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common.js needs to be loaded in all tests so that there is checking for variable leaks and possibly other things. However, it does not need to be assigned to a variable if nothing in common.js is referred to elsewhere in the test. PR-URL: https://github.com/nodejs/node/pull/4408 Reviewed-By: James M Snell <jasnell@gmail.com>
103 lines
2.5 KiB
JavaScript
103 lines
2.5 KiB
JavaScript
'use strict';
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// This test asserts that Stream.prototype.pipe does not leave listeners
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// hanging on the source or dest.
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require('../common');
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var stream = require('stream');
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var assert = require('assert');
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var util = require('util');
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function Writable() {
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this.writable = true;
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this.endCalls = 0;
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stream.Stream.call(this);
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}
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util.inherits(Writable, stream.Stream);
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Writable.prototype.end = function() {
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this.endCalls++;
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};
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Writable.prototype.destroy = function() {
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this.endCalls++;
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};
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function Readable() {
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this.readable = true;
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stream.Stream.call(this);
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}
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util.inherits(Readable, stream.Stream);
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function Duplex() {
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this.readable = true;
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Writable.call(this);
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}
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util.inherits(Duplex, Writable);
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var i = 0;
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var limit = 100;
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var w = new Writable();
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var r;
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for (i = 0; i < limit; i++) {
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r = new Readable();
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r.pipe(w);
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r.emit('end');
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}
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assert.equal(0, r.listeners('end').length);
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assert.equal(limit, w.endCalls);
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w.endCalls = 0;
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for (i = 0; i < limit; i++) {
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r = new Readable();
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r.pipe(w);
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r.emit('close');
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}
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assert.equal(0, r.listeners('close').length);
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assert.equal(limit, w.endCalls);
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w.endCalls = 0;
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r = new Readable();
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for (i = 0; i < limit; i++) {
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w = new Writable();
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r.pipe(w);
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w.emit('close');
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}
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assert.equal(0, w.listeners('close').length);
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r = new Readable();
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w = new Writable();
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var d = new Duplex();
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r.pipe(d); // pipeline A
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d.pipe(w); // pipeline B
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assert.equal(r.listeners('end').length, 2); // A.onend, A.cleanup
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assert.equal(r.listeners('close').length, 2); // A.onclose, A.cleanup
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assert.equal(d.listeners('end').length, 2); // B.onend, B.cleanup
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assert.equal(d.listeners('close').length, 3); // A.cleanup, B.onclose, B.cleanup
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assert.equal(w.listeners('end').length, 0);
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assert.equal(w.listeners('close').length, 1); // B.cleanup
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r.emit('end');
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assert.equal(d.endCalls, 1);
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assert.equal(w.endCalls, 0);
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assert.equal(r.listeners('end').length, 0);
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assert.equal(r.listeners('close').length, 0);
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assert.equal(d.listeners('end').length, 2); // B.onend, B.cleanup
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assert.equal(d.listeners('close').length, 2); // B.onclose, B.cleanup
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assert.equal(w.listeners('end').length, 0);
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assert.equal(w.listeners('close').length, 1); // B.cleanup
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d.emit('end');
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assert.equal(d.endCalls, 1);
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assert.equal(w.endCalls, 1);
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assert.equal(r.listeners('end').length, 0);
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assert.equal(r.listeners('close').length, 0);
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assert.equal(d.listeners('end').length, 0);
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assert.equal(d.listeners('close').length, 0);
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assert.equal(w.listeners('end').length, 0);
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assert.equal(w.listeners('close').length, 0);
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