Temporal: Test observable calls on fields object from PrepareTemporalFields

As of https://github.com/tc39/proposal-temporal/pull/2219 the object
returned from the PrepareTemporalFields abstract operation should be a
null-prototype object. There are a number of places where this is
observable in one of the calendar's ...FromFields() methods. This adds
tests for this behaviour everywhere it is observable.

harness/temporalHelpers.js

@@ -895,6 +895,44 @@ var TemporalHelpers = {
     assert.compareArray(actual, expected, "property getters not called");
   },
 
+  /*
+   * A custom calendar used in prototype pollution checks. Verifies that the
+   * fromFields methods are always called with a null-prototype fields object.
+   */
+  calendarCheckFieldsPrototypePollution() {
+    class CalendarCheckFieldsPrototypePollution extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.dateFromFieldsCallCount = 0;
+        this.yearMonthFromFieldsCallCount = 0;
+        this.monthDayFromFieldsCallCount = 0;
+      }
+
+      // toString must remain "iso8601", so that some methods don't throw due to
+      // incompatible calendars
+
+      dateFromFields(fields, options = {}) {
+        this.dateFromFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(fields), null, "dateFromFields should be called with null-prototype fields object");
+        return super.dateFromFields(fields, options);
+      }
+
+      yearMonthFromFields(fields, options = {}) {
+        this.yearMonthFromFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(fields), null, "yearMonthFromFields should be called with null-prototype fields object");
+        return super.yearMonthFromFields(fields, options);
+      }
+
+      monthDayFromFields(fields, options = {}) {
+        this.monthDayFromFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(fields), null, "monthDayFromFields should be called with null-prototype fields object");
+        return super.monthDayFromFields(fields, options);
+      }
+    }
+
+    return new CalendarCheckFieldsPrototypePollution();
+  },
+
   /*
    * A custom calendar used in prototype pollution checks. Verifies that methods
    * are always called with a null-prototype options object.

test/built-ins/Temporal/Calendar/prototype/dateAdd/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 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: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.dateAdd(arg, new Temporal.Duration());
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/dateUntil/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2022 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: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg1 = { year: 2000, month: 5, day: 2, calendar };
+const arg2 = new Temporal.PlainDate(1977, 11, 19);
+
+instance.dateUntil(arg1, arg2);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (first argument)");
+
+calendar.dateFromFieldsCallCount = 0;
+
+instance.dateUntil(arg2, arg1);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (second argument)");

test/built-ins/Temporal/Calendar/prototype/day/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 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: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.day(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/dayOfWeek/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 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: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.dayOfWeek(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/dayOfYear/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 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: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.dayOfYear(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/daysInMonth/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 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: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.daysInMonth(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/daysInWeek/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.daysinweek
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.daysInWeek(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/daysInYear/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.daysinyear
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.daysInYear(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/inLeapYear/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.inleapyear
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.inLeapYear(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/month/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.month
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.month(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/monthCode/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.monthcode
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.monthCode(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/monthsInYear/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.monthsinyear
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.monthsInYear(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/weekOfYear/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.weekofyear
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.weekOfYear(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Calendar/prototype/year/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.year
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.year(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Duration/prototype/add/relativeto-propertybag-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.duration.prototype.add
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Duration(1, 0, 0, 1);
+const relativeTo = { year: 2000, month: 5, day: 2, calendar };
+instance.add(new Temporal.Duration(0, 0, 0, 0, -24), { relativeTo });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Duration/prototype/round/relativeto-propertybag-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.duration.prototype.round
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Duration(1, 0, 0, 0, 24);
+const relativeTo = { year: 2000, month: 5, day: 2, calendar };
+instance.round({ largestUnit: "years", relativeTo });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Duration/prototype/subtract/relativeto-propertybag-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.duration.prototype.subtract
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Duration(1, 0, 0, 1);
+const relativeTo = { year: 2000, month: 5, day: 2, calendar };
+instance.subtract(new Temporal.Duration(0, 0, 0, 0, 24), { relativeTo });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/Duration/prototype/total/relativeto-propertybag-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.duration.prototype.total
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Duration(1, 0, 0, 0, 24);
+const relativeTo = { year: 2000, month: 5, day: 2, calendar };
+instance.total({ unit: "days", relativeTo });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDate/compare/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.compare
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const arg1 = { year: 2000, month: 5, day: 2, calendar };
+const arg2 = new Temporal.PlainDate(1976, 11, 18);
+
+Temporal.PlainDate.compare(arg1, arg2);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (first argument)");
+
+calendar.dateFromFieldsCallCount = 0;
+
+Temporal.PlainDate.compare(arg2, arg1);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (first argument)");

test/built-ins/Temporal/PlainDate/from/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.from
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const arg = { year: 2000, month: 5, day: 2, calendar };
+Temporal.PlainDate.from(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDate/prototype/equals/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.equals
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDate(2000, 5, 2);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.equals(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDate/prototype/since/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.since
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDate(2000, 5, 2);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.since(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDate/prototype/toPlainMonthDay/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.toplainmonthday
+description: >
+    Calendar.monthDayFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDate(2000, 5, 2, calendar);
+instance.toPlainMonthDay();
+assert.sameValue(calendar.monthDayFromFieldsCallCount, 1, "monthDayFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainDate/prototype/toPlainYearMonth/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.toplainyearmonth
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDate(2000, 5, 2, calendar);
+instance.toPlainYearMonth();
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainDate/prototype/until/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.until
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDate(2000, 5, 2);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.until(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDate/prototype/with/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.with
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDate(2000, 5, 2, calendar);
+instance.with({ day: 24 });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainDateTime/compare/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.compare
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const arg1 = { year: 2000, month: 5, day: 2, calendar };
+const arg2 = new Temporal.PlainDateTime(1976, 11, 18);
+
+Temporal.PlainDateTime.compare(arg1, arg2);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (first argument)");
+
+calendar.dateFromFieldsCallCount = 0;
+
+Temporal.PlainDateTime.compare(arg2, arg1);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (second argument)");

test/built-ins/Temporal/PlainDateTime/from/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.from
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const arg = { year: 2000, month: 5, day: 2, calendar };
+Temporal.PlainDateTime.from(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDateTime/prototype/equals/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.equals
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.equals(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDateTime/prototype/since/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.since
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.since(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDateTime/prototype/toPlainMonthDay/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.toplainmonthday
+description: >
+    Calendar.monthDayFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321, calendar);
+instance.toPlainMonthDay();
+assert.sameValue(calendar.monthDayFromFieldsCallCount, 1, "monthDayFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainDateTime/prototype/toPlainYearMonth/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.toplainyearmonth
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321, calendar);
+instance.toPlainYearMonth();
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainDateTime/prototype/until/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.until
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.until(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainDateTime/prototype/with/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.with
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321, calendar);
+instance.with({ day: 24 });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainDateTime/prototype/withPlainDate/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.withplaindate
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.withPlainDate(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainMonthDay/from/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainmonthday.from
+description: >
+    Calendar.monthDayFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const arg = { monthCode: "M05", day: 2, calendar };
+Temporal.PlainMonthDay.from(arg);
+assert.sameValue(calendar.monthDayFromFieldsCallCount, 1, "monthDayFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainMonthDay/prototype/equals/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainmonthday.prototype.equals
+description: >
+    Calendar.monthDayFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainMonthDay(5, 2);
+const arg = { monthCode: "M05", day: 2, calendar };
+instance.equals(arg);
+assert.sameValue(calendar.monthDayFromFieldsCallCount, 1, "monthDayFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainMonthDay/prototype/toPlainDate/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainmonthday.prototype.toplaindate
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainMonthDay(5, 2, calendar);
+instance.toPlainDate({ year: 2019 });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainMonthDay/prototype/with/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainmonthday.prototype.with
+description: >
+    Calendar.monthDayFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainMonthDay(5, 2, calendar);
+instance.with({ day: 24 });
+assert.sameValue(calendar.monthDayFromFieldsCallCount, 1, "monthDayFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainTime/prototype/toPlainDateTime/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaintime.prototype.toplaindatetime
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainTime(12, 34, 56, 987, 654, 321);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.toPlainDateTime(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainTime/prototype/toZonedDateTime/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaintime.prototype.tozoneddatetime
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainTime(12, 34, 56, 987, 654, 321);
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.toZonedDateTime({ plainDate: arg, timeZone: "UTC" });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainYearMonth/compare/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.compare
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const arg1 = { year: 2000, month: 5, calendar };
+const arg2 = new Temporal.PlainYearMonth(2019, 6);
+
+Temporal.PlainYearMonth.compare(arg1, arg2);
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should be called on the property bag's calendar (first argument)");
+
+calendar.yearMonthFromFieldsCallCount = 0;
+
+Temporal.PlainYearMonth.compare(arg2, arg1);
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should be called on the property bag's calendar (second argument)");

test/built-ins/Temporal/PlainYearMonth/from/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.from
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const arg = { year: 2000, month: 5, calendar };
+Temporal.PlainYearMonth.from(arg);
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/add/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.add
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5, calendar);
+instance.add(new Temporal.Duration(1));
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should have been called on the calendar");
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/equals/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.equals
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5);
+const arg = { year: 2000, month: 5, calendar };
+instance.equals(arg);
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/since/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.since
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5);
+const arg = { year: 2000, month: 5, calendar };
+instance.since(arg);
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/since/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.since
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5, calendar);
+instance.since(new Temporal.PlainYearMonth(2019, 2));
+assert.sameValue(calendar.dateFromFieldsCallCount, 2, "dateFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/subtract/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.subtract
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5, calendar);
+instance.subtract(new Temporal.Duration(1));
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should have been called on the calendar");
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.toplaindate
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5, calendar);
+instance.toPlainDate({ day: 24 });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/until/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.until
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5);
+const arg = { year: 2000, month: 5, calendar };
+instance.until(arg);
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/until/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.until
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5, calendar);
+instance.until(new Temporal.PlainYearMonth(2019, 2));
+assert.sameValue(calendar.dateFromFieldsCallCount, 2, "dateFromFields should have been called on the calendar");

test/built-ins/Temporal/PlainYearMonth/prototype/with/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.with
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.PlainYearMonth(2000, 5, calendar);
+instance.with({ year: 2019 });
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should have been called on the calendar");

test/built-ins/Temporal/TimeZone/prototype/getInstantFor/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.timezone.prototype.getinstantfor
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.TimeZone("UTC");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.getInstantFor(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/TimeZone/prototype/getPossibleInstantsFor/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.timezone.prototype.getpossibleinstantsfor
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.TimeZone("UTC");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.getPossibleInstantsFor(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/ZonedDateTime/compare/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.compare
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const timeZone = new Temporal.TimeZone("UTC");
+const arg1 = { year: 2000, month: 5, day: 2, timeZone, calendar };
+const arg2 = new Temporal.ZonedDateTime(1_000_000_000_000_000_000n, timeZone);
+
+Temporal.ZonedDateTime.compare(arg1, arg2);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (first argument)");
+
+calendar.dateFromFieldsCallCount = 0;
+
+Temporal.ZonedDateTime.compare(arg2, arg1);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar (first argument)");

test/built-ins/Temporal/ZonedDateTime/from/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.from
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const timeZone = new Temporal.TimeZone("UTC");
+const arg = { year: 2000, month: 5, day: 2, timeZone, calendar };
+Temporal.ZonedDateTime.from(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/ZonedDateTime/prototype/equals/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.equals
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const timeZone = new Temporal.TimeZone("UTC");
+const instance = new Temporal.ZonedDateTime(0n, timeZone);
+const arg = { year: 2000, month: 5, day: 2, timeZone, calendar };
+instance.equals(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/ZonedDateTime/prototype/since/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.since
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const timeZone = new Temporal.TimeZone("UTC");
+const instance = new Temporal.ZonedDateTime(0n, timeZone);
+const arg = { year: 2000, month: 5, day: 2, timeZone, calendar };
+instance.since(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/ZonedDateTime/prototype/toPlainMonthDay/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.toplainmonthday
+description: >
+    Calendar.monthDayFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.ZonedDateTime(0n, "UTC", calendar);
+instance.toPlainMonthDay();
+assert.sameValue(calendar.monthDayFromFieldsCallCount, 1, "monthDayFromFields should have been called on the calendar");

test/built-ins/Temporal/ZonedDateTime/prototype/toPlainYearMonth/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.toplainyearmonth
+description: >
+    Calendar.yearMonthFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.ZonedDateTime(0n, "UTC", calendar);
+instance.toPlainYearMonth();
+assert.sameValue(calendar.yearMonthFromFieldsCallCount, 1, "yearMonthFromFields should have been called on the calendar");

test/built-ins/Temporal/ZonedDateTime/prototype/until/calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.until
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const timeZone = new Temporal.TimeZone("UTC");
+const instance = new Temporal.ZonedDateTime(0n, timeZone);
+const arg = { year: 2000, month: 5, day: 2, timeZone, calendar };
+instance.until(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/built-ins/Temporal/ZonedDateTime/prototype/with/calendar-fromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.with
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.ZonedDateTime(0n, "UTC", calendar);
+instance.with({ day: 24 });
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should have been called on the calendar");

test/built-ins/Temporal/ZonedDateTime/prototype/withPlainDate/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.withplaindate
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.ZonedDateTime(1_000_000_000_000_000_000n, "UTC");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.withPlainDate(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/intl402/Temporal/Calendar/prototype/era/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.era
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.era(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");

test/intl402/Temporal/Calendar/prototype/eraYear/argument-calendar-datefromfields-called-with-null-prototype-fields.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.erayear
+description: >
+    Calendar.dateFromFields method is called with a null-prototype fields object
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = TemporalHelpers.calendarCheckFieldsPrototypePollution();
+const instance = new Temporal.Calendar("iso8601");
+const arg = { year: 2000, month: 5, day: 2, calendar };
+instance.eraYear(arg);
+assert.sameValue(calendar.dateFromFieldsCallCount, 1, "dateFromFields should be called on the property bag's calendar");