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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/generators/construct-newtarget.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/generators/construct-newtarget.js | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/js/src/tests/non262/generators/construct-newtarget.js b/js/src/tests/non262/generators/construct-newtarget.js new file mode 100644 index 0000000000..f2087852b0 --- /dev/null +++ b/js/src/tests/non262/generators/construct-newtarget.js @@ -0,0 +1,79 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +const GeneratorFunction = function*(){}.constructor; + + +// Test subclassing %GeneratorFunction% works correctly. +class MyGenerator extends GeneratorFunction {} + +var fn = new MyGenerator(); +assertEq(fn instanceof MyGenerator, true); +assertEq(fn instanceof GeneratorFunction, true); +assertEq(Object.getPrototypeOf(fn), MyGenerator.prototype); + +fn = Reflect.construct(MyGenerator, []); +assertEq(fn instanceof MyGenerator, true); +assertEq(fn instanceof GeneratorFunction, true); +assertEq(Object.getPrototypeOf(fn), MyGenerator.prototype); + +fn = Reflect.construct(MyGenerator, [], MyGenerator); +assertEq(fn instanceof MyGenerator, true); +assertEq(fn instanceof GeneratorFunction, true); +assertEq(Object.getPrototypeOf(fn), MyGenerator.prototype); + +fn = Reflect.construct(MyGenerator, [], GeneratorFunction); +assertEq(fn instanceof MyGenerator, false); +assertEq(fn instanceof GeneratorFunction, true); +assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype); + + +// Set a different constructor as NewTarget. +fn = Reflect.construct(MyGenerator, [], Array); +assertEq(fn instanceof MyGenerator, false); +assertEq(fn instanceof GeneratorFunction, false); +assertEq(Object.getPrototypeOf(fn), Array.prototype); + +fn = Reflect.construct(GeneratorFunction, [], Array); +assertEq(fn instanceof GeneratorFunction, false); +assertEq(Object.getPrototypeOf(fn), Array.prototype); + + +// The prototype defaults to %GeneratorFunctionPrototype% if null. +function NewTargetNullPrototype() {} +NewTargetNullPrototype.prototype = null; + +fn = Reflect.construct(GeneratorFunction, [], NewTargetNullPrototype); +assertEq(fn instanceof GeneratorFunction, true); +assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype); + +fn = Reflect.construct(MyGenerator, [], NewTargetNullPrototype); +assertEq(fn instanceof MyGenerator, false); +assertEq(fn instanceof GeneratorFunction, true); +assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype); + + +// "prototype" property is retrieved exactly once. +var trapLog = [], getLog = []; +var ProxiedConstructor = new Proxy(GeneratorFunction, new Proxy({ + get(target, propertyKey, receiver) { + getLog.push(propertyKey); + return Reflect.get(target, propertyKey, receiver); + } +}, { + get(target, propertyKey, receiver) { + trapLog.push(propertyKey); + return Reflect.get(target, propertyKey, receiver); + } +})); + +fn = Reflect.construct(GeneratorFunction, [], ProxiedConstructor); +assertEqArray(trapLog, ["get"]); +assertEqArray(getLog, ["prototype"]); +assertEq(fn instanceof GeneratorFunction, true); +assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype); + + +if (typeof reportCompare === "function") + reportCompare(0, 0); |