Expand some Duration#toString() tests.

test/built-ins/Temporal/Duration/prototype/toString/balance.js

@@ -0,0 +1,24 @@
+// 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.tostring
+description: Verify that values are balanced correctly.
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  Temporal.Duration.from({ milliseconds: 3500 }).toString(),
+  "PT3.5S");
+assert.sameValue(
+  Temporal.Duration.from({ microseconds: 3500 }).toString(),
+  "PT0.0035S");
+assert.sameValue(
+  Temporal.Duration.from({ nanoseconds: 3500 }).toString(),
+  "PT0.0000035S");
+assert.sameValue(
+  new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 1111, 1111, 1111).toString(),
+  "PT1.112112111S");
+assert.sameValue(
+  Temporal.Duration.from({ seconds: 120, milliseconds: 3500 }).toString(),
+  "PT123.5S");

test/built-ins/Temporal/Duration/prototype/toString/fractionalseconddigits-invalid-string.js

@@ -16,4 +16,6 @@ features: [Temporal]
 
 const duration = new Temporal.Duration(1, 2, 3, 4, 5, 6, 7, 987, 650, 0);
 
-assert.throws(RangeError, () => duration.toString({ fractionalSecondDigits: "other string" }));
+for (const fractionalSecondDigits of ["other string", "AUTO", "not-auto", "autos"]) {
+  assert.throws(RangeError, () => duration.toString({ fractionalSecondDigits }));
+}

test/built-ins/Temporal/Duration/prototype/toString/fractionalseconddigits-out-of-range.js

@@ -16,5 +16,7 @@ features: [Temporal]
 
 const duration = new Temporal.Duration(1, 2, 3, 4, 5, 6, 7, 987, 650, 0);
 
+assert.throws(RangeError, () => duration.toString({ fractionalSecondDigits: -Infinity }));
 assert.throws(RangeError, () => duration.toString({ fractionalSecondDigits: -1 }));
 assert.throws(RangeError, () => duration.toString({ fractionalSecondDigits: 10 }));
+assert.throws(RangeError, () => duration.toString({ fractionalSecondDigits: Infinity }));

test/built-ins/Temporal/Duration/prototype/toString/negative-components.js

@@ -6,6 +6,33 @@ esid: sec-temporal.duration.prototype.tostring
 description: Temporal.Duration.toString handles negative components
 features: [Temporal]
 ---*/
-const d = new Temporal.Duration(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
-const expected = "-P1Y1M1W1DT1H1M1.001001001S";
-assert.sameValue(d.toString(), expected, "toString with negative components");
+assert.sameValue(
+  new Temporal.Duration(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1).toString(),
+  "-P1Y1M1W1DT1H1M1.001001001S");
+assert.sameValue(
+  Temporal.Duration.from({ milliseconds: -250 }).toString(),
+  "-PT0.25S");
+assert.sameValue(
+  Temporal.Duration.from({ milliseconds: -3500 }).toString(),
+  "-PT3.5S");
+assert.sameValue(
+  Temporal.Duration.from({ microseconds: -250 }).toString(),
+  "-PT0.00025S");
+assert.sameValue(
+  Temporal.Duration.from({ microseconds: -3500 }).toString(),
+  "-PT0.0035S");
+assert.sameValue(
+  Temporal.Duration.from({ nanoseconds: -250 }).toString(),
+  "-PT0.00000025S");
+assert.sameValue(
+  Temporal.Duration.from({ nanoseconds: -3500 }).toString(),
+  "-PT0.0000035S");
+assert.sameValue(
+  new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, -1111, -1111, -1111).toString(),
+  "-PT1.112112111S");
+assert.sameValue(
+  Temporal.Duration.from({ seconds: -120, milliseconds: -3500 }).toString(),
+  "-PT123.5S");
+assert.sameValue(
+  Temporal.Duration.from({ weeks: -1, days: -1 }).toString(),
+  "-P1W1D");

test/built-ins/Temporal/Duration/prototype/toString/roundingmode-invalid-string.js

@@ -8,4 +8,6 @@ features: [Temporal]
 ---*/
 
 const duration = new Temporal.Duration(0, 0, 0, 0, 12, 34, 56, 123, 987, 500);
-assert.throws(RangeError, () => duration.toString({ smallestUnit: "microsecond", roundingMode: "other string" }));
+for (const roundingMode of ["other string", "cile", "CEIL", "ce\u0131l", "auto"]) {
+  assert.throws(RangeError, () => duration.toString({ smallestUnit: "microsecond", roundingMode }));
+}

test/built-ins/Temporal/Duration/prototype/toString/smallestunit-invalid-string.js

@@ -8,4 +8,7 @@ features: [Temporal]
 ---*/
 
 const duration = new Temporal.Duration(0, 0, 0, 0, 12, 34, 56, 123, 987, 500);
-assert.throws(RangeError, () => duration.toString({ smallestUnit: "other string" }));
+const values = ["eras", "years", "months", "weeks", "days", "hours", "minutes", "nonsense", "other string", "mill\u0131seconds", "SECONDS"];
+for (const smallestUnit of values) {
+  assert.throws(RangeError, () => duration.toString({ smallestUnit }));
+}