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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /testing/web-platform/tests/webidl/ecmascript-binding/class-string-interface.any.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/webidl/ecmascript-binding/class-string-interface.any.js')
-rw-r--r-- | testing/web-platform/tests/webidl/ecmascript-binding/class-string-interface.any.js | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webidl/ecmascript-binding/class-string-interface.any.js b/testing/web-platform/tests/webidl/ecmascript-binding/class-string-interface.any.js new file mode 100644 index 0000000000..ee792d5368 --- /dev/null +++ b/testing/web-platform/tests/webidl/ecmascript-binding/class-string-interface.any.js @@ -0,0 +1,62 @@ +"use strict"; + +test(() => { + assert_own_property(Blob.prototype, Symbol.toStringTag); + + const propDesc = Object.getOwnPropertyDescriptor(Blob.prototype, Symbol.toStringTag); + assert_equals(propDesc.value, "Blob", "value"); + assert_equals(propDesc.configurable, true, "configurable"); + assert_equals(propDesc.enumerable, false, "enumerable"); + assert_equals(propDesc.writable, false, "writable"); +}, "@@toStringTag exists on the prototype with the appropriate descriptor"); + +test(() => { + assert_not_own_property(new Blob(), Symbol.toStringTag); +}, "@@toStringTag must not exist on the instance"); + +test(() => { + assert_equals(Object.prototype.toString.call(Blob.prototype), "[object Blob]"); +}, "Object.prototype.toString applied to the prototype"); + +test(() => { + assert_equals(Object.prototype.toString.call(new Blob()), "[object Blob]"); +}, "Object.prototype.toString applied to an instance"); + +test(t => { + assert_own_property(Blob.prototype, Symbol.toStringTag, "Precondition for this test: @@toStringTag on the prototype"); + + t.add_cleanup(() => { + Object.defineProperty(Blob.prototype, Symbol.toStringTag, { value: "Blob" }); + }); + + Object.defineProperty(Blob.prototype, Symbol.toStringTag, { value: "NotABlob" }); + assert_equals(Object.prototype.toString.call(Blob.prototype), "[object NotABlob]", "prototype"); + assert_equals(Object.prototype.toString.call(new Blob()), "[object NotABlob]", "instance"); +}, "Object.prototype.toString applied after modifying the prototype's @@toStringTag"); + +test(t => { + const instance = new Blob(); + assert_not_own_property(instance, Symbol.toStringTag, "Precondition for this test: no @@toStringTag on the instance"); + + Object.defineProperty(instance, Symbol.toStringTag, { value: "NotABlob" }); + assert_equals(Object.prototype.toString.call(instance), "[object NotABlob]"); +}, "Object.prototype.toString applied to the instance after modifying the instance's @@toStringTag"); + +// Chrome had a bug (https://bugs.chromium.org/p/chromium/issues/detail?id=793406) where if there +// was no @@toStringTag in the prototype, it would fall back to a magic class string. This tests +// that the bug is fixed. + +test(() => { + const instance = new Blob(); + Object.setPrototypeOf(instance, null); + + assert_equals(Object.prototype.toString.call(instance), "[object Object]"); +}, "Object.prototype.toString applied to a null-prototype instance"); + +// This test must be last. +test(() => { + delete Blob.prototype[Symbol.toStringTag]; + + assert_equals(Object.prototype.toString.call(Blob.prototype), "[object Object]", "prototype"); + assert_equals(Object.prototype.toString.call(new Blob()), "[object Object]", "instance"); +}, "Object.prototype.toString applied after deleting @@toStringTag"); |