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4f2e372716
Export a new common.noop no-operation function for general use. Allow using common.mustCall() without a fn argument to simplify test cases. Replace various non-op functions throughout tests with common.noop PR-URL: https://github.com/nodejs/node/pull/12027 Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com> Reviewed-By: Teddy Katz <teddy.katz@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
71 lines
1.9 KiB
JavaScript
71 lines
1.9 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 Readable = require('stream').Readable;
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const readable = new Readable({
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read: common.noop
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});
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// Initialized to false.
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assert.strictEqual(readable._readableState.emittedReadable, false);
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readable.on('readable', common.mustCall(() => {
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// emittedReadable should be true when the readable event is emitted
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assert.strictEqual(readable._readableState.emittedReadable, true);
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readable.read();
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// emittedReadable is reset to false during read()
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assert.strictEqual(readable._readableState.emittedReadable, false);
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}, 4));
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// When the first readable listener is just attached,
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// emittedReadable should be false
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assert.strictEqual(readable._readableState.emittedReadable, false);
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// Each one of these should trigger a readable event.
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process.nextTick(common.mustCall(() => {
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readable.push('foo');
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}));
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process.nextTick(common.mustCall(() => {
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readable.push('bar');
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}));
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process.nextTick(common.mustCall(() => {
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readable.push('quo');
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}));
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process.nextTick(common.mustCall(() => {
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readable.push(null);
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}));
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const noRead = new Readable({
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read: common.noop
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});
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noRead.on('readable', common.mustCall(() => {
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// emittedReadable should be true when the readable event is emitted
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assert.strictEqual(noRead._readableState.emittedReadable, true);
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noRead.read(0);
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// emittedReadable is not reset during read(0)
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assert.strictEqual(noRead._readableState.emittedReadable, true);
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}));
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noRead.push('foo');
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noRead.push(null);
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const flowing = new Readable({
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read: common.noop
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});
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flowing.on('data', common.mustCall(() => {
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// When in flowing mode, emittedReadable is always false.
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assert.strictEqual(flowing._readableState.emittedReadable, false);
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flowing.read();
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assert.strictEqual(flowing._readableState.emittedReadable, false);
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}, 3));
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flowing.push('foooo');
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flowing.push('bar');
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flowing.push('quo');
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process.nextTick(common.mustCall(() => {
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flowing.push(null);
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}));
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