diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/tests/non262/TypedArray/from_constructor.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/TypedArray/from_constructor.js | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/from_constructor.js b/js/src/tests/non262/TypedArray/from_constructor.js new file mode 100644 index 0000000000..0b0773b85c --- /dev/null +++ b/js/src/tests/non262/TypedArray/from_constructor.js @@ -0,0 +1,36 @@ +for (var constructor of anyTypedArrayConstructors) { + // Note %TypedArray%.from(iterable) calls 'this' with an argument whose value is + // `[...iterable].length`, while Array.from(iterable) doesn't pass any argument. + constructor.from.call(function(len){ + assertEq(len, 3); + return new constructor(len); + }, Array(3)); + + // If the 'this' value passed to %TypedArray.from is not a constructor, + // then an exception is thrown, while Array.from will use Array as it's constructor. + var arr = [3, 4, 5]; + var nonconstructors = [ + {}, Math, Object.getPrototypeOf, undefined, 17, + () => ({}) // arrow functions are not constructors + ]; + for (var v of nonconstructors) { + assertThrowsInstanceOf(() => { + constructor.from.call(v, arr); + }, TypeError); + } + + // %TypedArray%.from does not get confused if global constructors for typed arrays + // are replaced with another constructor. + function NotArray(...rest) { + return new constructor(...rest); + } + var RealArray = constructor; + NotArray.from = constructor.from; + this[constructor.name] = NotArray; + assertEq(RealArray.from([1]) instanceof RealArray, true); + assertEq(NotArray.from([1]) instanceof RealArray, true); + this[constructor.name] = RealArray; +} + +if (typeof reportCompare === "function") + reportCompare(true, true); |