Capitalize Test

capitalize.js

/**
 * capitalize.js
 * 
 * @param {string} str 
 * @returns string
 */
function capitalize(str) {
}

module.exports = { capitalize };

capitalize.test.js

/**
 * capitalize.test.js
 * 
 * npx jest --runTestsByPath capitalize.test.js
 */

const { capitalize } = require('./capitalize.js');

describe('Capitalize', function () {
  it('Single Word', function () {
    expect(capitalize("hello")).toEqual("Hello");
  });

  it('Multiple Words', function () {
    expect(capitalize("hello world")).toEqual("Hello World");
  });

  it('Outter Spaces', function () {
    expect(capitalize("  hello world  ")).toEqual("Hello World");
  });

  it('Inner Spaces', function () {
    expect(capitalize("hello   world")).toEqual("Hello World");
  });

  it('Multiple UpperCase', function () {
    expect(capitalize("heLLo woRLd")).toEqual("Hello World");
  });

  it('All In', function () {
    expect(capitalize("  heLLo   woRLd  ")).toEqual("Hello World");
  });
});

jest.config.json

{ "verbose": true }