mirror of https://gitee.com/openkylin/nodejs.git
92 lines
2.7 KiB
JavaScript
92 lines
2.7 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'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 Writable = require('_stream_writable');
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const EE = require('events').EventEmitter;
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function runTest(highWaterMark, objectMode, produce) {
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const old = new EE();
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const r = new Readable({ highWaterMark, objectMode });
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assert.strictEqual(r, r.wrap(old));
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r.on('end', common.mustCall());
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old.pause = function() {
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old.emit('pause');
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flowing = false;
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};
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old.resume = function() {
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old.emit('resume');
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flow();
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};
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let flowing;
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let chunks = 10;
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let oldEnded = false;
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const expected = [];
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function flow() {
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flowing = true;
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while (flowing && chunks-- > 0) {
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const item = produce();
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expected.push(item);
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old.emit('data', item);
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}
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if (chunks <= 0) {
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oldEnded = true;
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old.emit('end');
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}
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}
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const w = new Writable({ highWaterMark: highWaterMark * 2,
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objectMode });
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const written = [];
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w._write = function(chunk, encoding, cb) {
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written.push(chunk);
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setTimeout(cb, 1);
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};
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w.on('finish', common.mustCall(function() {
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performAsserts();
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}));
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r.pipe(w);
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flow();
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function performAsserts() {
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assert(oldEnded);
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assert.deepStrictEqual(written, expected);
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}
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}
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runTest(100, false, function() { return Buffer.allocUnsafe(100); });
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runTest(10, false, function() { return Buffer.from('xxxxxxxxxx'); });
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runTest(1, true, function() { return { foo: 'bar' }; });
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const objectChunks = [ 5, 'a', false, 0, '', 'xyz', { x: 4 }, 7, [], 555 ];
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runTest(1, true, function() { return objectChunks.shift(); });
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