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'use strict'; const common = require('../common'); const assert = require('assert'); const { Writable, Readable } = require('stream'); class NullWriteable extends Writable { _write(chunk, encoding, callback) { return callback(); } } class QuickEndReadable extends Readable { _read() { this.push(null); } } class NeverEndReadable extends Readable { _read() {} } { const dest = new NullWriteable(); const src = new QuickEndReadable(); dest.on('pipe', common.mustCall()); dest.on('unpipe', common.mustCall()); src.pipe(dest); setImmediate(() => { assert.strictEqual(src._readableState.pipes.length, 0); }); } { const dest = new NullWriteable(); const src = new NeverEndReadable(); dest.on('pipe', common.mustCall()); dest.on('unpipe', common.mustNotCall('unpipe should not have been emitted')); src.pipe(dest); setImmediate(() => { assert.strictEqual(src._readableState.pipes.length, 1); }); } { const dest = new NullWriteable(); const src = new NeverEndReadable(); dest.on('pipe', common.mustCall()); dest.on('unpipe', common.mustCall()); src.pipe(dest); src.unpipe(dest); setImmediate(() => { assert.strictEqual(src._readableState.pipes.length, 0); }); } { const dest = new NullWriteable(); const src = new QuickEndReadable(); dest.on('pipe', common.mustCall()); dest.on('unpipe', common.mustCall()); src.pipe(dest, { end: false }); setImmediate(() => { assert.strictEqual(src._readableState.pipes.length, 0); }); } { const dest = new NullWriteable(); const src = new NeverEndReadable(); dest.on('pipe', common.mustCall()); dest.on('unpipe', common.mustNotCall('unpipe should not have been emitted')); src.pipe(dest, { end: false }); setImmediate(() => { assert.strictEqual(src._readableState.pipes.length, 1); }); } { const dest = new NullWriteable(); const src = new NeverEndReadable(); dest.on('pipe', common.mustCall()); dest.on('unpipe', common.mustCall()); src.pipe(dest, { end: false }); src.unpipe(dest); setImmediate(() => { assert.strictEqual(src._readableState.pipes.length, 0); }); }