Adding Angular and dependent packages for testing

third_party/pkg/angular/playback_middleware/spec/middleware_spec.js

Index: third_party/pkg/angular/playback_middleware/spec/middleware_spec.js
diff --git a/third_party/pkg/angular/playback_middleware/spec/middleware_spec.js b/third_party/pkg/angular/playback_middleware/spec/middleware_spec.js
new file mode 100644
index 0000000000000000000000000000000000000000..bc426e20161a1b944322143c1e7406c189503f03
--- /dev/null
+++ b/third_party/pkg/angular/playback_middleware/spec/middleware_spec.js
@@ -0,0 +1,73 @@
+var middleware = require('../lib/middleware.js');
+
+describe('middleware', function() {
+  var m, next, playImpl;
+  beforeEach(function() {
+    playImpl = { burn: false,
+        record: jasmine.createSpy('record'),
+        playback: jasmine.createSpy('playback')
+    };
+    m = middleware.endpoint({
+      playbackImpl: playImpl
+    });
+    next = jasmine.createSpy('next');
+  });
+
+
+  it('should call next() for requests it does not handle', function() {
+    m({url: '/notrecord'}, undefined, next);
+    expect(next).toHaveBeenCalled();
+  });
+
+  it('should call playback.record for POST requests', function() {
+    var req = jasmine.createSpy('req');
+    var res = {
+        writeHead: jasmine.createSpy('writeHead'),
+        end: jasmine.createSpy('end')
+    };
+
+    req.url = '/record';
+    req.method = 'POST';
+    var dataCb, endCb;
+    req.on = function(type, cb) {
+      if (type == 'data') dataCb = cb;
+      else if (type == 'end') endCb = cb;
+      else throw "Unknown type " + type;
+    };
+
+    m(req, res, next);
+
+    dataCb('{"key": "K",');
+    dataCb('"data": "V"}');
+    endCb();
+
+    expect(next).not.toHaveBeenCalled();
+    expect(playImpl.record).toHaveBeenCalledWith('K', 'V');
+    expect(res.writeHead).toHaveBeenCalledWith(200);
+    expect(res.end).toHaveBeenCalled();
+  });
+
+
+  it('should call playback.playback for GET requests', function() {
+    var req = {
+      url: '/record',
+      method: 'GET'
+    };
+
+    var res = {
+      writeHead: jasmine.createSpy('writeHead'),
+      end: jasmine.createSpy('end')
+    };
+
+    playImpl.playback.andReturn('data from a dart file');
+
+    m(req, res, next);
+
+    expect(next).not.toHaveBeenCalled();
+    expect(playImpl.playback).toHaveBeenCalled();
+    expect(res.writeHead).toHaveBeenCalledWith(200, {
+      'Content-Type' : 'application/dart',
+      'Content-Length' : 21 });
+    expect(res.end).toHaveBeenCalledWith('data from a dart file');
+  });
+});