Tone.js/Tone/index.test.ts

import * as Tone from "./index";
import { expect } from "chai";
import { Destination } from "./core/context/Destination";
import { Context } from "./core/context/Context";
import { Transport } from "./core/clock/Transport";
import { Draw } from "./core/util/Draw";

describe("Tone", () => {
	
	it("has 'now' and 'immediate' methods", () => {
		expect(Tone.now).to.be.a("function");
		expect(Tone.now()).to.be.a("number");
		expect(Tone.immediate).to.be.a("function");
		expect(Tone.immediate()).to.be.a("number");
	});

	it("exports the global singletons", () => {
		expect(Tone.Destination).to.be.an.instanceOf(Destination);
		expect(Tone.Draw).to.be.an.instanceOf(Draw);
		expect(Tone.Transport).to.be.an.instanceOf(Transport);
		expect(Tone.context).to.be.an.instanceOf(Context);
	});

	it("can start the global context", () => {
		return Tone.start();
	});

	it("resolves the promise when everything is loaded", () => {
		return Tone.loaded();
	});

	it("can set the global context from a raw online context", async () => {
		const ctx = new AudioContext();
		const origContext = Tone.getContext();
		Tone.setContext(ctx);
		expect(Tone.getContext().rawContext).to.equal(ctx);
		await ctx.close();
		Tone.setContext(origContext);
	});
	
	it("can set the global context from a raw offline context", async () => {
		const ctx = new OfflineAudioContext(2, 44100, 44100);
		const origContext = Tone.getContext();
		Tone.setContext(ctx);
		expect(Tone.getContext().rawContext).to.equal(ctx);
		Tone.setContext(origContext);
	});
});