43 lines
1.0 KiB
JavaScript
43 lines
1.0 KiB
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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function shouldThrow(func, errorMessage) {
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var errorThrown = false;
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var error = null;
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try {
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func();
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} catch (e) {
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errorThrown = true;
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error = e;
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}
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if (!errorThrown)
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throw new Error('not thrown');
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if (String(error) !== errorMessage)
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throw new Error(`bad error: ${String(error)}`);
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}
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class Thenable {
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constructor(promise)
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{
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this.promise = promise;
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}
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then(fulfill, rejected)
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{
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return new Thenable(this.promise.then(fulfill, rejected));
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}
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};
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var fulfilled = new Thenable(Promise.reject(0));
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var rejected = new Thenable(Promise.resolve(42));
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var counter = 0;
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Promise.prototype.finally.call(fulfilled, function () { counter++; });
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Promise.prototype.finally.call(rejected, function () { counter++; });
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drainMicrotasks();
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shouldBe(counter, 2);
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shouldThrow(() => Promise.prototype.finally.call(32), `TypeError: |this| is not an object`);
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