95 lines
1.9 KiB
JavaScript
95 lines
1.9 KiB
JavaScript
'use strict';
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const beforeExitSubscribers = new Set();
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const beforeExitHandler = () => {
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for (const subscriber of beforeExitSubscribers) {
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subscriber();
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}
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};
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const onBeforeExit = subscriber => {
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if (beforeExitSubscribers.size === 0) {
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// Only listen for the event once, no matter how many Sequences are run
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// concurrently.
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process.on('beforeExit', beforeExitHandler);
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}
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beforeExitSubscribers.add(subscriber);
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return {
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dispose() {
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beforeExitSubscribers.delete(subscriber);
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if (beforeExitSubscribers.size === 0) {
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process.removeListener('beforeExit', beforeExitHandler);
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}
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}
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};
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};
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class Sequence {
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constructor(runnables, bail) {
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if (!Array.isArray(runnables)) {
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throw new TypeError('Expected an array of runnables');
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}
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this.runnables = runnables;
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this.bail = bail || false;
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}
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run() {
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const iterator = this.runnables[Symbol.iterator]();
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let activeRunnable;
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const beforeExit = onBeforeExit(() => {
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if (activeRunnable.finishDueToInactivity) {
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activeRunnable.finishDueToInactivity();
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}
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});
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let allPassed = true;
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const finish = () => {
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beforeExit.dispose();
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return allPassed;
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};
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const runNext = () => {
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let promise;
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for (let next = iterator.next(); !next.done; next = iterator.next()) {
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activeRunnable = next.value;
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const passedOrPromise = activeRunnable.run();
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if (!passedOrPromise) {
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allPassed = false;
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if (this.bail) {
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// Stop if the test failed and bail mode is on.
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break;
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}
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} else if (passedOrPromise !== true) {
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promise = passedOrPromise;
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break;
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}
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}
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if (!promise) {
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return finish();
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}
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return promise.then(passed => {
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if (!passed) {
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allPassed = false;
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if (this.bail) {
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// Stop if the test failed and bail mode is on.
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return finish();
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}
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}
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return runNext();
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});
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};
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return runNext();
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}
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}
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module.exports = Sequence;
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