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

	describe("MonoSynth", function(){

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

		if (Supports.CHROME_AUDIO_RENDERING){
			it("matches a file", function(){
				return CompareToFile(function(){
					const synth = new MonoSynth().toMaster();
					synth.triggerAttackRelease("C4", 0.1, 0.05);
				}, "monoSynth.wav", 1.75);
			});
		}

		context("API", function(){

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

			it("can get and set envelope attributes", function(){
				var monoSynth = new MonoSynth();
				monoSynth.envelope.attack = 0.24;
				expect(monoSynth.envelope.attack).to.equal(0.24);
				monoSynth.dispose();
			});

			it("can get and set filter attributes", function(){
				var monoSynth = new MonoSynth();
				monoSynth.filter.Q.value = 0.4;
				expect(monoSynth.filter.Q.value).to.be.closeTo(0.4, 0.001);
				monoSynth.dispose();
			});

			it("can get and set filterEnvelope attributes", function(){
				var monoSynth = new MonoSynth();
				monoSynth.filterEnvelope.baseFrequency = 400;
				expect(monoSynth.filterEnvelope.baseFrequency).to.equal(400);
				monoSynth.dispose();
			});

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

			it("can get/set attributes", function(){
				var monoSynth = new MonoSynth();
				monoSynth.set({
					"envelope.decay" : 0.24
				});
				expect(monoSynth.get().envelope.decay).to.equal(0.24);
				monoSynth.dispose();
			});

			it("is silent after triggerAttack if sustain is 0", function(){
				return Offline(function(){
					var synth = new MonoSynth({
						envelope : {
							attack : 0.1,
							decay : 0.1,
							sustain : 0,
						}
					}).toMaster();
					synth.triggerAttack("C4", 0);
				}, 0.5).then(function(buffer){
					expect(buffer.getLastSoundTime()).to.be.closeTo(0.2, 0.01);
				});
			});

		});
	});
});