181 lines
4.3 KiB
JavaScript
181 lines
4.3 KiB
JavaScript
/*jshint node:true */
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/*global describe:false, it:false */
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"use strict";
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var consume = require('../');
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var Stream = require('stream');
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var Readable = Stream.Readable;
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var Writable = Stream.Writable;
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var Duplex = Stream.Duplex;
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var should = require('should');
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var through = require('through2');
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require('mocha');
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describe('stream-consume', function() {
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it('should cause a Readable stream to complete if it\'s not piped anywhere', function(done) {
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var rs = new Readable({highWaterMark: 2});
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var a = 0;
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var ended = false;
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rs._read = function() {
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if (a++ < 100) {
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rs.push(a + "");
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} else {
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ended = true;
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rs.push(null);
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}
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};
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rs.on("end", function() {
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a.should.be.above(99);
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ended.should.be.true;
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done();
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});
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consume(rs);
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});
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it('should work with Readable streams in objectMode', function(done) {
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var rs = new Readable({highWaterMark: 2, objectMode: true});
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var a = 0;
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var ended = false;
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rs._read = function() {
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if (a++ < 100) {
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rs.push(a);
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} else {
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ended = true;
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rs.push(null);
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}
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};
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rs.on("end", function() {
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a.should.be.above(99);
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ended.should.be.true;
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done();
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});
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consume(rs);
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});
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it('should not interfere with a Readable stream that is piped somewhere', function(done) {
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var rs = new Readable({highWaterMark: 2});
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var a = 0;
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var ended = false;
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rs._read = function() {
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if (a++ < 100) {
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rs.push(".");
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} else {
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ended = true;
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rs.push(null);
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}
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};
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var sizeRead = 0;
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var ws = new Writable({highWaterMark: 2});
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ws._write = function(chunk, enc, next) {
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sizeRead += chunk.length;
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next();
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}
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ws.on("finish", function() {
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a.should.be.above(99);
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ended.should.be.true;
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sizeRead.should.equal(100);
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done();
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});
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rs.pipe(ws);
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consume(rs);
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});
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it('should not interfere with a Writable stream', function(done) {
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var rs = new Readable({highWaterMark: 2});
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var a = 0;
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var ended = false;
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rs._read = function() {
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if (a++ < 100) {
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rs.push(".");
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} else {
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ended = true;
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rs.push(null);
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}
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};
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var sizeRead = 0;
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var ws = new Writable({highWaterMark: 2});
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ws._write = function(chunk, enc, next) {
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sizeRead += chunk.length;
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next();
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}
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ws.on("finish", function() {
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a.should.be.above(99);
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ended.should.be.true;
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sizeRead.should.equal(100);
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done();
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});
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rs.pipe(ws);
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consume(ws);
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});
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it('should handle a Transform stream', function(done) {
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var rs = new Readable({highWaterMark: 2});
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var a = 0;
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var ended = false;
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rs._read = function() {
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if (a++ < 100) {
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rs.push(".");
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} else {
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ended = true;
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rs.push(null);
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}
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};
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var sizeRead = 0;
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var flushed = false;
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var ts = through({highWaterMark: 2}, function(chunk, enc, cb) {
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sizeRead += chunk.length;
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this.push(chunk);
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cb();
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}, function(cb) {
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flushed = true;
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cb();
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});
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ts.on("end", function() {
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a.should.be.above(99);
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ended.should.be.true;
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sizeRead.should.equal(100);
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flushed.should.be.true;
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done();
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});
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rs.pipe(ts);
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consume(ts);
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});
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it('should handle a classic stream', function(done) {
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var rs = new Stream();
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var ended = false;
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var i;
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rs.on("end", function() {
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ended.should.be.true;
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done();
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});
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consume(rs);
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for (i = 0; i < 100; i++) {
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rs.emit("data", i);
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}
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ended = true;
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rs.emit("end");
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});
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});
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