| 1 | import { Tremolo } from "./Tremolo.js";
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| 2 | import { BasicTests } from "../../test/helper/Basic.js";
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| 3 | import { EffectTests } from "../../test/helper/EffectTests.js";
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| 4 | import { Offline } from "../../test/helper/Offline.js";
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| 5 | import { expect } from "chai";
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| 6 | import { CompareToFile } from "../../test/helper/CompareToFile.js";
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| 7 | import { Oscillator } from "../source/index.js";
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| 8 |
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| 9 | describe("Tremolo", () => {
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| 10 | BasicTests(Tremolo);
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| 11 | EffectTests(Tremolo);
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| 12 |
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| 13 | it("matches a file", () => {
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| 14 | return CompareToFile(
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| 15 | () => {
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| 16 | const tremolo = new Tremolo().toDestination().start(0.2);
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| 17 | const osc = new Oscillator().connect(tremolo).start();
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| 18 | },
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| 19 | "tremolo.wav",
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| 20 | 0.05
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| 21 | );
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| 22 | });
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| 23 |
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| 24 | context("API", () => {
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| 25 | it("can pass in options in the constructor", () => {
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| 26 | const tremolo = new Tremolo({
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| 27 | depth: 0.2,
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| 28 | type: "sawtooth",
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| 29 | spread: 160,
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| 30 | });
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| 31 | expect(tremolo.depth.value).to.be.closeTo(0.2, 0.001);
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| 32 | expect(tremolo.type).to.equal("sawtooth");
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| 33 | expect(tremolo.spread).to.equal(160);
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| 34 | tremolo.dispose();
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| 35 | });
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| 36 |
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| 37 | it("can be started and stopped", () => {
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| 38 | const tremolo = new Tremolo();
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| 39 | tremolo.start().stop("+0.2");
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| 40 | tremolo.dispose();
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| 41 | });
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| 42 |
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| 43 | it("can get/set the options", () => {
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| 44 | const tremolo = new Tremolo();
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| 45 | tremolo.set({
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| 46 | frequency: 2.4,
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| 47 | type: "triangle",
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| 48 | });
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| 49 | expect(tremolo.get().frequency).to.be.closeTo(2.4, 0.01);
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| 50 | expect(tremolo.get().type).to.equal("triangle");
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| 51 | tremolo.dispose();
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| 52 | });
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| 53 |
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| 54 | it("can set the frequency and depth", () => {
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| 55 | const tremolo = new Tremolo();
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| 56 | tremolo.depth.value = 0.4;
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| 57 | tremolo.frequency.value = 0.4;
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| 58 | expect(tremolo.depth.value).to.be.closeTo(0.4, 0.01);
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| 59 | expect(tremolo.frequency.value).to.be.closeTo(0.4, 0.01);
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| 60 | tremolo.dispose();
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| 61 | });
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| 62 |
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| 63 | it("can sync the frequency to the transport", () => {
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| 64 | return Offline(({ transport }) => {
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| 65 | const tremolo = new Tremolo(2);
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| 66 | tremolo.sync();
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| 67 | tremolo.frequency.toDestination();
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| 68 | transport.bpm.setValueAtTime(transport.bpm.value * 2, 0.05);
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| 69 | }, 0.1).then((buffer) => {
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| 70 | expect(buffer.getValueAtTime(0)).to.be.closeTo(2, 0.1);
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| 71 | expect(buffer.getValueAtTime(0.05)).to.be.closeTo(4, 0.1);
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| 72 | });
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| 73 | });
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| 74 |
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| 75 | it("can unsync the frequency to the transport", () => {
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| 76 | return Offline(({ transport }) => {
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| 77 | const tremolo = new Tremolo(2);
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| 78 | tremolo.sync();
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| 79 | tremolo.frequency.toDestination();
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| 80 | transport.bpm.setValueAtTime(transport.bpm.value * 2, 0.05);
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| 81 | tremolo.unsync();
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| 82 | }, 0.1).then((buffer) => {
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| 83 | expect(buffer.getValueAtTime(0)).to.be.closeTo(2, 0.1);
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| 84 | expect(buffer.getValueAtTime(0.05)).to.be.closeTo(2, 0.1);
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| 85 | });
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| 86 | });
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| 87 | });
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| 88 | });
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