import { expect } from "chai";
import { FeedbackCombFilter } from "./FeedbackCombFilter";
import { BasicTests } from "test/helper/Basic";
import { PassAudio } from "test/helper/PassAudio";

describe("FeedbackCombFilter", () => {

	BasicTests(FeedbackCombFilter);

	context("Comb Filtering", () => {

		it("can be constructed with an object", () => {
			const fbcf = new FeedbackCombFilter({
				delayTime: 0.2,
				resonance: 0.3,
			});
			expect(fbcf.delayTime.value).to.be.closeTo(0.2, 0.001);
			expect(fbcf.resonance.value).to.be.closeTo(0.3, 0.001);
			fbcf.dispose();
		});

		it("can be get and set through object", () => {
			const fbcf = new FeedbackCombFilter();
			fbcf.set({
				delayTime: 0.2,
				resonance: 0.3,
			});
			const values = fbcf.get();
			expect(values.delayTime).to.be.closeTo(0.2, 0.001);
			expect(values.resonance).to.be.closeTo(0.3, 0.001);
			fbcf.dispose();
		});

		it("passes the incoming signal through", () => {
			return PassAudio(input => {
				const fbcf = new FeedbackCombFilter({
					delayTime: 0,
				}).toDestination();
				input.connect(fbcf);
			});
		});
	});
});