import { checkWordOccurrence } from './CheckWordOccurrence';
describe('checkWordOccurrence', () => {
  it('expects throw on insert wrong string', () => {
    const value = 123;
    expect(() => checkWordOccurrence(value)).toThrow();
  });
  it('expect throw on insert wrong param for case sensitive', () => {
    const value = 'hello';
    expect(() => checkWordOccurrence(value, value)).toThrow();
  });
  it('check occurrence with case sensitive', () => {
    const stringToTest = "A Mad World";
    const charsOccurrences = checkWordOccurrence(stringToTest, true);
    const expectResult = { A: 1, M: 1, a: 1, d: 2, W: 1, l: 1, o: 1, r: 1 };
    const occurrencesObjectKeys = Object.keys(charsOccurrences);
    const expectObjectKeys = Object.keys(expectResult);
    expect(occurrencesObjectKeys.length).toBe(expectObjectKeys.length);
    expectObjectKeys.forEach(key => {
      expect(expectResult[key]).toBe(charsOccurrences[key]);
    });
  });
  it('check occurrence with case insensitive', () => {
    const stringToTest = "A Mad World";
    const charsOccurrences = checkWordOccurrence(stringToTest, false);
    const expectResult = { A: 2, D: 2, L: 1, M: 1, O: 1, R: 1, W: 1 };
    const occurrencesObjectKeys = Object.keys(charsOccurrences);
    const expectObjectKeys = Object.keys(expectResult);
    expect(occurrencesObjectKeys.length).toBe(expectObjectKeys.length);
    expectObjectKeys.forEach(key => {
      expect(expectResult[key]).toBe(charsOccurrences[key]);
    });

  });
});