import { BasicTests } from "test/helper/Basic";
import { connectFrom, connectTo } from "test/helper/Connect";
import { ConstantOutput } from "test/helper/ConstantOutput";
import { Signal } from "Tone/signal/Signal";
import { CrossFade } from "./CrossFade";

describe("CrossFade", () => {

	BasicTests(CrossFade);

	context("Fading", () => {

		it("handles input and output connections", () => {
			const comp = new CrossFade();
			connectFrom().connect(comp.a);
			connectFrom().connect(comp.b);
			comp.connect(connectTo());
			comp.dispose();
		});

		it("pass 100% of input 0", () => {
			return ConstantOutput(() => {
				const crossFade = new CrossFade();
				const drySignal = new Signal(10);
				const wetSignal = new Signal(20);
				drySignal.connect(crossFade.a);
				wetSignal.connect(crossFade.b);
				crossFade.fade.value = 0;
				crossFade.toDestination();
			}, 10, 0.05);
		});

		it("pass 100% of input 1", () => {
			return ConstantOutput(() => {
				const crossFade = new CrossFade();
				const drySignal = new Signal(10);
				const wetSignal = new Signal(20);
				drySignal.connect(crossFade.a);
				wetSignal.connect(crossFade.b);
				crossFade.fade.value = 1;
				crossFade.toDestination();
			}, 20, 0.01);
		});

		it("can mix two signals", () => {
			return ConstantOutput(() => {
				const crossFade = new CrossFade();
				const drySignal = new Signal(2);
				const wetSignal = new Signal(1);
				drySignal.connect(crossFade.a);
				wetSignal.connect(crossFade.b);
				crossFade.fade.value = 0.5;
				crossFade.toDestination();
			}, 2.12, 0.01);
		});
	});
});