1 files changed, 50 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/PlainTime/prototype/toString/fractionalseconddigits-wrong-type.js b/js/src/tests/test262/built-ins/Temporal/PlainTime/prototype/toString/fractionalseconddigits-wrong-type.js
new file mode 100644
index 0000000000..ff611b4652
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/PlainTime/prototype/toString/fractionalseconddigits-wrong-type.js
@@ -0,0 +1,50 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// 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.plaintime.prototype.tostring
+description: Type conversions for fractionalSecondDigits option
+info: |
+    sec-getoption steps 8–9:
+      8. Else if _type_ is Number, then
+        a. Set _value_ to ? ToNumber(value).
+        b. ...
+      9. Else,
+        a. Set _value_ to ? ToString(value).
+    sec-getstringornumberoption step 2:
+      2. Let _value_ be ? GetOption(_options_, _property_, « Number, String », *undefined*, _fallback_).
+    sec-temporal-tosecondsstringprecision step 9:
+      9. Let _digits_ be ? GetStringOrNumberOption(_normalizedOptions_, *"fractionalSecondDigits"*, « *"auto"* », 0, 9, *"auto"*).
+    sec-temporal.plaintime.prototype.tostring step 4:
+      4. Let _precision_ be ? ToSecondsStringPrecision(_options_).
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const time = new Temporal.PlainTime(12, 34, 56, 987, 650, 0);
+
+assert.throws(RangeError, () => time.toString({ fractionalSecondDigits: null }),
+  "null is not a number and converts to the string 'null' which is not valid for fractionalSecondDigits");
+assert.throws(RangeError, () => time.toString({ fractionalSecondDigits: true }),
+  "true is not a number and converts to the string 'true' which is not valid for fractionalSecondDigits");
+assert.throws(RangeError, () => time.toString({ fractionalSecondDigits: false }),
+  "false is not a number and converts to the string 'false' which is not valid for fractionalSecondDigits");
+assert.throws(TypeError, () => time.toString({ fractionalSecondDigits: Symbol() }),
+  "symbols are not numbers and cannot convert to strings");
+assert.throws(RangeError, () => time.toString({ fractionalSecondDigits: 2n }),
+  "bigints are not numbers and convert to strings which are not valid for fractionalSecondDigits");
+assert.throws(RangeError, () => time.toString({ fractionalSecondDigits: {} }),
+  "plain objects are not numbers and convert to strings which are not valid for fractionalSecondDigits");
+
+const expected = [
+  "get fractionalSecondDigits.toString",
+  "call fractionalSecondDigits.toString",
+];
+const actual = [];
+const observer = TemporalHelpers.toPrimitiveObserver(actual, "auto", "fractionalSecondDigits");
+const result = time.toString({ fractionalSecondDigits: observer });
+assert.sameValue(result, "12:34:56.98765", "object with toString uses toString return value");
+assert.compareArray(actual, expected, "object with toString calls toString and not valueOf");
+
+reportCompare(0, 0);