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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/tests/non262/Reflect/preventExtensions.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/tests/non262/Reflect/preventExtensions.js')
-rw-r--r-- | js/src/tests/non262/Reflect/preventExtensions.js | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/js/src/tests/non262/Reflect/preventExtensions.js b/js/src/tests/non262/Reflect/preventExtensions.js new file mode 100644 index 0000000000..63ca2545b4 --- /dev/null +++ b/js/src/tests/non262/Reflect/preventExtensions.js @@ -0,0 +1,56 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ + +// Reflect.preventExtensions is the same as Object.preventExtensions, except +// for the return value and the behavior in error cases. + +var someObjects = [ + {}, + new Int32Array(7), + Object(Symbol("table")), + new Proxy({}, {}) +]; + +for (var obj of someObjects) { + assertEq(Reflect.preventExtensions(obj), true); + // [[PreventExtensions]] on an already-inextensible object is a no-op. + assertEq(Reflect.preventExtensions(obj), true); +} + +// Error cases. +assertThrowsInstanceOf(() => Reflect.isExtensible(), TypeError); +for (var value of [undefined, null, true, 1, NaN, "Phaedo", Symbol("good")]) { + assertThrowsInstanceOf(() => Reflect.isExtensible(value), TypeError); +} + +// A proxy's preventExtensions handler can return false without doing anything. +obj = {}; +var proxy = new Proxy(obj, { + preventExtensions() { return false; } +}); +assertEq(Reflect.preventExtensions(proxy), false); +assertEq(Reflect.isExtensible(obj), true); +assertEq(Reflect.isExtensible(proxy), true); + +// If a proxy's preventExtensions handler throws, the exception is propagated. +obj = {}; +proxy = new Proxy(obj, { + preventExtensions() { throw "fit"; } +}); +assertThrowsValue(() => Reflect.preventExtensions(proxy), "fit"); +assertEq(Reflect.isExtensible(obj), true); +assertEq(Reflect.isExtensible(proxy), true); + +// If a proxy's preventExtensions handler returns true while leaving the target +// extensible, that's a TypeError. +obj = {}; +proxy = new Proxy(obj, { + preventExtensions() { return true; } +}); +assertThrowsInstanceOf(() => Reflect.preventExtensions(proxy), TypeError); +assertEq(Reflect.isExtensible(obj), true); +assertEq(Reflect.isExtensible(proxy), true); + +// For more Reflect.preventExtensions tests, see target.js. + +reportCompare(0, 0); |