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Commit 8a11916

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Merge pull request TheAlgorithms#735 from charliejmoore/title-case-conversion-tests
Title case conversion tests
2 parents 90b447c + ced6c89 commit 8a11916

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2 files changed

+67
-12
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2 files changed

+67
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‎Conversions/TitleCaseConversion.js

Lines changed: 16 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -1,19 +1,23 @@
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/*
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Problem statement and Explanation : https://www.codeproject.com/Tips/162540/Letter-Case-Conversion-Algorithms-Title-Case-Toggl
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Problem statement and Explanation : https://www.codeproject.com/Tips/162540/Letter-Case-Conversion-Algorithms-Title-Case-Toggl.
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[Title case](https://en.wikipedia.org/wiki/Title_case) is a style where all words are capitalized. Officially, title case
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does not capitalize some words, such as very short words like "a" or "is", but for the purposes of this function, a general approach
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is taken where all words are capitalized regarless of length.
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*/
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/**
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* The TitleCaseConversion converts a string into a title case string.
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* @param {String} inputString input string
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* @returns {String}
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* The titleCaseConversion function converts a string into a title case string.
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* @param {string} inputString The input string which can have any types of letter casing.
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* @returns {string} A string that is in title case.
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*/
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const TitleCaseConversion = (inputString) => {
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const titleCaseConversion = (inputString) => {
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if (inputString === '') return ''
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// Extact all space seprated string.
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const stringCollections = inputString.split(' ').map(word => {
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let firstChar = ''
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// Get a character code by the use charCodeAt method.
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// Get the [ASCII](https://en.wikipedia.org/wiki/ASCII) character code by the use charCodeAt method.
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const firstCharCode = word[0].charCodeAt()
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// If the character code lies between 97 to 122 it means they are in the lower case so convert it.
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// If the ASCII character code lies between 97 to 122 it means they are in the lowercase so convert it.
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if (firstCharCode >= 97 && firstCharCode <= 122) {
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// Convert the case by use of the above explanation.
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firstChar += String.fromCharCode(firstCharCode - 32)
@@ -22,21 +26,21 @@ const TitleCaseConversion = (inputString) => {
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firstChar += word[0]
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}
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const newWordChar = word.slice(1).split('').map(char => {
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// Get a character code by the use charCodeAt method.
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// Get the ASCII character code by the use charCodeAt method.
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const presentCharCode = char.charCodeAt()
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// If the character code lies between 65 to 90 it means they are in the upper case so convert it.
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// If the ASCII character code lies between 65 to 90, it means they are in the uppercase so convert it.
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if (presentCharCode >= 65 && presentCharCode <= 90) {
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// Convert the case by use of the above explanation.
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return String.fromCharCode(presentCharCode + 32)
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}
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// Else return the characters without any modification.
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return char
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})
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// return the first converted character and remaining character string.
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// Return the first converted character and remaining character string.
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return firstChar + newWordChar.join('')
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})
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// convert all words in a string and return it.
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// Convert all words in a string and return it.
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return stringCollections.join(' ')
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}
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module.exports=TitleCaseConversion
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export{titleCaseConversion}
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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,51 @@
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import { titleCaseConversion } from '../TitleCaseConversion'
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describe(('Tests for the titleCaseConversion function'), () => {
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it('should return an empty string when the input is an empty string', () => {
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expect(titleCaseConversion('')).toEqual('')
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})
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it('should return the input string when the input string is a title case string', () => {
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expect(titleCaseConversion('A Proper Title Case String')).toEqual('A Proper Title Case String')
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})
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it('should return a title case string when input is an all-uppercase string', () => {
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expect(titleCaseConversion('ALL UPPER CASE')).toEqual('All Upper Case')
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})
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it('should return a title case string when input is a title case string of with spaces', () => {
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expect(titleCaseConversion('ALL UPPERCASE')).toEqual('All Uppercase')
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})
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it('should return a title case string when input is a title case string of with no spaces', () => {
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expect(titleCaseConversion('ALLUPPERCASE')).toEqual('Alluppercase')
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})
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it('should return a title case string when input is a title case string with punctuation', () => {
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expect(titleCaseConversion('All Title Case!')).toEqual('All Title Case!')
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})
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it('should return a title case string when input is an all-lowercase string with no spaces', () => {
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expect(titleCaseConversion('lowercaseinput')).toEqual('Lowercaseinput')
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})
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it('should return a title case string when input is an all-lowercase string with spaces', () => {
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expect(titleCaseConversion('lowercase input')).toEqual('Lowercase Input')
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})
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it('should return a title case string when input is an all-lowercase string with punctuation', () => {
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expect(titleCaseConversion('lower, case, input.')).toEqual('Lower, Case, Input.')
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})
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it('should return a title case string when input is an mixed-case string', () => {
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expect(titleCaseConversion('mixeD CaSe INPuT')).toEqual('Mixed Case Input')
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})
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it('should return a title case string when input is an mixed-case string with no spaces', () => {
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expect(titleCaseConversion('mixeDCaSeINPuT')).toEqual('Mixedcaseinput')
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})
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it('should return a title case string when input is an mixed-case string with punctuation', () => {
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expect(titleCaseConversion('mixeD, CaSe, INPuT!')).toEqual('Mixed, Case, Input!')
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})
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})

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