mirror of https://gitee.com/openkylin/nodejs.git
79 lines
2.3 KiB
JavaScript
79 lines
2.3 KiB
JavaScript
'use strict';
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const common = require('../common');
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// Regression test for https://github.com/nodejs/node/issues/12718.
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// Tests that piping a source stream twice to the same destination stream
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// works, and that a subsequent unpipe() call only removes the pipe *once*.
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const assert = require('assert');
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const { PassThrough, Writable } = require('stream');
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{
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const passThrough = new PassThrough();
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const dest = new Writable({
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write: common.mustCall((chunk, encoding, cb) => {
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assert.strictEqual(`${chunk}`, 'foobar');
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cb();
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})
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});
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passThrough.pipe(dest);
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passThrough.pipe(dest);
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assert.strictEqual(passThrough._events.data.length, 2);
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assert.strictEqual(passThrough._readableState.pipesCount, 2);
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assert.strictEqual(passThrough._readableState.pipes[0], dest);
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assert.strictEqual(passThrough._readableState.pipes[1], dest);
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passThrough.unpipe(dest);
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assert.strictEqual(passThrough._events.data.length, 1);
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assert.strictEqual(passThrough._readableState.pipesCount, 1);
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assert.strictEqual(passThrough._readableState.pipes, dest);
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passThrough.write('foobar');
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passThrough.pipe(dest);
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}
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{
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const passThrough = new PassThrough();
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const dest = new Writable({
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write: common.mustCall((chunk, encoding, cb) => {
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assert.strictEqual(`${chunk}`, 'foobar');
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cb();
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}, 2)
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});
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passThrough.pipe(dest);
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passThrough.pipe(dest);
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assert.strictEqual(passThrough._events.data.length, 2);
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assert.strictEqual(passThrough._readableState.pipesCount, 2);
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assert.strictEqual(passThrough._readableState.pipes[0], dest);
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assert.strictEqual(passThrough._readableState.pipes[1], dest);
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passThrough.write('foobar');
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}
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{
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const passThrough = new PassThrough();
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const dest = new Writable({
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write: common.mustNotCall()
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});
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passThrough.pipe(dest);
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passThrough.pipe(dest);
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assert.strictEqual(passThrough._events.data.length, 2);
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assert.strictEqual(passThrough._readableState.pipesCount, 2);
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assert.strictEqual(passThrough._readableState.pipes[0], dest);
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assert.strictEqual(passThrough._readableState.pipes[1], dest);
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passThrough.unpipe(dest);
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passThrough.unpipe(dest);
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assert.strictEqual(passThrough._events.data, undefined);
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assert.strictEqual(passThrough._readableState.pipesCount, 0);
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passThrough.write('foobar');
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}
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