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fast-check

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Property based testing framework for JavaScript (like QuickCheck)

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import { PreconditionFailure } from '../precondition/PreconditionFailure.js'; function interruptAfter(timeMs, setTimeoutSafe, clearTimeoutSafe) { let timeoutHandle = null; const promise = new Promise((resolve) => { timeoutHandle = setTimeoutSafe(() => { const preconditionFailure = new PreconditionFailure(true); resolve(preconditionFailure); }, timeMs); }); return { clear: () => clearTimeoutSafe(timeoutHandle), promise, }; } export class SkipAfterProperty { constructor(property, getTime, timeLimit, interruptExecution, setTimeoutSafe, clearTimeoutSafe) { this.property = property; this.getTime = getTime; this.interruptExecution = interruptExecution; this.setTimeoutSafe = setTimeoutSafe; this.clearTimeoutSafe = clearTimeoutSafe; this.skipAfterTime = this.getTime() + timeLimit; } isAsync() { return this.property.isAsync(); } generate(mrng, runId) { return this.property.generate(mrng, runId); } shrink(value) { return this.property.shrink(value); } run(v) { const remainingTime = this.skipAfterTime - this.getTime(); if (remainingTime <= 0) { const preconditionFailure = new PreconditionFailure(this.interruptExecution); if (this.isAsync()) { return Promise.resolve(preconditionFailure); } else { return preconditionFailure; } } if (this.interruptExecution && this.isAsync()) { const t = interruptAfter(remainingTime, this.setTimeoutSafe, this.clearTimeoutSafe); const propRun = Promise.race([this.property.run(v), t.promise]); propRun.then(t.clear, t.clear); return propRun; } return this.property.run(v); } runBeforeEach() { return this.property.runBeforeEach(); } runAfterEach() { return this.property.runAfterEach(); } }