mirror of
https://github.com/Tonejs/Tone.js
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49 lines
1.3 KiB
TypeScript
49 lines
1.3 KiB
TypeScript
import { ConstantOutput } from "test/helper/ConstantOutput";
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import { ScaleExp } from "./ScaleExp";
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import { BasicTests } from "test/helper/Basic";
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import { Signal } from "Tone/signal/Signal";
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import { expect } from "chai";
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describe("ScaleExp", () => {
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BasicTests(ScaleExp);
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context("Scaling", () => {
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it("can set the min and max values", () => {
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const scale = new ScaleExp(-20, 10, 2);
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scale.min = -0.01;
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expect(scale.min).to.be.closeTo(-0.01, 0.001);
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scale.max = 1000;
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expect(scale.max).to.be.closeTo(1000, 0.001);
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scale.dispose();
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});
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it("can set the exponent value", () => {
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const scale = new ScaleExp(0, 100, 2);
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expect(scale.exponent).to.be.closeTo(2, 0.001);
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scale.exponent = 3;
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expect(scale.exponent).to.be.closeTo(3, 0.001);
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scale.dispose();
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});
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it("scales a signal between two values exponentially", () => {
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return ConstantOutput(() => {
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const signal = new Signal(0.5);
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const scale = new ScaleExp(0, 1, 3);
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signal.connect(scale);
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scale.toDestination();
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}, 0.125);
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});
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it("scale a signal between 1 and 3 exponentially", () => {
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return ConstantOutput(() => {
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const signal = new Signal(0.5);
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const scale = new ScaleExp(1, 3, 2);
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signal.connect(scale);
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scale.toDestination();
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}, 1.5);
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});
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});
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});
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