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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/class/superPropDelete.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/class/superPropDelete.js | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/js/src/tests/non262/class/superPropDelete.js b/js/src/tests/non262/class/superPropDelete.js new file mode 100644 index 0000000000..e0b71613ea --- /dev/null +++ b/js/src/tests/non262/class/superPropDelete.js @@ -0,0 +1,64 @@ +// Make sure we get the proper side effects. +// |delete super.prop| and |delete super[expr]| throw universally. + +class base { + constructor() { } +} + +class derived extends base { + constructor() { super(); } + testDeleteProp() { delete super.prop; } + testDeleteElem() { + let sideEffect = 0; + assertThrowsInstanceOf(() => delete super[sideEffect = 1], ReferenceError); + assertEq(sideEffect, 1); + } + testDeleteElemPropValFirst() { + // The deletion error is a reference error, but by munging the prototype + // chain, we can force a typeerror from JSOP_SUPERBASE + delete super[Object.setPrototypeOf(derived.prototype, null)]; + } +} + +var d = new derived(); +assertThrowsInstanceOf(() => d.testDeleteProp(), ReferenceError); +d.testDeleteElem(); +assertThrowsInstanceOf(() => d.testDeleteElemPropValFirst(), TypeError); + +// |delete super.x| does not delete anything before throwing. +var thing1 = { + go() { delete super.toString; } +}; +let saved = Object.prototype.toString; +assertThrowsInstanceOf(() => thing1.go(), ReferenceError); +assertEq(Object.prototype.toString, saved); + +// |delete super.x| does not tell the prototype to delete anything, when it's a proxy. +var thing2 = { + go() { delete super.prop; } +}; +Object.setPrototypeOf(thing2, new Proxy({}, { + deleteProperty(x) { throw "FAIL"; } +})); +assertThrowsInstanceOf(() => thing2.go(), ReferenceError); + +class derivedTestDeleteProp extends base { + constructor() { + // The deletion error is a reference error, even after munging the prototype + // chain. + Object.setPrototypeOf(derivedTestDeleteProp.prototype, null); + + assertThrowsInstanceOf(() => delete super.prop, ReferenceError); + + super(); + + assertThrowsInstanceOf(() => delete super.prop, ReferenceError); + + return {}; + } +} + +new derivedTestDeleteProp(); + +if (typeof reportCompare === 'function') + reportCompare(0,0,"OK"); |