Tone.js/Tone/component/analysis/Waveform.test.ts

import { expect } from "chai";
import { BasicTests } from "test/helper/Basic";
import { ONLINE_TESTING } from "test/helper/Supports";
import { Noise } from "Tone/source/Noise";
import { Waveform } from "./Waveform";

describe("Waveform", () => {

	BasicTests(Waveform);

	it("can get and set properties", () => {
		const anl = new Waveform();
		anl.set({
			size: 128,
		});
		const values = anl.get();
		expect(values.size).to.equal(128);
		anl.dispose();
	});

	it("can correctly set the size", () => {
		const anl = new Waveform(512);
		expect(anl.size).to.equal(512);
		anl.size = 1024;
		expect(anl.size).to.equal(1024);
		anl.dispose();
	});

	if (ONLINE_TESTING) {

		it("can run waveform analysis", (done) => {
			const noise = new Noise();
			const anl = new Waveform(256);
			noise.connect(anl);
			noise.start();

			setTimeout(() => {
				const analysis = anl.getValue();
				expect(analysis.length).to.equal(256);
				analysis.forEach(value => {
					expect(value).is.within(-1, 1);
				});
				anl.dispose();
				noise.dispose();
				done();
			}, 300);
		});
	}
});