Tone.js/test/signal/GainToAudio.js

import ConstantOutput from "helper/ConstantOutput";
import GainToAudio from "Tone/signal/GainToAudio";
import Basic from "helper/Basic";
import Test from "helper/Test";
import Signal from "Tone/signal/Signal";
import Zero from "Tone/signal/Zero";

describe("GainToAudio", function(){

	Basic(GainToAudio);

	context("Gain To Audio", function(){

		it("handles input and output connections", function(){
			var g2a = new GainToAudio();
			Test.connect(g2a);
			g2a.connect(Test);
			g2a.dispose();
		});

		it("outputs 0 for an input value of 0.5", function(){
			return ConstantOutput(function(){
				var sig = new Signal(0.5);
				var g2a = new GainToAudio();
				sig.connect(g2a);
				g2a.toMaster();
			}, 0); 
		});

		it("outputs 1 for an input value of 1", function(){
			return ConstantOutput(function(){
				var sig = new Signal(1);
				var g2a = new GainToAudio();
				sig.connect(g2a);
				g2a.toMaster();
			}, 1); 
		});

		it("outputs -1 for an input value of 0", function(){
			return ConstantOutput(function(){
				var sig = new Zero();
				var g2a = new GainToAudio();
				sig.connect(g2a);
				g2a.toMaster();
			}, -1); 
		});
	});
});