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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/PrivateName/modify-non-extensible.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/PrivateName/modify-non-extensible.js | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/js/src/tests/non262/PrivateName/modify-non-extensible.js b/js/src/tests/non262/PrivateName/modify-non-extensible.js new file mode 100644 index 0000000000..7e9af31895 --- /dev/null +++ b/js/src/tests/non262/PrivateName/modify-non-extensible.js @@ -0,0 +1,75 @@ +// |reftest| + +// Returns the argument in the constructor to allow stamping private fields into +// arbitrary objects. +class OverrideBase { + constructor(o) { + return o; + } +}; + +class A extends OverrideBase { + #a = 1; + g() { + return this.#a + } + + static gs(o) { + return o.#a; + } + static inca(obj) { + obj.#a++; + } +} + +var obj = {}; +Object.seal(obj); +new A(obj); // Add #a to obj, but not g. +assertEq('g' in obj, false); +assertEq(A.gs(obj), 1); +A.inca(obj); +assertEq(A.gs(obj), 2); + +// Ensure that the object remains non-extensible +obj.h = 'hi' +assertEq('h' in obj, false); + + +Object.freeze(obj); +A.inca(obj); // Despite being frozen, private names are modifiable. +assertEq(A.gs(obj), 3); +assertEq(Object.isFrozen(obj), true); + +var proxy = new Proxy({}, {}); +assertEq(Object.isFrozen(proxy), false); + +new A(proxy); +assertEq(A.gs(proxy), 1); + +// Note: this doesn't exercise the non-native object +// path in TestIntegrityLevel like you might expect. +// +// For that see below. +Object.freeze(proxy); +assertEq(Object.isFrozen(proxy), true); + +A.inca(proxy); +assertEq(A.gs(proxy), 2) + +var target = { a: 10 }; +Object.freeze(target); +new A(target); +assertEq(Object.isFrozen(target), true) + +var getOwnKeys = []; +var proxy = new Proxy(target, { + getOwnPropertyDescriptor: function (target, key) { + getOwnKeys.push(key); + return Reflect.getOwnPropertyDescriptor(target, key); + }, +}); + +Object.isFrozen(proxy); +assertEq(getOwnKeys.length, 1); + +if (typeof reportCompare === 'function') reportCompare(0, 0); |