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163 lines
5.1 KiB
TypeScript
163 lines
5.1 KiB
TypeScript
/*
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Copyright 2021 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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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 = -0.10;
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const max = +0.10;
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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', () => { // 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(1.40);
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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(-1.40);
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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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});
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});
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