Tone.js/test/instrument/FMSynth.js

define(["Tone/instrument/FMSynth", "helper/Basic",
	"helper/InstrumentTests", "helper/CompareToFile", "helper/Supports"],
function(FMSynth, Basic, InstrumentTest, CompareToFile, Supports){

	describe("FMSynth", function(){

		Basic(FMSynth);
		InstrumentTest(FMSynth, "C4");

		if (Supports.CHROME_AUDIO_RENDERING){
			it("matches a file", function(){
				return CompareToFile(function(){
					var synth = new FMSynth().toMaster();
					synth.triggerAttackRelease("G4", 0.1, 0.05);
				}, "fmSynth.wav", 0.1);
			});
		}

		context("API", function(){

			it("can get and set carrier attributes", function(){
				var fmSynth = new FMSynth();
				fmSynth.oscillator.type = "triangle";
				expect(fmSynth.oscillator.type).to.equal("triangle");
				fmSynth.dispose();
			});

			it("can get and set modulator attributes", function(){
				var fmSynth = new FMSynth();
				fmSynth.modulationEnvelope.attack = 0.24;
				expect(fmSynth.modulationEnvelope.attack).to.equal(0.24);
				fmSynth.dispose();
			});

			it("can get and set harmonicity", function(){
				var fmSynth = new FMSynth();
				fmSynth.harmonicity.value = 2;
				expect(fmSynth.harmonicity.value).to.equal(2);
				fmSynth.dispose();
			});

			it("can be constructed with an options object", function(){
				var fmSynth = new FMSynth({
					"envelope" : {
						"release" : 0.3
					}
				});
				expect(fmSynth.envelope.release).to.equal(0.3);
				fmSynth.dispose();
			});

			it("can get/set attributes", function(){
				var fmSynth = new FMSynth();
				fmSynth.set({
					"harmonicity" : 1.5,
					"detune" : 1200,
				});
				expect(fmSynth.get().harmonicity).to.equal(1.5);
				expect(fmSynth.get().detune).to.be.closeTo(1200, 1);
				fmSynth.dispose();
			});

		});
	});
});