deno.land / std@0.166.0 / node / _tools / test / parallel / test-stream-readable-emittedReadable.js

test-stream-readable-emittedReadable.js
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// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';const common = require('../common');const assert = require('assert');const Readable = require('stream').Readable;
const readable = new Readable({ read: () => {}});
// Initialized to false.assert.strictEqual(readable._readableState.emittedReadable, false);
const expected = [Buffer.from('foobar'), Buffer.from('quo'), null];readable.on('readable', common.mustCall(() => { // emittedReadable should be true when the readable event is emitted assert.strictEqual(readable._readableState.emittedReadable, true); assert.deepStrictEqual(readable.read(), expected.shift()); // emittedReadable is reset to false during read() assert.strictEqual(readable._readableState.emittedReadable, false);}, 3));
// When the first readable listener is just attached,// emittedReadable should be falseassert.strictEqual(readable._readableState.emittedReadable, false);
// These trigger a single 'readable', as things are batched upprocess.nextTick(common.mustCall(() => { readable.push('foo');}));process.nextTick(common.mustCall(() => { readable.push('bar');}));
// These triggers two readable eventssetImmediate(common.mustCall(() => { readable.push('quo'); process.nextTick(common.mustCall(() => { readable.push(null); }));}));
const noRead = new Readable({ read: () => {}});
noRead.on('readable', common.mustCall(() => { // emittedReadable should be true when the readable event is emitted assert.strictEqual(noRead._readableState.emittedReadable, true); noRead.read(0); // emittedReadable is not reset during read(0) assert.strictEqual(noRead._readableState.emittedReadable, true);}));
noRead.push('foo');noRead.push(null);
const flowing = new Readable({ read: () => {}});
flowing.on('data', common.mustCall(() => { // When in flowing mode, emittedReadable is always false. assert.strictEqual(flowing._readableState.emittedReadable, false); flowing.read(); assert.strictEqual(flowing._readableState.emittedReadable, false);}, 3));
flowing.push('foooo');flowing.push('bar');flowing.push('quo');process.nextTick(common.mustCall(() => { flowing.push(null);}));
std

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Tagged at
a year ago