160 lines
4.8 KiB
TypeScript
160 lines
4.8 KiB
TypeScript
/*
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Copyright 2024 New Vector Ltd.
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Copyright 2021 The Matrix.org Foundation C.I.C.
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
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Please see LICENSE files in the repository root for full details.
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*/
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import { clamp, defaultNumber, percentageOf, percentageWithin, sum } from "../../src/utils/numbers";
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describe("numbers", () => {
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describe("defaultNumber", () => {
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it("should use the default when the input is not a number", () => {
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const def = 42;
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let result = defaultNumber(null, def);
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expect(result).toBe(def);
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result = defaultNumber(undefined, def);
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expect(result).toBe(def);
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result = defaultNumber(Number.NaN, def);
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expect(result).toBe(def);
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});
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it("should use the number when it is a number", () => {
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const input = 24;
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const def = 42;
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const result = defaultNumber(input, def);
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expect(result).toBe(input);
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});
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});
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describe("clamp", () => {
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it("should clamp high numbers", () => {
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const input = 101;
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const min = 0;
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const max = 100;
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const result = clamp(input, min, max);
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expect(result).toBe(max);
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});
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it("should clamp low numbers", () => {
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const input = -1;
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const min = 0;
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const max = 100;
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const result = clamp(input, min, max);
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expect(result).toBe(min);
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});
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it("should not clamp numbers in range", () => {
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const input = 50;
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const min = 0;
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const max = 100;
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const result = clamp(input, min, max);
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expect(result).toBe(input);
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});
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it("should clamp floats", () => {
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const min = -0.1;
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const max = +0.1;
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let result = clamp(-1.2, min, max);
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expect(result).toBe(min);
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result = clamp(1.2, min, max);
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expect(result).toBe(max);
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result = clamp(0.02, min, max);
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expect(result).toBe(0.02);
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});
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});
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describe("sum", () => {
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it("should sum", () => {
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// duh
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const result = sum(1, 2, 1, 4);
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expect(result).toBe(8);
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});
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});
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describe("percentageWithin", () => {
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it("should work within 0-100", () => {
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const result = percentageWithin(0.4, 0, 100);
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expect(result).toBe(40);
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});
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it("should work within 0-100 when pct > 1", () => {
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const result = percentageWithin(1.4, 0, 100);
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expect(result).toBe(140);
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});
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it("should work within 0-100 when pct < 0", () => {
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const result = percentageWithin(-1.4, 0, 100);
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expect(result).toBe(-140);
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});
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it("should work with ranges other than 0-100", () => {
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const result = percentageWithin(0.4, 10, 20);
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expect(result).toBe(14);
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});
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it("should work with ranges other than 0-100 when pct > 1", () => {
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const result = percentageWithin(1.4, 10, 20);
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expect(result).toBe(24);
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});
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it("should work with ranges other than 0-100 when pct < 0", () => {
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const result = percentageWithin(-1.4, 10, 20);
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expect(result).toBe(-4);
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});
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it("should work with floats", () => {
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const result = percentageWithin(0.4, 10.2, 20.4);
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expect(result).toBe(14.28);
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});
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});
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// These are the inverse of percentageWithin
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describe("percentageOf", () => {
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it("should work within 0-100", () => {
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const result = percentageOf(40, 0, 100);
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expect(result).toBe(0.4);
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});
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it("should work within 0-100 when val > 100", () => {
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const result = percentageOf(140, 0, 100);
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expect(result).toBe(1.4);
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});
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it("should work within 0-100 when val < 0", () => {
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const result = percentageOf(-140, 0, 100);
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expect(result).toBe(-1.4);
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});
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it("should work with ranges other than 0-100", () => {
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const result = percentageOf(14, 10, 20);
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expect(result).toBe(0.4);
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});
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it("should work with ranges other than 0-100 when val > 100", () => {
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const result = percentageOf(24, 10, 20);
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expect(result).toBe(1.4);
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});
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it("should work with ranges other than 0-100 when val < 0", () => {
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const result = percentageOf(-4, 10, 20);
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expect(result).toBe(-1.4);
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});
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it("should work with floats", () => {
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const result = percentageOf(14.28, 10.2, 20.4);
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expect(result).toBe(0.4);
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});
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it("should return 0 for values that cause a division by zero", () => {
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expect(percentageOf(0, 0, 0)).toBe(0);
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});
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});
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});
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