some sanity checks on the final interface

Tone/index.test.ts

@@ -0,0 +1,23 @@
+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);
+	});
+});