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node_modules/needle/test/response_stream_spec.js

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+var should = require('should'),
+    needle = require('./../'),
+    http   = require('http'),
+    stream = require('stream'),
+    fs     = require('fs'),
+    port   = 11111,
+    server;
+
+describe('response streams', function() {
+
+  describe('when the server sends back json', function(){
+
+    before(function(done) {
+      server = http.createServer(function(req, res) {
+        res.setHeader('Content-Type', 'application/json')
+        res.end('{"foo":"bar"}')
+      }).listen(port, done);
+    });
+
+    after(function(done) {
+      server.close(done);
+    })
+
+    describe('and the client uses streams', function(){
+
+      it('creates a proper streams2 stream', function(done) {
+        var stream = needle.get('localhost:' + port)
+
+        // newer node versions set this to null instead of false
+        var bool = !!stream._readableState.flowing;
+        should.equal(false, bool);
+
+        var readableCalled = false;
+        stream.on('readable', function() {
+          readableCalled = true;
+        })
+
+        stream.on('finish', function() {
+          readableCalled.should.be.true;
+          done();
+        });
+
+        stream.resume();
+      })
+
+      it('emits a single data item which is our JSON object', function(done) {
+        var stream = needle.get('localhost:' + port)
+
+        var chunks = [];
+        stream.on('readable', function () {
+          while (chunk = this.read()) {
+            chunk.should.be.an.Object;
+            chunks.push(chunk);
+          }
+        })
+
+        stream.on('done', function () {
+          chunks.should.have.length(1)
+          chunks[0].should.have.property('foo', 'bar');
+          done();
+        });
+      })
+
+      it('emits a raw buffer if we do not want to parse JSON', function(done) {
+        var stream  = needle.get('localhost:' + port, { parse: false })
+
+        var chunks = [];
+        stream.on('readable', function () {
+          while (chunk = this.read()) {
+            Buffer.isBuffer(chunk).should.be.true;
+            chunks.push(chunk);
+          }
+        })
+
+        stream.on('done', function() {
+          var body = Buffer.concat(chunks).toString();
+          body.should.equal('{"foo":"bar"}')
+          done();
+        });
+      })
+
+    })
+  })
+
+  describe('when the server sends back what was posted to it', function () {
+    var file = 'asdf.txt';
+
+    before(function(done){
+      server = http.createServer(function(req, res) {
+        res.setHeader('Content-Type', 'application/octet')
+        req.pipe(res);
+      }).listen(port);
+
+      fs.writeFile(file, 'contents of stream', done);
+    });
+
+    after(function(done){
+      server.close();
+      fs.unlink(file, done);
+    })
+
+    it('can PUT a stream', function (done) {
+      var stream = needle.put('localhost:' + port, fs.createReadStream(file), { stream: true });
+
+      var chunks = [];
+      stream.on('readable', function () {
+        while (chunk = this.read()) {
+          Buffer.isBuffer(chunk).should.be.true;
+          chunks.push(chunk);
+        }
+      })
+
+      stream.on('end', function () {
+        var body = Buffer.concat(chunks).toString();
+          body.should.equal('contents of stream')
+          done();
+      });
+    });
+
+    it('can PATCH a stream', function (done) {
+      var stream = needle.patch('localhost:' + port, fs.createReadStream(file), { stream: true });
+
+      var chunks = [];
+      stream.on('readable', function () {
+        while (chunk = this.read()) {
+          Buffer.isBuffer(chunk).should.be.true;
+          chunks.push(chunk);
+        }
+      })
+
+      stream.on('end', function () {
+        var body = Buffer.concat(chunks).toString();
+          body.should.equal('contents of stream')
+          done();
+      });
+    });
+  })
+})