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December 14, 2020 10:11
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TDD en JavaScript 1 - Introduction
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| const assert = require('assert') | |
| // Type your code here | |
| const capitalizeFirstLetters =(input)=>{ | |
| // return input.length && !input.includes(' ') > 0 ? input[0].toUpperCase() + input.slice(1): ''; | |
| // first code version | |
| let output = ''; | |
| if (input.length >0 && !input.includes(' ') ){ | |
| for (let i = 0 ; i < input.length ; i++) { | |
| if (i === 0) { | |
| output += input[0].toUpperCase(); | |
| } else { | |
| output += input[i]; | |
| } | |
| } | |
| }else if (input.length >0 && input.includes(' ')){ | |
| let inputSplit=input .split(' '); | |
| outputSplit = inputSplit.map(e =>( | |
| e[0].toUpperCase()+ e.slice(1)) | |
| ); | |
| output = outputSplit.join(' '); | |
| console.log(output) | |
| } | |
| else { | |
| output ='' | |
| } | |
| return output | |
| } | |
| // ************* tests | |
| // test1: check that capitalizeFirstLetters is a function | |
| assert.strictEqual(typeof capitalizeFirstLetters, 'function'); | |
| // test2: check that capitalizeFirstLetters takes one argument | |
| assert.strictEqual(capitalizeFirstLetters.length, 1) | |
| // // test3: check that capitalizeFirstLetters argument is a string | |
| // assert.strictEqual(typeof input, 'string'); | |
| // test4: Check that capitalizeFirstLetters transforms javaScript correctly | |
| assert.strictEqual(capitalizeFirstLetters('javaScript'), 'JavaScript'); | |
| // test5: Check that it works for a 1-character string | |
| assert.strictEqual(capitalizeFirstLetters('z'), 'Z'); | |
| // test6: Check that it works for i am learning TDD | |
| assert.strictEqual(capitalizeFirstLetters('i am learning TDD'), 'I Am Learning TDD'); | |
| // test7: Check that it works for an empty string | |
| assert.strictEqual(capitalizeFirstLetters(''), ''); |
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