mirror of https://gitee.com/openkylin/nodejs.git
42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const immediate = setImmediate(() => {});
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assert.strictEqual(immediate.hasRef(), true);
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immediate.unref();
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assert.strictEqual(immediate.hasRef(), false);
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clearImmediate(immediate);
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// This immediate should execute as it was unrefed and refed again.
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// It also confirms that unref/ref are chainable.
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setImmediate(common.mustCall(firstStep)).ref().unref().unref().ref();
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function firstStep() {
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// Unrefed setImmediate executes if it was unrefed but something else keeps
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// the loop open
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setImmediate(common.mustCall()).unref();
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setTimeout(common.mustCall(() => { setImmediate(secondStep); }), 0);
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}
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function secondStep() {
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// clearImmediate works just fine with unref'd immediates
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const immA = setImmediate(() => {
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clearImmediate(immA);
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clearImmediate(immB);
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// This should not keep the event loop open indefinitely
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// or do anything else weird
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immA.ref();
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immB.ref();
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}).unref();
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const immB = setImmediate(common.mustNotCall()).unref();
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setImmediate(common.mustCall(finalStep));
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}
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function finalStep() {
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// This immediate should not execute as it was unrefed
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// and nothing else is keeping the event loop alive
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setImmediate(common.mustNotCall()).unref();
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}
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