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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/webidl/ecmascript-binding/has-instance.html | |
| parent | Initial commit. (diff) | |
| download | firefox-upstream.tar.xz firefox-upstream.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/webidl/ecmascript-binding/has-instance.html')
| -rw-r--r-- | testing/web-platform/tests/webidl/ecmascript-binding/has-instance.html | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webidl/ecmascript-binding/has-instance.html b/testing/web-platform/tests/webidl/ecmascript-binding/has-instance.html new file mode 100644 index 0000000000..caf0be4729 --- /dev/null +++ b/testing/web-platform/tests/webidl/ecmascript-binding/has-instance.html @@ -0,0 +1,26 @@ +<!doctype html> +<meta charset="utf-8"> +<title>instanceof behavior</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> + +<iframe></iframe> + +<script> +test(function() { + var obj = Object.create(Element.prototype); + assert_true(obj instanceof Element); + assert_true(obj instanceof Node); + assert_false(obj instanceof Attr); +}, "Manually-constructed prototype chains are correctly handled by instanceof"); + +test(() => { + // This tests that the historical override of [[HasInstance]] was removed: + // https://github.com/heycam/webidl/pull/356 + assert_false(document.body instanceof frames[0].Element); +}, "instanceof must return false across different globals, for platform objects"); + +test(() => { + assert_false(EventTarget.hasOwnProperty(Symbol.hasInstance)); +}, "platform objects do not have Symbol.hasInstance installed"); +</script> |