get inner.toString",
+  "call inner.toString",
+];
+const actual = [];
+const calendar = new Proxy({}, {
+  has(t, p) {
+    actual.push(`has outer.${p}`);
+    return true;
+  },
+  get(t, p) {
+    actual.push(`get outer.${p}`);
+    return new Proxy(TemporalHelpers.toPrimitiveObserver(actual, "iso8601", "inner"), {
+      has(t, p) {
+        actual.push(`has inner.${p}`);
+        return true;
+      },
+      get(t, p) {
+        return t[p];
+      },
+    });
+  },
+});
+const result = Temporal.Calendar.from(calendar);
+assert.sameValue(result.id, "iso8601");
+assert.compareArray(actual, expected);

test/built-ins/Temporal/Calendar/from/calendar-object.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Converting objects to Temporal.Calendar
+features: [Temporal]
+---*/
+
+const cal = new Temporal.Calendar("iso8601");
+const calFromObject = Temporal.Calendar.from({ calendar: cal });
+assert(calFromObject instanceof Temporal.Calendar);
+assert.sameValue(calFromObject.id, "iso8601");
+
+const calFromString = Temporal.Calendar.from({ calendar: "iso8601" });
+assert(calFromString instanceof Temporal.Calendar);
+assert.sameValue(calFromString.id, "iso8601");
+
+const custom = { id: "custom-calendar" };
+assert.sameValue(Temporal.Calendar.from({ calendar: custom }), custom);
+assert.sameValue(Temporal.Calendar.from(custom), custom);

test/built-ins/Temporal/Calendar/from/calendar-string-builtin.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Calendar.from should support iso8601.
+features: [Temporal]
+---*/
+
+const tests = [
+  "iso8601",
+  "1994-11-05T08:15:30-05:00",
+];
+
+for (const item of tests) {
+  const calendar = Temporal.Calendar.from(item);
+  assert(calendar instanceof Temporal.Calendar);
+  assert.sameValue(calendar.id, "iso8601");
+}

test/built-ins/Temporal/Calendar/from/calendar-string-not-builtin.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: from() throws if the argument is not a built-in calendar name.
+features: [Temporal]
+---*/
+
+const tests = [
+  "local",
+  "iso-8601",
+  "[u-ca=iso8601]",
+  "invalid-calendar",
+];
+
+for (const item of tests) {
+  assert.throws(RangeError, () => Temporal.Calendar.from(item));
+}

test/built-ins/Temporal/Calendar/from/calendar-temporal-object.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Fast path for converting other Temporal objects to Temporal.Calendar by reading internal slots
+info: |
+    sec-temporal.calendar.from step 1:
+      1. Return ? ToTemporalCalendar(_item_).
+    sec-temporal-totemporalcalendar step 1.a:
+      a. If _temporalCalendarLike_ has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
+        i. Return _temporalCalendarLike_.[[Calendar]].
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkToTemporalCalendarFastPath((temporalObject, calendar) => {
+  const newCalendar = Temporal.Calendar.from(temporalObject);
+  assert.sameValue(newCalendar, calendar, "calendar object retrieved from internal slot");
+});

test/built-ins/Temporal/Calendar/from/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Temporal.Calendar.from.length is 1
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.from, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/from/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Temporal.Calendar.from.name is "from"
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.from, "name", {
+  value: "from",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/from/not-a-constructor.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: Temporal.Calendar.from does not implement [[Construct]], is not new-able
+info: |
+    Built-in function objects that are not identified as constructors do not implement the
+    [[Construct]] internal method unless otherwise specified in the description of a particular
+    function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Temporal]
+---*/
+
+assert.throws(TypeError, () => {
+  new Temporal.Calendar.from();
+}, "Calling as constructor");
+
+assert.sameValue(isConstructor(Temporal.Calendar.from), false,
+  "isConstructor(Temporal.Calendar.from)");

test/built-ins/Temporal/Calendar/from/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: The "from" property of Temporal.Calendar
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar.from,
+  "function",
+  "`typeof Calendar.from` is `function`"
+);
+
+verifyProperty(Temporal.Calendar, "from", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/from/subclassing-ignored.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.from
+description: The receiver is never called when calling from()
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkSubclassingIgnoredStatic(
+  Temporal.Calendar,
+  "from",
+  ["iso8601"],
+  (result) => {
+    assert.sameValue(result.id, "iso8601", "id property of result");
+    assert.sameValue(result.toString(), "iso8601", "toString() of result");
+  },
+);

test/built-ins/Temporal/Calendar/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar
+description: Temporal.Calendar.length is 1
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/missing-arguments.js

@@ -0,0 +1,11 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar
+description: RangeError thrown when constructor invoked with no argument
+features: [Temporal]
+---*/
+
+assert.throws(RangeError, () => new Temporal.Calendar());
+assert.throws(RangeError, () => new Temporal.Calendar(undefined));

test/built-ins/Temporal/Calendar/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar
+description: Temporal.Calendar.name is "Calendar"
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar, "name", {
+  value: "Calendar",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar
+description: The "Calendar" property of Temporal
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar,
+  "function",
+  "`typeof Calendar` is `function`"
+);
+
+verifyProperty(Temporal, "Calendar", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/argument-plaindatetime.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Fast path for converting Temporal.PlainDateTime to Temporal.PlainDate by reading internal slots
+info: |
+    sec-temporal.calendar.prototype.dateadd step 4:
+      4. Set _date_ to ? ToTemporalDate(_date_).
+    sec-temporal-totemporaldate step 2.b:
+      b. If _item_ has an [[InitializedTemporalDateTime]] internal slot, then
+        i. Return ! CreateTemporalDate(_item_.[[ISOYear]], _item_.[[ISOMonth]], _item_.[[ISODay]], _item_.[[Calendar]]).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkPlainDateTimeConversionFastPath((datetime) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  const duration = new Temporal.Duration(0, 1);
+  const result = calendar.dateAdd(datetime, duration);
+  TemporalHelpers.assertPlainDate(result, 2000, 6, "M06", 2);
+  assert.sameValue(result.hour, undefined, "instance of PlainDate returned, not PlainDateTime");
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-non-integer.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: RangeError thrown if time zone reports an offset that is not an integer number of nanoseconds
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[3600_000_000_000.5, NaN, -Infinity, Infinity].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const duration = new Temporal.Duration(1);
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.dateAdd(datetime, duration));
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-out-of-range.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: RangeError thrown if time zone reports an offset that is out of range
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[-86400_000_000_001, 86400_000_000_001].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const duration = new Temporal.Duration(1);
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.dateAdd(datetime, duration));
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-wrong-type.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: TypeError thrown if time zone reports an offset that is not a Number
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[
+  undefined,
+  null,
+  true,
+  "+01:00",
+  Symbol(),
+  3600_000_000_000n,
+  {},
+  { valueOf() { return 3600_000_000_000; } },
+].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const duration = new Temporal.Duration(1);
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(TypeError, () => calendar.dateAdd(datetime, duration));
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/balance-smaller-units.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Durations with units smaller than days are balanced before adding
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+const date = new Temporal.PlainDate(2000, 5, 2, calendar);
+const duration = new Temporal.Duration(0, 0, 0, 1, 24, 1440, 86400, 86400_000, 86400_000_000, 86400_000_000_000);
+
+const result = calendar.dateAdd(date, duration);
+TemporalHelpers.assertPlainDate(result, 2000, 5, "M05", 9, "units smaller than days are balanced");
+
+const resultString = calendar.dateAdd(date, "P1DT24H1440M86400S");
+TemporalHelpers.assertPlainDate(resultString, 2000, 5, "M05", 6, "units smaller than days are balanced");
+
+const resultPropBag = calendar.dateAdd(date, { days: 1, hours: 24, minutes: 1440, seconds: 86400, milliseconds: 86400_000, microseconds: 86400_000_000, nanoseconds: 86400_000_000_000 });
+TemporalHelpers.assertPlainDate(resultPropBag, 2000, 5, "M05", 9, "units smaller than days are balanced");

test/built-ins/Temporal/Calendar/prototype/dateAdd/basic.js

@@ -0,0 +1,50 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Basic tests for dateAdd().
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const iso = Temporal.Calendar.from("iso8601");
+const date = Temporal.PlainDate.from("1994-11-06");
+const positiveDuration = Temporal.Duration.from({ months: 1, weeks: 1 });
+const negativeDuration = Temporal.Duration.from({ months: -1, weeks: -1 });
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd(Temporal.PlainDateTime.from("1994-11-06T08:15:30"), positiveDuration, {}),
+  1994, 12, "M12", 13, "date: PlainDateTime");
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd({ year: 1994, month: 11, day: 6 }, positiveDuration, {}),
+  1994, 12, "M12", 13, "date: property bag");
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd("1994-11-06", positiveDuration, {}),
+  1994, 12, "M12", 13, "date: string");
+
+assert.throws(TypeError, () => iso.dateAdd({ month: 11 }, positiveDuration, {}), "date: missing property");
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd(date, { months: 1, weeks: 1 }, {}),
+  1994, 12, "M12", 13, "duration: property bag");
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd(date, "P1M1W", {}),
+  1994, 12, "M12", 13, "duration: string");
+
+assert.throws(TypeError, () => iso.dateAdd(date, { month: 1 }, {}), "duration: missing property");
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd(Temporal.PlainDateTime.from("1994-11-06T08:15:30"), negativeDuration, {}),
+  1994, 9, "M09", 29, "date: PlainDateTime, negative duration");
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd({ year: 1994, month: 11, day: 6 }, negativeDuration, {}),
+  1994, 9, "M09", 29, "date: property bag, negative duration");
+
+TemporalHelpers.assertPlainDate(
+  iso.dateAdd("1994-11-06", negativeDuration, {}),
+  1994, 9, "M09", 29, "date: string, negative duration");

test/built-ins/Temporal/Calendar/prototype/dateAdd/builtin.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: >
+    Tests that Temporal.Calendar.prototype.dateAdd
+    meets the requirements for built-in objects defined by the
+    introduction of chapter 17 of the ECMAScript Language Specification.
+info: |
+    Built-in functions that are not constructors do not have a "prototype" property unless
+    otherwise specified in the description of a particular function.
+
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar.prototype.dateAdd),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar.prototype.dateAdd),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar.prototype.dateAdd),
+  Function.prototype, "prototype");
+
+assert.sameValue(Temporal.Calendar.prototype.dateAdd.hasOwnProperty("prototype"),
+  false, "prototype property");

test/built-ins/Temporal/Calendar/prototype/dateAdd/calendar-fields-iterable.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Verify the result of calendar.fields() is treated correctly.
+info: |
+    sec-temporal.calendar.prototype.dateadd step 4:
+      4. Set _date_ to ? ToTemporalDate(_date_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _fieldNames_ be ? CalendarFields(_calendar_, « *"day"*, *"month"*, *"monthCode"*, *"year"* »).
+    sec-temporal-calendarfields step 4:
+      4. Let _result_ be ? IterableToListOfType(_fieldsArray_, « String »).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const expected = [
+  "day",
+  "month",
+  "monthCode",
+  "year",
+];
+
+const duration = new Temporal.Duration(0, 1);
+const calendar1 = TemporalHelpers.calendarFieldsIterable();
+const calendar2 = TemporalHelpers.calendarFieldsIterable();
+calendar1.dateAdd({ year: 2000, month: 5, day: 2, calendar: calendar2 }, duration);
+
+assert.sameValue(calendar1.fieldsCallCount, 0, "fields() method not called");
+assert.sameValue(calendar2.fieldsCallCount, 1, "fields() method called once");
+assert.compareArray(calendar2.fieldsCalledWith[0], expected, "fields() method called with correct args");
+assert(calendar2.iteratorExhausted[0], "iterated through the whole iterable");

test/built-ins/Temporal/Calendar/prototype/dateAdd/calendar-temporal-object.js

@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Fast path for converting other Temporal objects to Temporal.Calendar by reading internal slots
+info: |
+    sec-temporal.calendar.prototype.dateadd step 4:
+      4. Set _date_ to ? ToTemporalDate(_date_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _calendar_ be ? GetTemporalCalendarWithISODefault(_item_).
+    sec-temporal-gettemporalcalendarwithisodefault step 2:
+      2. Return ? ToTemporalCalendarWithISODefault(_calendar_).
+    sec-temporal-totemporalcalendarwithisodefault step 2:
+      3. Return ? ToTemporalCalendar(_temporalCalendarLike_).
+    sec-temporal-totemporalcalendar step 1.a:
+      a. If _temporalCalendarLike_ has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
+        i. Return _temporalCalendarLike_.[[Calendar]].
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkToTemporalCalendarFastPath((temporalObject) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  const duration = new Temporal.Duration(0, 1);
+  calendar.dateAdd({ year: 2000, month: 5, day: 2, calendar: temporalObject }, duration);
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/date-infinity-throws-rangeerror.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Throws if any value in the property bag is Infinity or -Infinity
+esid: sec-temporal.calendar.prototype.dateadd
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+const duration = new Temporal.Duration(1);
+const base = { year: 2000, month: 5, day: 2 };
+
+[Infinity, -Infinity].forEach((inf) => {
+  ["year", "month", "day"].forEach((prop) => {
+    ["constrain", "reject"].forEach((overflow) => {
+      assert.throws(RangeError, () => instance.dateAdd({ ...base, [prop]: inf }, duration, { overflow }), `${prop} property cannot be ${inf} (overflow ${overflow}`);
+
+      const calls = [];
+      const obj = TemporalHelpers.toPrimitiveObserver(calls, inf, prop);
+      assert.throws(RangeError, () => instance.dateAdd({ ...base, [prop]: obj }, duration, { overflow }));
+      assert.compareArray(calls, [`get ${prop}.valueOf`, `call ${prop}.valueOf`], "it fails after fetching the primitive value");
+    });
+  });
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/duration-argument-string-negative-fractional-units.js

@@ -0,0 +1,18 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Strings with fractional duration units are treated with the correct sign
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+const instance = new Temporal.PlainDate(2000, 5, 2, calendar);
+
+const resultHours = calendar.dateAdd(instance, "-PT24.567890123H");
+TemporalHelpers.assertPlainDate(resultHours, 2000, 5, "M05", 1, "negative fractional hours");
+
+const resultMinutes = calendar.dateAdd(instance, "-PT1440.567890123M");
+TemporalHelpers.assertPlainDate(resultMinutes, 2000, 5, "M05", 1, "negative fractional minutes");

test/built-ins/Temporal/Calendar/prototype/dateAdd/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Temporal.Calendar.prototype.dateAdd.length is 2
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dateAdd, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Temporal.Calendar.prototype.dateAdd.name is "dateAdd".
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dateAdd, "name", {
+  value: "dateAdd",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateAdd/not-a-constructor.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: >
+  Temporal.Calendar.prototype.dateAdd does not implement [[Construct]], is not new-able
+info: |
+    Built-in function objects that are not identified as constructors do not implement the
+    [[Construct]] internal method unless otherwise specified in the description of a particular
+    function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Temporal]
+---*/
+
+assert.throws(TypeError, () => {
+  new Temporal.Calendar.prototype.dateAdd();
+}, "Calling as constructor");
+
+assert.sameValue(isConstructor(Temporal.Calendar.prototype.dateAdd), false,
+  "isConstructor(Temporal.Calendar.prototype.dateAdd)");

test/built-ins/Temporal/Calendar/prototype/dateAdd/overflow-invalid-string.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: RangeError thrown when overflow option not one of the allowed string values
+info: |
+    sec-getoption step 10:
+      10. If _values_ is not *undefined* and _values_ does not contain an element equal to _value_, throw a *RangeError* exception.
+    sec-temporal-totemporaloverflow step 1:
+      1. Return ? GetOption(_normalizedOptions_, *"overflow"*, « String », « *"constrain"*, *"reject"* », *"constrain"*).
+    sec-temporal.calendar.prototype.dateadd step 7:
+      7. Let _overflow_ be ? ToTemporalOverflow(_options_).
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+const date = new Temporal.PlainDate(2000, 5, 2, calendar);
+const duration = new Temporal.Duration(3, 3, 0, 3);
+assert.throws(RangeError, () => calendar.dateAdd(date, duration, { overflow: "other string" }));

test/built-ins/Temporal/Calendar/prototype/dateAdd/overflow-undefined.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Fallback value for overflow option
+info: |
+    sec-getoption step 3:
+      3. If _value_ is *undefined*, return _fallback_.
+    sec-temporal-totemporaloverflow step 1:
+      1. Return ? GetOption(_normalizedOptions_, *"overflow"*, « String », « *"constrain"*, *"reject"* », *"constrain"*).
+    sec-temporal.calendar.prototype.dateadd step 7:
+      7. Let _overflow_ be ? ToTemporalOverflow(_options_).
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+const date = new Temporal.PlainDate(2000, 5, 31, calendar);
+const duration = new Temporal.Duration(3, 1);
+
+const explicit = calendar.dateAdd(date, duration, { overflow: undefined });
+TemporalHelpers.assertPlainDate(explicit, 2003, 6, "M06", 30, "default overflow is constrain");
+const implicit = calendar.dateAdd(date, duration, {});
+TemporalHelpers.assertPlainDate(implicit, 2003, 6, "M06", 30, "default overflow is constrain");

test/built-ins/Temporal/Calendar/prototype/dateAdd/overflow-wrong-type.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: Type conversions for overflow option
+info: |
+    sec-getoption step 9.a:
+      a. Set _value_ to ? ToString(_value_).
+    sec-temporal-totemporaloverflow step 1:
+      1. Return ? GetOption(_normalizedOptions_, *"overflow"*, « String », « *"constrain"*, *"reject"* », *"constrain"*).
+    sec-temporal.calendar.prototype.dateadd step 7:
+      7. Let _overflow_ be ? ToTemporalOverflow(_options_).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+const date = new Temporal.PlainDate(2000, 5, 2, calendar);
+const duration = new Temporal.Duration(3, 3, 0, 3);
+TemporalHelpers.checkStringOptionWrongType("overflow", "constrain",
+  (overflow) => calendar.dateAdd(date, duration, { overflow }),
+  (result, descr) => TemporalHelpers.assertPlainDate(result, 2003, 8, "M08", 5, descr),
+);

test/built-ins/Temporal/Calendar/prototype/dateAdd/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateadd
+description: The "dateAdd" property of Temporal.Calendar.prototype
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar.prototype.dateAdd,
+  "function",
+  "`typeof Calendar.prototype.dateAdd` is `function`"
+);
+
+verifyProperty(Temporal.Calendar.prototype, "dateAdd", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateFromFields/builtin.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: >
+    Tests that Temporal.Calendar.prototype.dateFromFields
+    meets the requirements for built-in objects defined by the
+    introduction of chapter 17 of the ECMAScript Language Specification.
+info: |
+    Built-in functions that are not constructors do not have a "prototype" property unless
+    otherwise specified in the description of a particular function.
+
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar.prototype.dateFromFields),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar.prototype.dateFromFields),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar.prototype.dateFromFields),
+  Function.prototype, "prototype");
+
+assert.sameValue(Temporal.Calendar.prototype.dateFromFields.hasOwnProperty("prototype"),
+  false, "prototype property");

test/built-ins/Temporal/Calendar/prototype/dateFromFields/fields-not-object.js

@@ -0,0 +1,14 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: Throw a TypeError if the fields is not an object
+features: [Symbol, Temporal]
+---*/
+
+const tests = [undefined, null, false, "string", Symbol("sym"), Math.PI, 42n];
+const iso = Temporal.Calendar.from("iso8601");
+for (const fields of tests) {
+  assert.throws(TypeError, () => iso.dateFromFields(fields, {}));
+}

test/built-ins/Temporal/Calendar/prototype/dateFromFields/infinity-throws-rangeerror.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Throws if any value in the property bag is Infinity or -Infinity
+esid: sec-temporal.calendar.prototype.datefromfields
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+const base = { year: 2000, month: 5, day: 2 };
+
+[Infinity, -Infinity].forEach((inf) => {
+  ["year", "month", "day"].forEach((prop) => {
+    ["constrain", "reject"].forEach((overflow) => {
+      assert.throws(RangeError, () => instance.dateFromFields({ ...base, [prop]: inf }, { overflow }), `${prop} property cannot be ${inf} (overflow ${overflow}`);
+
+      const calls = [];
+      const obj = TemporalHelpers.toPrimitiveObserver(calls, inf, prop);
+      assert.throws(RangeError, () => instance.dateFromFields({ ...base, [prop]: obj }, { overflow }));
+      assert.compareArray(calls, [`get ${prop}.valueOf`, `call ${prop}.valueOf`], "it fails after fetching the primitive value");
+    });
+  });
+});

test/built-ins/Temporal/Calendar/prototype/dateFromFields/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: Temporal.Calendar.prototype.dateFromFields.length is 1
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dateFromFields, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateFromFields/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: Temporal.Calendar.prototype.dateFromFields.name is "dateFromFields".
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dateFromFields, "name", {
+  value: "dateFromFields",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateFromFields/not-a-constructor.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: >
+  Temporal.Calendar.prototype.dateFromFields does not implement [[Construct]], is not new-able
+info: |
+    Built-in function objects that are not identified as constructors do not implement the
+    [[Construct]] internal method unless otherwise specified in the description of a particular
+    function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Temporal]
+---*/
+
+assert.throws(TypeError, () => {
+  new Temporal.Calendar.prototype.dateFromFields();
+}, "Calling as constructor");
+
+assert.sameValue(isConstructor(Temporal.Calendar.prototype.dateFromFields), false,
+  "isConstructor(Temporal.Calendar.prototype.dateFromFields)");

test/built-ins/Temporal/Calendar/prototype/dateFromFields/overflow-invalid-string.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: RangeError thrown when overflow option not one of the allowed string values
+info: |
+    sec-getoption step 10:
+      10. If _values_ is not *undefined* and _values_ does not contain an element equal to _value_, throw a *RangeError* exception.
+    sec-temporal-totemporaloverflow step 1:
+      1. Return ? GetOption(_normalizedOptions_, *"overflow"*, « String », « *"constrain"*, *"reject"* », *"constrain"*).
+    sec-temporal-isodatefromfields step 2:
+      2. Let _overflow_ be ? ToTemporalOverflow(_options_).
+    sec-temporal.calendar.prototype.datefromfields step 6:
+      6. Let _result_ be ? ISODateFromFields(_fields_, _options_).
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+assert.throws(RangeError, () => calendar.dateFromFields({ year: 2000, month: 5, day: 2 }, { overflow: "other string" }));

test/built-ins/Temporal/Calendar/prototype/dateFromFields/overflow-undefined.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: Fallback value for overflow option
+info: |
+    sec-getoption step 3:
+      3. If _value_ is *undefined*, return _fallback_.
+    sec-temporal-totemporaloverflow step 1:
+      1. Return ? GetOption(_normalizedOptions_, *"overflow"*, « String », « *"constrain"*, *"reject"* », *"constrain"*).
+    sec-temporal-isodatefromfields step 2:
+      2. Let _overflow_ be ? ToTemporalOverflow(_options_).
+    sec-temporal.calendar.prototype.datefromfields step 6:
+      6. Let _result_ be ? ISODateFromFields(_fields_, _options_).
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+
+const explicit = calendar.dateFromFields({ year: 2000, month: 15, day: 2 }, { overflow: undefined });
+TemporalHelpers.assertPlainDate(explicit, 2000, 12, "M12", 2, "default overflow is constrain");
+const implicit = calendar.dateFromFields({ year: 2000, month: 15, day: 2 }, {});
+TemporalHelpers.assertPlainDate(implicit, 2000, 12, "M12", 2, "default overflow is constrain");

test/built-ins/Temporal/Calendar/prototype/dateFromFields/overflow-wrong-type.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: Type conversions for overflow option
+info: |
+    sec-getoption step 9.a:
+      a. Set _value_ to ? ToString(_value_).
+    sec-temporal-totemporaloverflow step 1:
+      1. Return ? GetOption(_normalizedOptions_, *"overflow"*, « String », « *"constrain"*, *"reject"* », *"constrain"*).
+    sec-temporal-isodatefromfields step 2:
+      2. Let _overflow_ be ? ToTemporalOverflow(_options_).
+    sec-temporal.calendar.prototype.datefromfields step 6:
+      6. Let _result_ be ? ISODateFromFields(_fields_, _options_).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+TemporalHelpers.checkStringOptionWrongType("overflow", "constrain",
+  (overflow) => calendar.dateFromFields({ year: 2000, month: 5, day: 2 }, { overflow }),
+  (result, descr) => TemporalHelpers.assertPlainDate(result, 2000, 5, "M05", 2, descr),
+);

test/built-ins/Temporal/Calendar/prototype/dateFromFields/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.datefromfields
+description: The "dateFromFields" property of Temporal.Calendar.prototype
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar.prototype.dateFromFields,
+  "function",
+  "`typeof Calendar.prototype.dateFromFields` is `function`"
+);
+
+verifyProperty(Temporal.Calendar.prototype, "dateFromFields", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/argument-infinity-throws-rangeerror.js

@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Throws if any value in a property bag for either argument is Infinity or -Infinity
+esid: sec-temporal.calendar.prototype.dateuntil
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+const other = new Temporal.PlainDate(2001, 6, 3);
+const base = { year: 2000, month: 5, day: 2 };
+
+[Infinity, -Infinity].forEach((inf) => {
+  ["year", "month", "day"].forEach((prop) => {
+    assert.throws(RangeError, () => instance.dateUntil({ ...base, [prop]: inf }, other), `${prop} property cannot be ${inf}`);
+
+    assert.throws(RangeError, () => instance.dateUntil(other, { ...base, [prop]: inf }), `${prop} property cannot be ${inf}`);
+
+    const calls1 = [];
+    const obj1 = TemporalHelpers.toPrimitiveObserver(calls1, inf, prop);
+    assert.throws(RangeError, () => instance.dateUntil({ ...base, [prop]: obj1 }, other));
+    assert.compareArray(calls1, [`get ${prop}.valueOf`, `call ${prop}.valueOf`], "it fails after fetching the primitive value");
+
+    const calls2 = [];
+    const obj2 = TemporalHelpers.toPrimitiveObserver(calls2, inf, prop);
+    assert.throws(RangeError, () => instance.dateUntil(other, { ...base, [prop]: obj2 }));
+    assert.compareArray(calls2, [`get ${prop}.valueOf`, `call ${prop}.valueOf`], "it fails after fetching the primitive value");
+  });
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/argument-plaindatetime.js

@@ -0,0 +1,30 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Fast path for converting Temporal.PlainDateTime to Temporal.PlainDate by reading internal slots
+info: |
+    sec-temporal.calendar.prototype.dateuntil steps 4–5:
+      4. Set _one_ to ? ToTemporalDate(_one_).
+      5. Set _two_ to ? ToTemporalDate(_two_).
+    sec-temporal-totemporaldate step 2.b:
+      b. If _item_ has an [[InitializedTemporalDateTime]] internal slot, then
+        i. Return ! CreateTemporalDate(_item_.[[ISOYear]], _item_.[[ISOMonth]], _item_.[[ISODay]], _item_.[[Calendar]]).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const date = new Temporal.PlainDate(2000, 5, 2);
+
+TemporalHelpers.checkPlainDateTimeConversionFastPath((datetime) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  const result = calendar.dateUntil(datetime, date);
+  assert.sameValue(result.total({ unit: "nanoseconds" }), 0, "time part dropped");
+});
+
+TemporalHelpers.checkPlainDateTimeConversionFastPath((datetime) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  const result = calendar.dateUntil(date, datetime);
+  assert.sameValue(result.total({ unit: "nanoseconds" }), 0, "time part dropped");
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-non-integer.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: RangeError thrown if time zone reports an offset that is not an integer number of nanoseconds
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[3600_000_000_000.5, NaN, Infinity, -Infinity].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const date = new Temporal.PlainDate(2000, 5, 2);
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+
+  assert.throws(RangeError, () => calendar.dateUntil(datetime, date));
+  assert.throws(RangeError, () => calendar.dateUntil(date, datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-out-of-range.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: RangeError thrown if time zone reports an offset that is out of range
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[-86400_000_000_001, 86400_000_000_001].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const date = new Temporal.PlainDate(2000, 5, 2);
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+
+  assert.throws(RangeError, () => calendar.dateUntil(datetime, date));
+  assert.throws(RangeError, () => calendar.dateUntil(date, datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-wrong-type.js

@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: TypeError thrown if time zone reports an offset that is not a Number
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[
+  undefined,
+  null,
+  true,
+  "+01:00",
+  Symbol(),
+  3600_000_000_000n,
+  {},
+  { valueOf() { return 3600_000_000_000; } },
+].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const date = new Temporal.PlainDate(2000, 5, 2);
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+
+  assert.throws(TypeError, () => calendar.dateUntil(datetime, date));
+  assert.throws(TypeError, () => calendar.dateUntil(date, datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/basic.js

@@ -0,0 +1,45 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Basic tests for dateUntil().
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const iso = Temporal.Calendar.from("iso8601");
+const date1 = Temporal.PlainDate.from("1999-09-03");
+const date2 = Temporal.PlainDate.from("2000-01-01");
+
+TemporalHelpers.assertDuration(
+  iso.dateUntil(date1, date2, {}),
+  0, 0, 0, 120, 0, 0, 0, 0, 0, 0, "two PlainDates");
+
+TemporalHelpers.assertDuration(
+  iso.dateUntil(Temporal.PlainDateTime.from("1999-09-03T08:15:30"), date2, {}),
+  0, 0, 0, 120, 0, 0, 0, 0, 0, 0, "first argument: PlainDateTime");
+
+TemporalHelpers.assertDuration(
+  iso.dateUntil({ year: 1999, month: 9, day: 3 }, date2, {}),
+  0, 0, 0, 120, 0, 0, 0, 0, 0, 0, "first argument: property bag");
+
+TemporalHelpers.assertDuration(
+  iso.dateUntil("1999-09-03", date2, {}),
+  0, 0, 0, 120, 0, 0, 0, 0, 0, 0, "first argument: string");
+
+assert.throws(TypeError, () => iso.dateUntil({ month: 11 }, date2, {}), "first argument: missing property");
+
+TemporalHelpers.assertDuration(
+  iso.dateUntil(date1, Temporal.PlainDateTime.from("2000-01-01T08:15:30"), {}),
+  0, 0, 0, 120, 0, 0, 0, 0, 0, 0, "second argument: PlainDateTime");
+
+TemporalHelpers.assertDuration(
+  iso.dateUntil(date1, { year: 2000, month: 1, day: 1 }, {}),
+  0, 0, 0, 120, 0, 0, 0, 0, 0, 0, "second argument: property bag");
+
+TemporalHelpers.assertDuration(
+  iso.dateUntil(date1, "2000-01-01", {}),
+  0, 0, 0, 120, 0, 0, 0, 0, 0, 0, "second argument: string");
+
+assert.throws(TypeError, () => iso.dateUntil(date1, { month: 11 }, {}), "second argument: missing property");

test/built-ins/Temporal/Calendar/prototype/dateUntil/builtin.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: >
+    Tests that Temporal.Calendar.prototype.dateUntil
+    meets the requirements for built-in objects defined by the
+    introduction of chapter 17 of the ECMAScript Language Specification.
+info: |
+    Built-in functions that are not constructors do not have a "prototype" property unless
+    otherwise specified in the description of a particular function.
+
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar.prototype.dateUntil),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar.prototype.dateUntil),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar.prototype.dateUntil),
+  Function.prototype, "prototype");
+
+assert.sameValue(Temporal.Calendar.prototype.dateUntil.hasOwnProperty("prototype"),
+  false, "prototype property");

test/built-ins/Temporal/Calendar/prototype/dateUntil/calendar-fields-iterable.js

@@ -0,0 +1,40 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Verify the result of calendar.fields() is treated correctly.
+info: |
+    sec-temporal.calendar.prototype.dateuntil steps 4–5:
+      4. Set _one_ to ? ToTemporalDate(_one_).
+      5. Set _two_ to ? ToTemporalDate(_two_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _fieldNames_ be ? CalendarFields(_calendar_, « *"day"*, *"month"*, *"monthCode"*, *"year"* »).
+    sec-temporal-calendarfields step 4:
+      4. Let _result_ be ? IterableToListOfType(_fieldsArray_, « String »).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const expected = [
+  "day",
+  "month",
+  "monthCode",
+  "year",
+];
+
+const calendar1 = TemporalHelpers.calendarFieldsIterable();
+const calendar2 = TemporalHelpers.calendarFieldsIterable();
+const calendar3 = TemporalHelpers.calendarFieldsIterable();
+calendar1.dateUntil(
+  { year: 2000, month: 5, day: 2, calendar: calendar2 },
+  { year: 2005, month: 6, day: 3, calendar: calendar3 },
+);
+
+assert.sameValue(calendar1.fieldsCallCount, 0, "fields() method not called");
+assert.sameValue(calendar2.fieldsCallCount, 1, "fields() method called once");
+assert.sameValue(calendar3.fieldsCallCount, 1, "fields() method called once");
+assert.compareArray(calendar2.fieldsCalledWith[0], expected, "fields() method called with correct args");
+assert(calendar2.iteratorExhausted[0], "iterated through the whole iterable");
+assert.compareArray(calendar3.fieldsCalledWith[0], expected, "fields() method called with correct args");
+assert(calendar3.iteratorExhausted[0], "iterated through the whole iterable");

test/built-ins/Temporal/Calendar/prototype/dateUntil/calendar-temporal-object.js

@@ -0,0 +1,30 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Fast path for converting other Temporal objects to Temporal.Calendar by reading internal slots
+info: |
+    sec-temporal.calendar.prototype.dateuntil steps 4–5:
+      4. Set _one_ to ? ToTemporalDate(_one_).
+      5. Set _two_ to ? ToTemporalDate(_two_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _calendar_ be ? GetTemporalCalendarWithISODefault(_item_).
+    sec-temporal-gettemporalcalendarwithisodefault step 2:
+      2. Return ? ToTemporalCalendarWithISODefault(_calendar_).
+    sec-temporal-totemporalcalendarwithisodefault step 2:
+      3. Return ? ToTemporalCalendar(_temporalCalendarLike_).
+    sec-temporal-totemporalcalendar step 1.a:
+      a. If _temporalCalendarLike_ has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
+        i. Return _temporalCalendarLike_.[[Calendar]].
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkToTemporalCalendarFastPath((temporalObject) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  calendar.dateUntil(
+    { year: 2000, month: 5, day: 2, calendar: temporalObject },
+    { year: 2005, month: 6, day: 3, calendar: temporalObject },
+  );
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/largestunit-plurals-accepted.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Plural units are accepted as well for the largestUnit option
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const earlier = new Temporal.PlainDate(2000, 5, 2);
+const later = new Temporal.PlainDate(2001, 6, 12);
+const calendar = new Temporal.Calendar("iso8601");
+const validUnits = [
+  "year",
+  "month",
+  "week",
+  "day",
+];
+TemporalHelpers.checkPluralUnitsAccepted((largestUnit) => calendar.dateUntil(earlier, later, { largestUnit }), validUnits);

test/built-ins/Temporal/Calendar/prototype/dateUntil/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Temporal.Calendar.prototype.dateUntil.length is 2
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dateUntil, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Temporal.Calendar.prototype.dateUntil.name is "dateUntil".
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dateUntil, "name", {
+  value: "dateUntil",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dateUntil/not-a-constructor.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: >
+  Temporal.Calendar.prototype.dateUntil does not implement [[Construct]], is not new-able
+info: |
+    Built-in function objects that are not identified as constructors do not implement the
+    [[Construct]] internal method unless otherwise specified in the description of a particular
+    function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Temporal]
+---*/
+
+assert.throws(TypeError, () => {
+  new Temporal.Calendar.prototype.dateUntil();
+}, "Calling as constructor");
+
+assert.sameValue(isConstructor(Temporal.Calendar.prototype.dateUntil), false,
+  "isConstructor(Temporal.Calendar.prototype.dateUntil)");

test/built-ins/Temporal/Calendar/prototype/dateUntil/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: The "dateUntil" property of Temporal.Calendar.prototype
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar.prototype.dateUntil,
+  "function",
+  "`typeof Calendar.prototype.dateUntil` is `function`"
+);
+
+verifyProperty(Temporal.Calendar.prototype, "dateUntil", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/day/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-non-integer.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: RangeError thrown if time zone reports an offset that is not an integer number of nanoseconds
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[3600_000_000_000.5, NaN, -Infinity, Infinity].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.day(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/day/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-out-of-range.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: RangeError thrown if time zone reports an offset that is out of range
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[-86400_000_000_001, 86400_000_000_001].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.day(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/day/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-wrong-type.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: TypeError thrown if time zone reports an offset that is not a Number
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[
+  undefined,
+  null,
+  true,
+  "+01:00",
+  Symbol(),
+  3600_000_000_000n,
+  {},
+  { valueOf() { return 3600_000_000_000; } },
+].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(TypeError, () => calendar.day(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/day/basic.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: Basic tests for day().
+features: [Temporal]
+---*/
+
+const iso = Temporal.Calendar.from("iso8601");
+const res = 5;
+assert.sameValue(iso.day(Temporal.PlainDate.from("1994-11-05")), res, "PlainDate");
+assert.sameValue(iso.day(Temporal.PlainDateTime.from("1994-11-05T08:15:30")), res, "PlainDateTime");
+assert.sameValue(iso.day(Temporal.PlainMonthDay.from("11-05")), res, "PlainMonthDay");
+assert.sameValue(iso.day({ year: 1994, month: 11, day: 5 }), res, "property bag");
+assert.sameValue(iso.day("1994-11-05"), res, "string");
+assert.throws(TypeError, () => iso.day({ year: 2000 }), "property bag with missing properties");

test/built-ins/Temporal/Calendar/prototype/day/builtin.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: >
+    Tests that Temporal.Calendar.prototype.day
+    meets the requirements for built-in objects defined by the
+    introduction of chapter 17 of the ECMAScript Language Specification.
+info: |
+    Built-in functions that are not constructors do not have a "prototype" property unless
+    otherwise specified in the description of a particular function.
+
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar.prototype.day),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar.prototype.day),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar.prototype.day),
+  Function.prototype, "prototype");
+
+assert.sameValue(Temporal.Calendar.prototype.day.hasOwnProperty("prototype"),
+  false, "prototype property");

test/built-ins/Temporal/Calendar/prototype/day/calendar-fields-iterable.js

@@ -0,0 +1,34 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: Verify the result of calendar.fields() is treated correctly.
+info: |
+    sec-temporal.calendar.prototype.day step 4:
+      4. Return ? ISODay(_dateOrDateTime_).
+    sec-temporal-isoday step 1.a:
+      a. Set _dateOrDateTime_ to ? ToTemporalDate(_dateOrDateTime_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _fieldNames_ be ? CalendarFields(calendar, « *"day"*, *"month"*, *"monthCode"*, *"year"* »).
+    sec-temporal-calendarfields step 4:
+      4. Let _result_ be ? IterableToListOfType(_fieldsArray_, « String »).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const expected = [
+  "day",
+  "month",
+  "monthCode",
+  "year",
+];
+
+const calendar1 = TemporalHelpers.calendarFieldsIterable();
+const calendar2 = TemporalHelpers.calendarFieldsIterable();
+calendar1.day({ year: 2000, month: 5, day: 2, calendar: calendar2 });
+
+assert.sameValue(calendar1.fieldsCallCount, 0, "fields() method not called");
+assert.sameValue(calendar2.fieldsCallCount, 1, "fields() method called once");
+assert.compareArray(calendar2.fieldsCalledWith[0], expected, "fields() method called with correct args");
+assert(calendar2.iteratorExhausted[0], "iterated through the whole iterable");

test/built-ins/Temporal/Calendar/prototype/day/calendar-temporal-object.js

@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: Fast path for converting other Temporal objects to Temporal.Calendar by reading internal slots
+info: |
+    sec-temporal.calendar.prototype.day step 4:
+      4. Return ? ISODay(_dateOrDateTime_).
+    sec-temporal-isoday step 1.a:
+      a. Set _dateOrDateTime_ to ? ToTemporalDate(_dateOrDateTime_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _calendar_ be ? GetTemporalCalendarWithISODefault(_item_).
+    sec-temporal-gettemporalcalendarwithisodefault step 2:
+      2. Return ? ToTemporalCalendarWithISODefault(_calendar_).
+    sec-temporal-totemporalcalendarwithisodefault step 2:
+      3. Return ? ToTemporalCalendar(_temporalCalendarLike_).
+    sec-temporal-totemporalcalendar step 1.a:
+      a. If _temporalCalendarLike_ has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
+        i. Return _temporalCalendarLike_.[[Calendar]].
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkToTemporalCalendarFastPath((temporalObject) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  calendar.day({ year: 2000, month: 5, day: 2, calendar: temporalObject });
+});

test/built-ins/Temporal/Calendar/prototype/day/infinity-throws-rangeerror.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Throws if any value in the property bag is Infinity or -Infinity
+esid: sec-temporal.calendar.prototype.day
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+const base = { year: 2000, month: 5, day: 2 };
+
+[Infinity, -Infinity].forEach((inf) => {
+  ["year", "month", "day"].forEach((prop) => {
+    assert.throws(RangeError, () => instance.day({ ...base, [prop]: inf }), `${prop} property cannot be ${inf}`);
+
+    const calls = [];
+    const obj = TemporalHelpers.toPrimitiveObserver(calls, inf, prop);
+    assert.throws(RangeError, () => instance.day({ ...base, [prop]: obj }));
+    assert.compareArray(calls, [`get ${prop}.valueOf`, `call ${prop}.valueOf`], "it fails after fetching the primitive value");
+  });
+});

test/built-ins/Temporal/Calendar/prototype/day/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: Temporal.Calendar.prototype.day.length is 1
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.day, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/day/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: Temporal.Calendar.prototype.day.name is "day".
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.day, "name", {
+  value: "day",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/day/not-a-constructor.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: >
+  Temporal.Calendar.prototype.day does not implement [[Construct]], is not new-able
+info: |
+    Built-in function objects that are not identified as constructors do not implement the
+    [[Construct]] internal method unless otherwise specified in the description of a particular
+    function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Temporal]
+---*/
+
+assert.throws(TypeError, () => {
+  new Temporal.Calendar.prototype.day();
+}, "Calling as constructor");
+
+assert.sameValue(isConstructor(Temporal.Calendar.prototype.day), false,
+  "isConstructor(Temporal.Calendar.prototype.day)");

test/built-ins/Temporal/Calendar/prototype/day/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.day
+description: The "day" property of Temporal.Calendar.prototype
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar.prototype.day,
+  "function",
+  "`typeof Calendar.prototype.day` is `function`"
+);
+
+verifyProperty(Temporal.Calendar.prototype, "day", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-non-integer.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: RangeError thrown if time zone reports an offset that is not an integer number of nanoseconds
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[3600_000_000_000.5, NaN, -Infinity, Infinity].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.dayOfWeek(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-out-of-range.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: RangeError thrown if time zone reports an offset that is out of range
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[-86400_000_000_001, 86400_000_000_001].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.dayOfWeek(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-wrong-type.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: TypeError thrown if time zone reports an offset that is not a Number
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[
+  undefined,
+  null,
+  true,
+  "+01:00",
+  Symbol(),
+  3600_000_000_000n,
+  {},
+  { valueOf() { return 3600_000_000_000; } },
+].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(TypeError, () => calendar.dayOfWeek(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/basic.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Basic tests for dayOfWeek().
+features: [Temporal]
+---*/
+
+const iso = Temporal.Calendar.from("iso8601");
+const res = 6;
+assert.sameValue(iso.dayOfWeek(Temporal.PlainDate.from("1994-11-05")), res, "PlainDate");
+assert.sameValue(iso.dayOfWeek(Temporal.PlainDateTime.from("1994-11-05T08:15:30")), res, "PlainDateTime");
+assert.sameValue(iso.dayOfWeek({ year: 1994, month: 11, day: 5 }), res, "property bag");
+assert.sameValue(iso.dayOfWeek("1994-11-05"), res, "string");
+assert.throws(TypeError, () => iso.dayOfWeek({ year: 2000 }), "property bag with missing properties");

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/builtin.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: >
+    Tests that Temporal.Calendar.prototype.dayOfWeek
+    meets the requirements for built-in objects defined by the
+    introduction of chapter 17 of the ECMAScript Language Specification.
+info: |
+    Built-in functions that are not constructors do not have a "prototype" property unless
+    otherwise specified in the description of a particular function.
+
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar.prototype.dayOfWeek),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar.prototype.dayOfWeek),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar.prototype.dayOfWeek),
+  Function.prototype, "prototype");
+
+assert.sameValue(Temporal.Calendar.prototype.dayOfWeek.hasOwnProperty("prototype"),
+  false, "prototype property");

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/calendar-fields-iterable.js

@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Verify the result of calendar.fields() is treated correctly.
+info: |
+    sec-temporal.calendar.prototype.dayofweek step 4:
+      4. Let _date_ be ? ToTemporalDate(_dateOrDateTime_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _fieldNames_ be ? CalendarFields(_calendar_, « *"day"*, *"month"*, *"monthCode"*, *"year"* »).
+    sec-temporal-calendarfields step 4:
+      4. Let _result_ be ? IterableToListOfType(_fieldsArray_, « String »).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const expected = [
+  "day",
+  "month",
+  "monthCode",
+  "year",
+];
+
+const calendar1 = TemporalHelpers.calendarFieldsIterable();
+const calendar2 = TemporalHelpers.calendarFieldsIterable();
+calendar1.dayOfWeek({ year: 2000, month: 5, day: 2, calendar: calendar2 });
+
+assert.sameValue(calendar1.fieldsCallCount, 0, "fields() method not called");
+assert.sameValue(calendar2.fieldsCallCount, 1, "fields() method called once");
+assert.compareArray(calendar2.fieldsCalledWith[0], expected, "fields() method called with correct args");
+assert(calendar2.iteratorExhausted[0], "iterated through the whole iterable");

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/calendar-temporal-object.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Fast path for converting other Temporal objects to Temporal.Calendar by reading internal slots
+info: |
+    sec-temporal.calendar.prototype.dayofweek step 4:
+      4. Let _date_ be ? ToTemporalDate(_dateOrDateTime_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _calendar_ be ? GetTemporalCalendarWithISODefault(_item_).
+    sec-temporal-gettemporalcalendarwithisodefault step 2:
+      2. Return ? ToTemporalCalendarWithISODefault(_calendar_).
+    sec-temporal-totemporalcalendarwithisodefault step 2:
+      3. Return ? ToTemporalCalendar(_temporalCalendarLike_).
+    sec-temporal-totemporalcalendar step 1.a:
+      a. If _temporalCalendarLike_ has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
+        i. Return _temporalCalendarLike_.[[Calendar]].
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkToTemporalCalendarFastPath((temporalObject) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  calendar.dayOfWeek({ year: 2000, month: 5, day: 2, calendar: temporalObject });
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/infinity-throws-rangeerror.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Throws if any value in the property bag is Infinity or -Infinity
+esid: sec-temporal.calendar.prototype.dayofweek
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+const base = { year: 2000, month: 5, day: 2 };
+
+[Infinity, -Infinity].forEach((inf) => {
+  ["year", "month", "day"].forEach((prop) => {
+    assert.throws(RangeError, () => instance.dayOfWeek({ ...base, [prop]: inf }), `${prop} property cannot be ${inf}`);
+
+    const calls = [];
+    const obj = TemporalHelpers.toPrimitiveObserver(calls, inf, prop);
+    assert.throws(RangeError, () => instance.dayOfWeek({ ...base, [prop]: obj }));
+    assert.compareArray(calls, [`get ${prop}.valueOf`, `call ${prop}.valueOf`], "it fails after fetching the primitive value");
+  });
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Temporal.Calendar.prototype.dayOfWeek.length is 1
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dayOfWeek, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Temporal.Calendar.prototype.dayOfWeek.name is "dayOfWeek".
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dayOfWeek, "name", {
+  value: "dayOfWeek",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/not-a-constructor.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: >
+  Temporal.Calendar.prototype.dayOfWeek does not implement [[Construct]], is not new-able
+info: |
+    Built-in function objects that are not identified as constructors do not implement the
+    [[Construct]] internal method unless otherwise specified in the description of a particular
+    function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Temporal]
+---*/
+
+assert.throws(TypeError, () => {
+  new Temporal.Calendar.prototype.dayOfWeek();
+}, "Calling as constructor");
+
+assert.sameValue(isConstructor(Temporal.Calendar.prototype.dayOfWeek), false,
+  "isConstructor(Temporal.Calendar.prototype.dayOfWeek)");

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: The "dayOfWeek" property of Temporal.Calendar.prototype
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar.prototype.dayOfWeek,
+  "function",
+  "`typeof Calendar.prototype.dayOfWeek` is `function`"
+);
+
+verifyProperty(Temporal.Calendar.prototype, "dayOfWeek", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-non-integer.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: RangeError thrown if time zone reports an offset that is not an integer number of nanoseconds
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[3600_000_000_000.5, NaN, -Infinity, Infinity].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.dayOfYear(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-out-of-range.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: RangeError thrown if time zone reports an offset that is out of range
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[-86400_000_000_001, 86400_000_000_001].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.dayOfYear(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-wrong-type.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: TypeError thrown if time zone reports an offset that is not a Number
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[
+  undefined,
+  null,
+  true,
+  "+01:00",
+  Symbol(),
+  3600_000_000_000n,
+  {},
+  { valueOf() { return 3600_000_000_000; } },
+].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(TypeError, () => calendar.dayOfYear(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/basic.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Basic tests for dayOfYear().
+features: [Temporal]
+---*/
+
+const iso = Temporal.Calendar.from("iso8601");
+const res = 309;
+assert.sameValue(iso.dayOfYear(Temporal.PlainDate.from("1994-11-05")), res, "PlainDate");
+assert.sameValue(iso.dayOfYear(Temporal.PlainDateTime.from("1994-11-05T08:15:30")), res, "PlainDateTime");
+assert.sameValue(iso.dayOfYear({ year: 1994, month: 11, day: 5 }), res, "property bag");
+assert.sameValue(iso.dayOfYear("1994-11-05"), res, "string");
+assert.throws(TypeError, () => iso.dayOfYear({ year: 2000 }), "property bag with missing properties");

test/built-ins/Temporal/Calendar/prototype/dayOfYear/builtin.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: >
+    Tests that Temporal.Calendar.prototype.dayOfYear
+    meets the requirements for built-in objects defined by the
+    introduction of chapter 17 of the ECMAScript Language Specification.
+info: |
+    Built-in functions that are not constructors do not have a "prototype" property unless
+    otherwise specified in the description of a particular function.
+
+    Unless specified otherwise, a built-in object that is callable as a function is a built-in
+    function object with the characteristics described in 10.3. Unless specified otherwise, the
+    [[Extensible]] internal slot of a built-in object initially has the value true.
+
+    Unless otherwise specified every built-in function and every built-in constructor has the
+    Function prototype object [...] as the value of its [[Prototype]] internal slot.
+features: [Temporal]
+---*/
+
+assert.sameValue(Object.isExtensible(Temporal.Calendar.prototype.dayOfYear),
+  true, "Built-in objects must be extensible.");
+
+assert.sameValue(Object.prototype.toString.call(Temporal.Calendar.prototype.dayOfYear),
+  "[object Function]", "Object.prototype.toString");
+
+assert.sameValue(Object.getPrototypeOf(Temporal.Calendar.prototype.dayOfYear),
+  Function.prototype, "prototype");
+
+assert.sameValue(Temporal.Calendar.prototype.dayOfYear.hasOwnProperty("prototype"),
+  false, "prototype property");

test/built-ins/Temporal/Calendar/prototype/dayOfYear/calendar-fields-iterable.js

@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Verify the result of calendar.fields() is treated correctly.
+info: |
+    sec-temporal.calendar.prototype.dayofyear step 4:
+      4. Let _date_ be ? ToTemporalDate(_dateOrDateTime_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _fieldNames_ be ? CalendarFields(_calendar_, « *"day"*, *"month"*, *"monthCode"*, *"year"* »).
+    sec-temporal-calendarfields step 4:
+      4. Let _result_ be ? IterableToListOfType(_fieldsArray_, « String »).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const expected = [
+  "day",
+  "month",
+  "monthCode",
+  "year",
+];
+
+const calendar1 = TemporalHelpers.calendarFieldsIterable();
+const calendar2 = TemporalHelpers.calendarFieldsIterable();
+calendar1.dayOfYear({ year: 2000, month: 5, day: 2, calendar: calendar2 });
+
+assert.sameValue(calendar1.fieldsCallCount, 0, "fields() method not called");
+assert.sameValue(calendar2.fieldsCallCount, 1, "fields() method called once");
+assert.compareArray(calendar2.fieldsCalledWith[0], expected, "fields() method called with correct args");
+assert(calendar2.iteratorExhausted[0], "iterated through the whole iterable");

test/built-ins/Temporal/Calendar/prototype/dayOfYear/calendar-temporal-object.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Fast path for converting other Temporal objects to Temporal.Calendar by reading internal slots
+info: |
+    sec-temporal.calendar.prototype.dayofyear step 4:
+      4. Let _date_ be ? ToTemporalDate(_dateOrDateTime_).
+    sec-temporal-totemporaldate step 2.c:
+      c. Let _calendar_ be ? GetTemporalCalendarWithISODefault(_item_).
+    sec-temporal-gettemporalcalendarwithisodefault step 2:
+      2. Return ? ToTemporalCalendarWithISODefault(_calendar_).
+    sec-temporal-totemporalcalendarwithisodefault step 2:
+      3. Return ? ToTemporalCalendar(_temporalCalendarLike_).
+    sec-temporal-totemporalcalendar step 1.a:
+      a. If _temporalCalendarLike_ has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
+        i. Return _temporalCalendarLike_.[[Calendar]].
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+TemporalHelpers.checkToTemporalCalendarFastPath((temporalObject) => {
+  const calendar = new Temporal.Calendar("iso8601");
+  calendar.dayOfYear({ year: 2000, month: 5, day: 2, calendar: temporalObject });
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/infinity-throws-rangeerror.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Throws if any value in the property bag is Infinity or -Infinity
+esid: sec-temporal.calendar.prototype.dayofyear
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+const base = { year: 2000, month: 5, day: 2 };
+
+[Infinity, -Infinity].forEach((inf) => {
+  ["year", "month", "day"].forEach((prop) => {
+    assert.throws(RangeError, () => instance.dayOfYear({ ...base, [prop]: inf }), `${prop} property cannot be ${inf}`);
+
+    const calls = [];
+    const obj = TemporalHelpers.toPrimitiveObserver(calls, inf, prop);
+    assert.throws(RangeError, () => instance.dayOfYear({ ...base, [prop]: obj }));
+    assert.compareArray(calls, [`get ${prop}.valueOf`, `call ${prop}.valueOf`], "it fails after fetching the primitive value");
+  });
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/length.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Temporal.Calendar.prototype.dayOfYear.length is 1
+info: |
+    Every built-in function object, including constructors, has a "length" property whose value is
+    an integer. Unless otherwise specified, this value is equal to the largest number of named
+    arguments shown in the subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which are shown using the form
+    «...name») are not included in the default argument count.
+
+    Unless otherwise specified, the "length" property of a built-in function object has the
+    attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dayOfYear, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Temporal.Calendar.prototype.dayOfYear.name is "dayOfYear".
+info: |
+    Every built-in function object, including constructors, that is not identified as an anonymous
+    function has a "name" property whose value is a String. Unless otherwise specified, this value
+    is the name that is given to the function in this specification.
+
+    Unless otherwise specified, the "name" property of a built-in function object, if it exists,
+    has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+verifyProperty(Temporal.Calendar.prototype.dayOfYear, "name", {
+  value: "dayOfYear",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/dayOfYear/not-a-constructor.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: >
+  Temporal.Calendar.prototype.dayOfYear does not implement [[Construct]], is not new-able
+info: |
+    Built-in function objects that are not identified as constructors do not implement the
+    [[Construct]] internal method unless otherwise specified in the description of a particular
+    function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Temporal]
+---*/
+
+assert.throws(TypeError, () => {
+  new Temporal.Calendar.prototype.dayOfYear();
+}, "Calling as constructor");
+
+assert.sameValue(isConstructor(Temporal.Calendar.prototype.dayOfYear), false,
+  "isConstructor(Temporal.Calendar.prototype.dayOfYear)");

test/built-ins/Temporal/Calendar/prototype/dayOfYear/prop-desc.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: The "dayOfYear" property of Temporal.Calendar.prototype
+includes: [propertyHelper.js]
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Calendar.prototype.dayOfYear,
+  "function",
+  "`typeof Calendar.prototype.dayOfYear` is `function`"
+);
+
+verifyProperty(Temporal.Calendar.prototype, "dayOfYear", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Temporal/Calendar/prototype/daysInMonth/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-non-integer.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.daysinmonth
+description: RangeError thrown if time zone reports an offset that is not an integer number of nanoseconds
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[3600_000_000_000.5, NaN, -Infinity, Infinity].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.daysInMonth(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/daysInMonth/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-out-of-range.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.daysinmonth
+description: RangeError thrown if time zone reports an offset that is out of range
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[-86400_000_000_001, 86400_000_000_001].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(RangeError, () => calendar.daysInMonth(datetime));
+});

test/built-ins/Temporal/Calendar/prototype/daysInMonth/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-wrong-type.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.daysinmonth
+description: TypeError thrown if time zone reports an offset that is not a Number
+features: [Temporal]
+includes: [temporalHelpers.js]
+---*/
+
+[
+  undefined,
+  null,
+  true,
+  "+01:00",
+  Symbol(),
+  3600_000_000_000n,
+  {},
+  { valueOf() { return 3600_000_000_000; } },
+].forEach((wrongOffset) => {
+  const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
+  const calendar = new Temporal.Calendar("iso8601");
+  const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
+  assert.throws(TypeError, () => calendar.daysInMonth(datetime));
+});