pangram.spec.js

import { isPangram } from './pangram';

describe('Pangram()', () => {
  test('empty sentence', () => {
    expect(isPangram('')).toBe(false);
  });

  test('perfect lower case', () => {
    expect(isPangram('abcdefghijklmnopqrstuvwxyz')).toBe(true);
  });

  test('only lower case', () => {
    expect(isPangram('the quick brown fox jumps over the lazy dog')).toBe(true);
  });

  test("missing the letter 'x'", () => {
    expect(
      isPangram('a quick movement of the enemy will jeopardize five gunboats')
    ).toBe(false);
  });

  test("missing the letter 'h'", () => {
    expect(isPangram('five boxing wizards jump quickly at it')).toBe(false);
  });

  test('with underscores', () => {
    expect(isPangram('the_quick_brown_fox_jumps_over_the_lazy_dog')).toBe(true);
  });

  test('with numbers', () => {
    expect(isPangram('the 1 quick brown fox jumps over the 2 lazy dogs')).toBe(
      true
    );
  });

  test('missing letters replaced by numbers', () => {
    expect(isPangram('7h3 qu1ck brown fox jumps ov3r 7h3 lazy dog')).toBe(
      false
    );
  });

  test('mixed case and punctuation', () => {
    expect(isPangram('"Five quacking Zephyrs jolt my wax bed."')).toBe(true);
  });

  test('case insensitive', () => {
    expect(isPangram('the quick brown fox jumps over with lazy FX')).toBe(
      false
    );
  });
});