14 lines
376 B
JavaScript
14 lines
376 B
JavaScript
function shouldBe(actual, expected) {
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if (actual !== expected)
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throw new Error('bad value: ' + actual);
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}
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class DerivedPromise extends Promise {
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static get [Symbol.species]() {
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return Promise;
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}
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}
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shouldBe(DerivedPromise.all([ 1, 2, 3]) instanceof DerivedPromise, true);
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shouldBe(DerivedPromise.race([ 1, 2, 3]) instanceof DerivedPromise, true);
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