112 lines
3.3 KiB
JavaScript
112 lines
3.3 KiB
JavaScript
import {
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formatRelevantDigits,
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bytesToKiB,
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bytesToMiB,
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bytesToGiB,
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numberToHumanSize,
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sum,
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isOdd,
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} from '~/lib/utils/number_utils';
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describe('Number Utils', () => {
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describe('formatRelevantDigits', () => {
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it('returns an empty string when the number is NaN', () => {
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expect(formatRelevantDigits('fail')).toBe('');
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});
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it('returns 4 decimals when there is 4 plus digits to the left', () => {
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const formattedNumber = formatRelevantDigits('1000.1234567');
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const rightFromDecimal = formattedNumber.split('.')[1];
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const leftFromDecimal = formattedNumber.split('.')[0];
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expect(rightFromDecimal.length).toBe(4);
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expect(leftFromDecimal.length).toBe(4);
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});
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it('returns 3 decimals when there is 1 digit to the left', () => {
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const formattedNumber = formatRelevantDigits('0.1234567');
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const rightFromDecimal = formattedNumber.split('.')[1];
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const leftFromDecimal = formattedNumber.split('.')[0];
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expect(rightFromDecimal.length).toBe(3);
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expect(leftFromDecimal.length).toBe(1);
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});
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it('returns 2 decimals when there is 2 digits to the left', () => {
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const formattedNumber = formatRelevantDigits('10.1234567');
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const rightFromDecimal = formattedNumber.split('.')[1];
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const leftFromDecimal = formattedNumber.split('.')[0];
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expect(rightFromDecimal.length).toBe(2);
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expect(leftFromDecimal.length).toBe(2);
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});
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it('returns 1 decimal when there is 3 digits to the left', () => {
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const formattedNumber = formatRelevantDigits('100.1234567');
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const rightFromDecimal = formattedNumber.split('.')[1];
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const leftFromDecimal = formattedNumber.split('.')[0];
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expect(rightFromDecimal.length).toBe(1);
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expect(leftFromDecimal.length).toBe(3);
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});
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});
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describe('bytesToKiB', () => {
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it('calculates KiB for the given bytes', () => {
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expect(bytesToKiB(1024)).toEqual(1);
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expect(bytesToKiB(1000)).toEqual(0.9765625);
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});
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});
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describe('bytesToMiB', () => {
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it('calculates MiB for the given bytes', () => {
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expect(bytesToMiB(1048576)).toEqual(1);
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expect(bytesToMiB(1000000)).toEqual(0.95367431640625);
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});
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});
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describe('bytesToGiB', () => {
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it('calculates GiB for the given bytes', () => {
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expect(bytesToGiB(1073741824)).toEqual(1);
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expect(bytesToGiB(10737418240)).toEqual(10);
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});
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});
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describe('numberToHumanSize', () => {
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it('should return bytes', () => {
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expect(numberToHumanSize(654)).toEqual('654 bytes');
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});
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it('should return KiB', () => {
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expect(numberToHumanSize(1079)).toEqual('1.05 KiB');
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});
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it('should return MiB', () => {
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expect(numberToHumanSize(10485764)).toEqual('10.00 MiB');
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});
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it('should return GiB', () => {
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expect(numberToHumanSize(10737418240)).toEqual('10.00 GiB');
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});
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});
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describe('sum', () => {
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it('should add up two values', () => {
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expect(sum(1, 2)).toEqual(3);
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});
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it('should add up all the values in an array when passed to a reducer', () => {
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expect([1, 2, 3, 4, 5].reduce(sum)).toEqual(15);
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});
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});
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describe('isOdd', () => {
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it('should return 0 with a even number', () => {
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expect(isOdd(2)).toEqual(0);
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});
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it('should return 1 with a odd number', () => {
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expect(isOdd(1)).toEqual(1);
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});
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});
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});
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