const expect = require('expect');
const toKebabCase = require('./toKebabCase.js');

test('toKebabCase is a Function', () => {
  expect(toKebabCase).toBeInstanceOf(Function);
});
test('toKebabCase(\'camelCase\') returns camel-case', () => {
  expect(toKebabCase('camelCase')).toBe('camel-case');
});
test('toKebabCase(\'some text\') returns some-text', () => {
  expect(toKebabCase('some text')).toBe('some-text');
});
test('toKebabCase(\'some-mixed-string With spaces-underscores-and-hyphens\') returns some-mixed-string-with-spaces-underscores-and-hyphens', () => {
  expect(toKebabCase('some-mixed-string With spaces-underscores-and-hyphens')).toBe('some-mixed-string-with-spaces-underscores-and-hyphens');
});
test('toKebabCase(\'IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML\') returns i-am-listening-to-fm-while-loading-different-url-on-my-browser-and-also-editing-some-xml-and-html', () => {
  expect(toKebabCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML')).toBe('i-am-listening-to-fm-while-loading-different-url-on-my-browser-and-also-editing-some-xml-and-html');
});
test('toKebabCase() returns undefined', () => {
  expect(toKebabCase()).toBe(undefined);
});
test('toKebabCase([]) throws an erro', () => {
  expect(() => { toKebabCase([]); }).toThrow();
});
test('toKebabCase({}) throws an erro', () => {
  expect(() => { toKebabCase({}); }).toThrow();
});
test('toKebabCase(123) throws an erro', () => {
  expect(() => { toKebabCase(123); }).toThrow();
});
let start = new Date().getTime();
toKebabCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML');
let end = new Date().getTime();
test('toKebabCase(IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML) takes less than 2s to run', () => {
  expect((end - start) < 2000).toBeTruthy();
});