PlayerSpec

playerSpec.js

describe( "Player library", function () {
	describe("Player", function() {
		it("exists in a library namespace", function() {
			expect(mediaITPro.Player).toBeDefined();
		});
		it("has an attachPlayer method", function() {
			expect(mediaITPro.Player.attachPlayer).toBeDefined();
		});
	});
	
	describe("Mixer", function() {
		it("exists in a library namespace", function() {
			expect(mediaITPro.Mixer).toBeDefined();
		});	
		it("can be instantiated", function() {
			var mixer = new mediaITPro.Mixer();
			expect(mixer).not.toBeNull();
		});
		describe("add sound to mixer", function() {
			var mixer;
			beforeEach(function () {
    			mixer = new mediaITPro.Mixer();
  			});

			it("throws errors for wrong url", function() {
				var testNoPath = function () {
        			mixer.addSound();
    			}
		    	expect(testNoPath).toThrow(new Error("You shall provide a URL to audio file."));
			});
			it("returns accending integer sound id", function() {
				var id = mixer.addSound("audio1.ogg");
				expect(id).toEqual(0);
				var id = mixer.addSound("audio2.ogg");
				expect(id).toEqual(1);
			});
			it("creates sound model and stores it in sounds array", function() {
			    mixer.addSound("audio1.ogg");
			    expect(mixer.sounds.length).toEqual(1);
				expect(mixer.sounds[0].url).toEqual("audio1.ogg");
				expect(mixer.sounds[0].id).toEqual(0);				
			});
			it("sets default sound gain to 1", function() {
				mixer.addSound("audio1.ogg");
				expect(mixer.sounds[0].gain).toEqual(1);
			});
			it("creates audio context", function() {
			    mixer.addSound("audio1.ogg");
			    expect(mixer.context.constructor).toEqual(webkitAudioContext);

			});
			it("fires added callback", function() {
				sinon.spy(mixer, "added");
			    mixer.addSound("audio1.ogg");
			    expect(mixer.added).toHaveBeenCalledWith(0, "audio1.ogg");
			});
			it("fires progress callback", function() {
				sinon.spy(mixer, "progress");
			    runs(function() {
			    	mixer.addSound("audio1.ogg");
				});
				waits(500);
				runs(function() {
					expect(mixer.progress).toHaveBeenCalledWith(0);
				});
			});
			it("fires loaded callback", function() {
				var isLoaded = false;
				
			    runs(function() {
			    	mixer.loaded = function() {
						isLoaded = true;
					}
					sinon.spy(mixer, "loaded");
			    	mixer.addSound("audio1.ogg");
				});
				waitsFor(function() {
					return isLoaded;
				}, "Audio file load never completed.", 10000);
				runs(function() {
					expect(mixer.loaded).toHaveBeenCalledWith(0);
					expect(mixer.loaded).toHaveBeenCalledOnce();
				});
			});
			it("decodes loaded audio into sound model buffer property of AudioBuffer type", function() {
			    var isLoaded = false;
			    runs(function() {
					mixer.loaded = function() {
						isLoaded = true;
					}
			    	mixer.addSound("audio1.ogg");
				});
				waitsFor(function() {
					return isLoaded;
				}, "Audio file load never completed.", 10000);
				runs(function() {
					expect(mixer.sounds[0].buffer).toBeDefined();
					expect(mixer.sounds[0].buffer.constructor).toEqual(new webkitAudioContext().createBuffer(2, 512, 44100).constructor);
				});
			});
		});

		describe("set sound gain", function() {
			var mixer;
			beforeEach(function () {
    			mixer = new mediaITPro.Mixer();
  			});
  			it("throws error for undefined id", function() {
  				var testNoId = function () {
        			mixer.setSoundGain();
    			}
		    	expect(testNoId).toThrow(new Error("You shall provide a sound id."));
  			})
  			it("throws error for id less than 0", function() {
				var testWrongId = function () {
        			mixer.setSoundGain(-1);
    			}
		    	expect(testWrongId).toThrow(new Error("You shall provide a correct sound id."));
			});
  			it("throws error for not existing id", function() {
				var testWrongId = function () {
        			mixer.setSoundGain(0);
    			}
		    	expect(testWrongId).toThrow(new Error("You shall provide an existing sound id."));
			});
			it("throws error for undefined gain", function(){

				var testNoGain = function () {
					var id = mixer.addSound("audio1.ogg");
        			mixer.setSoundGain(id);
    			}
		    	expect(testNoGain).toThrow(new Error("You shall provide a sound gain value."));
			});
		});
		
	});
});

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