Convert text to scripting cases

index.js

/**
 * Change case of text to common programming language cases.
 * @param {string} text - Text to change case. May contain spaces, special characters, etc.
 * @param {string} caseType - Type of case to change to. Possible values are:
 * - camelCase
 * - PascalCase
 * - snake_case
 * - kebab-case
 * - CONSTANT_CASE
 * - TitleCase
 * @returns {string} - Text with case changed to the specified case type.
 */
function changeCase(text, caseType) {
    if (caseType === 'camelCase') {
        return text
        .replace(/\s(.)/g, ($1) => $1.toUpperCase())
        .replace(/\s/g, '')
        .replace(/^(.)/, ($1) => $1.toLowerCase());
    } else if (caseType === 'PascalCase') {
        return text
        .replace(/\s(.)/g, ($1) => $1.toUpperCase())
        .replace(/\s/g, '')
        .replace(/^(.)/, ($1) => $1.toUpperCase());
    } else if (caseType === 'snake_case') {
        return text
        .replace(/\s/g, '_')
        .replace(/([A-Z])/g, ($1) => '_' + $1.toLowerCase())
        .replace(/^_/, '');
    } else if (caseType === 'kebab-case') {
        return text
        .replace(/\s/g, '-')
        .replace(/([A-Z])/g, ($1) => '-' + $1.toLowerCase())
        .replace(/^-/, '');
    } else if (caseType === 'CONSTANT_CASE') {
        return text
        .replace(/\s/g, '_')
        .replace(/([A-Z])/g, ($1) => '_' + $1)
        .replace(/^_/, '')
        .toUpperCase();
    } else if (caseType === 'TitleCase') {
        return text
        .replace(/\b\w/g, ($1) => $1.toUpperCase())
        .replace(/\s/g, '');
    } else {
        return text;
    }
}

const sampleText = 'This is a sample text';

function it(description, test) {
    console.log(description + ' - ' + (test() ? 'PASSED' : 'FAILED'));
}

it('camelCase', () => changeCase(sampleText, 'camelCase') === 'thisIsASampleText');
it('PascalCase', () => changeCase(sampleText, 'PascalCase') === 'ThisIsASampleText');
it('snake_case', () => changeCase(sampleText, 'snake_case') === 'this_is_a_sample_text');
it('kebab-case', () => changeCase(sampleText, 'kebab-case') === 'this-is-a-sample-text');
it('CONSTANT_CASE', () => changeCase(sampleText, 'CONSTANT_CASE') === 'THIS_IS_A_SAMPLE_TEXT');
it('TitleCase', () => changeCase(sampleText, 'TitleCase') === 'ThisIsASampleText');