| // Copyright Joyent, Inc. and other Node contributors. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a |
| // copy of this software and associated documentation files (the |
| // "Software"), to deal in the Software without restriction, including |
| // without limitation the rights to use, copy, modify, merge, publish, |
| // distribute, sublicense, and/or sell copies of the Software, and to permit |
| // persons to whom the Software is furnished to do so, subject to the |
| // following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included |
| // in all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN |
| // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
| // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| // USE OR OTHER DEALINGS IN THE SOFTWARE. |
| |
| 'use strict'; |
| const common = require('../common'); |
| const assert = require('assert'); |
| |
| const Readable = require('stream').Readable; |
| |
| { |
| // First test, not reading when the readable is added. |
| // make sure that on('readable', ...) triggers a readable event. |
| const r = new Readable({ |
| highWaterMark: 3 |
| }); |
| |
| r._read = common.mustNotCall(); |
| |
| // This triggers a 'readable' event, which is lost. |
| r.push(Buffer.from('blerg')); |
| |
| setTimeout(function() { |
| // We're testing what we think we are |
| assert(!r._readableState.reading); |
| r.on('readable', common.mustCall()); |
| }, 1); |
| } |
| |
| { |
| // Second test, make sure that readable is re-emitted if there's |
| // already a length, while it IS reading. |
| |
| const r = new Readable({ |
| highWaterMark: 3 |
| }); |
| |
| r._read = common.mustCall(); |
| |
| // This triggers a 'readable' event, which is lost. |
| r.push(Buffer.from('bl')); |
| |
| setTimeout(function() { |
| // Assert we're testing what we think we are |
| assert(r._readableState.reading); |
| r.on('readable', common.mustCall()); |
| }, 1); |
| } |
| |
| { |
| // Third test, not reading when the stream has not passed |
| // the highWaterMark but *has* reached EOF. |
| const r = new Readable({ |
| highWaterMark: 30 |
| }); |
| |
| r._read = common.mustNotCall(); |
| |
| // This triggers a 'readable' event, which is lost. |
| r.push(Buffer.from('blerg')); |
| r.push(null); |
| |
| setTimeout(function() { |
| // Assert we're testing what we think we are |
| assert(!r._readableState.reading); |
| r.on('readable', common.mustCall()); |
| }, 1); |
| } |
| |
| { |
| // Pushing an empty string in non-objectMode should |
| // trigger next `read()`. |
| const underlyingData = ['', 'x', 'y', '', 'z']; |
| const expected = underlyingData.filter((data) => data); |
| const result = []; |
| |
| const r = new Readable({ |
| encoding: 'utf8', |
| }); |
| r._read = function() { |
| process.nextTick(() => { |
| if (!underlyingData.length) { |
| this.push(null); |
| } else { |
| this.push(underlyingData.shift()); |
| } |
| }); |
| }; |
| |
| r.on('readable', () => { |
| const data = r.read(); |
| if (data !== null) result.push(data); |
| }); |
| |
| r.on('end', common.mustCall(() => { |
| assert.deepStrictEqual(result, expected); |
| })); |
| } |
| |
| { |
| // #20923 |
| const r = new Readable(); |
| r._read = function() { |
| // Actually doing thing here |
| }; |
| r.on('data', function() {}); |
| |
| r.removeAllListeners(); |
| |
| assert.strictEqual(r.eventNames().length, 0); |
| } |