solved task 2

jasmine_demo/spec/helpers/jasmine_examples/SpecHelper.js

@@ -0,0 +1,15 @@
+beforeEach(function () {
+  jasmine.addMatchers({
+    toBePlaying: function () {
+      return {
+        compare: function (actual, expected) {
+          var player = actual;
+
+          return {
+            pass: player.currentlyPlayingSong === expected && player.isPlaying
+          }
+        }
+      };
+    }
+  });
+});

jasmine_demo/spec/jasmine_examples/PlayerSpec.js

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+describe("Player", function() {
+  var Player = require('../../lib/jasmine_examples/Player');
+  var Song = require('../../lib/jasmine_examples/Song');
+  var player;
+  var song;
+
+  beforeEach(function() {
+    player = new Player();
+    song = new Song();
+  });
+
+  it("should be able to play a Song", function() {
+    player.play(song);
+    expect(player.currentlyPlayingSong).toEqual(song);
+
+    //demonstrates use of custom matcher
+    expect(player).toBePlaying(song);
+  });
+
+  describe("when song has been paused", function() {
+    beforeEach(function() {
+      player.play(song);
+      player.pause();
+    });
+
+    it("should indicate that the song is currently paused", function() {
+      expect(player.isPlaying).toBeFalsy();
+
+      // demonstrates use of 'not' with a custom matcher
+      expect(player).not.toBePlaying(song);
+    });
+
+    it("should be possible to resume", function() {
+      player.resume();
+      expect(player.isPlaying).toBeTruthy();
+      expect(player.currentlyPlayingSong).toEqual(song);
+    });
+  });
+
+  // demonstrates use of spies to intercept and test method calls
+  it("tells the current song if the user has made it a favorite", function() {
+    spyOn(song, 'persistFavoriteStatus');
+
+    player.play(song);
+    player.makeFavorite();
+
+    expect(song.persistFavoriteStatus).toHaveBeenCalledWith(true);
+  });
+
+  //demonstrates use of expected exceptions
+  describe("#resume", function() {
+    it("should throw an exception if song is already playing", function() {
+      player.play(song);
+
+      expect(function() {
+        player.resume();
+      }).toThrowError("song is already playing");
+    });
+  });
+});

jasmine_demo/spec/support/jasmine.json

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+{
+  "spec_dir": "spec",
+  "spec_files": [
+    "**/*[sS]pec.?(m)js"
+  ],
+  "helpers": [
+    "helpers/**/*.?(m)js"
+  ],
+  "env": {
+    "stopSpecOnExpectationFailure": false,
+    "random": true
+  }
+}