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Commit 6291d4b

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feat: Add Length Conversion (TheAlgorithms#1390)
1 parent 0604d06 commit 6291d4b

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2 files changed

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‎Conversions/LengthConversion.js‎

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/**
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* Converts a length from one unit to another.
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*
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* @param {number} length - The length to convert.
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* @param {string} fromUnit - The unit to convert from (e.g., "km", "m", "cm").
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* @param {string} toUnit - The unit to convert to (e.g., "km", "m", "cm").
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* @returns {number} The converted length.
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* @throws {Error} If the units are invalid or not found in the conversion dictionary.
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*/
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const lengthConversion = (length, fromUnit, toUnit) => {
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// Define a dictionary to map units to meters
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const meters = {
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mm: 0.001,
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cm: 0.01,
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m: 1,
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km: 1000,
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inch: 0.0254,
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ft: 0.3048,
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yd: 0.9144,
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mi: 1609.34
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}
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// Check if the units are in the dictionary, otherwise, throw an error
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if (!(fromUnit in meters) || !(toUnit in meters)) {
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throw new Error('Invalid units')
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}
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// Perform the conversion
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const metersFrom = length * meters[fromUnit]
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const convertedLength = metersFrom / meters[toUnit]
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return convertedLength
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}
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export {
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lengthConversion
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}
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import { lengthConversion } from '../LengthConversion.js'
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describe('LengthConversion', () => {
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it.each`
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length | fromUnit | toUnit | expected
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${10} | ${'km'} | ${'m'} | ${10000}
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${100} | ${'m'} | ${'km'} | ${0.1}
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${5} | ${'cm'} | ${'mm'} | ${50}
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${12} | ${'ft'} | ${'inch'}| ${144.00000000000003}
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`(
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'converts $length $fromUnit to $toUnit',
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({ length, fromUnit, toUnit, expected }) => {
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try {
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const result = lengthConversion(length, fromUnit, toUnit)
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expect(result).toBe(expected)
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} catch (error) {
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expect(error).toBeUndefined()
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}
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}
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)
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it.each`
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length | fromUnit | toUnit | expected
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${10} | ${'m'} | ${'km'} | ${0.01}
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${1000}| ${'mm'} | ${'cm'} | ${100}
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${1} | ${'inch'}| ${'ft'} | ${0.08333333333}
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`(
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'converts $length $fromUnit to $toUnit (vice versa)',
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({ length, fromUnit, toUnit, expected }) => {
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try {
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const result = lengthConversion(length, fromUnit, toUnit)
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expect(result).toBeCloseTo(expected, 10) // Close comparison due to floating-point precision
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} catch (error) {
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expect(error).toBeUndefined()
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}
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}
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)
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it.each`
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length | fromUnit | toUnit | expectedError
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${10} | ${'km'} | ${'invalid'} | ${'Invalid units'}
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${5} | ${'invalid'} | ${'m'} | ${'Invalid units'}
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`(
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'returns error message for invalid units: $fromUnit to $toUnit',
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({ length, fromUnit, toUnit, expectedError }) => {
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try {
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lengthConversion(length, fromUnit, toUnit)
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} catch (error) {
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expect(error.message).toBe(expectedError)
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}
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}
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)
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})

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