Tone.js/Tone/source/Noise.test.ts

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2019-06-19 14:15:15 +00:00
import { BasicTests } from "test/helper/Basic";
import { Noise } from "./Noise";
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import { expect } from "chai";
import { SourceTests } from "test/helper/SourceTests";
import { OutputAudio } from "test/helper/OutputAudio";
import { CompareToFile } from "test/helper/CompareToFile";
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describe("Noise", () => {
// run the common tests
BasicTests(Noise);
SourceTests(Noise);
it("matches a file", () => {
return CompareToFile(() => {
const noise = new Noise().toMaster();
noise.start(0.1).stop(0.2);
}, "noise.wav", 9);
});
context("Get/Set", () => {
it("can be constructed with an options object", () => {
const noise = new Noise({
type: "brown",
});
expect(noise.type).to.equal("brown");
noise.dispose();
});
it("can set the playbackRate in the constructor", () => {
const noise = new Noise({
playbackRate: 2,
});
expect(noise.playbackRate).to.equal(2);
noise.dispose();
});
it("can set the playbackRate after the noise is started", () => {
return OutputAudio(() => {
const noise = new Noise().toMaster();
noise.start();
noise.playbackRate = 3;
expect(noise.playbackRate).to.equal(3);
});
});
});
context("Type", () => {
it("can be set to 3 noise types", () => {
const noise = new Noise();
const types = ["white", "brown", "pink"];
types.forEach(type => {
// @ts-ignore
noise.type = type;
expect(noise.type).to.equal(type);
});
noise.dispose();
});
it("cant set invalid type", () => {
const noise = new Noise();
expect(() => {
// @ts-ignore
noise.type = "else";
}).to.throw(Error);
noise.dispose();
});
it("outputs white noise", () => {
return OutputAudio(() => {
const noise = new Noise("white");
noise.toMaster();
noise.start();
});
});
it("outputs pink noise", () => {
return OutputAudio(() => {
const noise = new Noise("pink");
noise.toMaster();
noise.start();
});
});
it("outputs brown noise", () => {
return OutputAudio(() => {
const noise = new Noise("brown");
noise.toMaster();
noise.start();
});
});
it("can set the type after the noise is started", () => {
return OutputAudio(() => {
const noise = new Noise();
noise.toMaster();
noise.start();
noise.type = "brown";
});
});
});
});