import counter from '../../app/scripts/core/Counter.es6';


describe('counter', () => {
  it('should handle initial state', () => {
    expect (
      counter(0, { type: 'INCREMENT_COUNTER' })
    ).toEqual(1);
  });

  it('should handle INCREMENT_COUNTER', () => {
    expect (
      counter(1, { type: 'INCREMENT_COUNTER' })
    ).toEqual(2);
  });

  it('should handle DECREMENT_COUNTER', () => {
    expect (
      counter(2, { type: 'DECREMENT_COUNTER' })
    ).toEqual(1);
  });

  it('should handle unknown action type', () => {
    expect (
        counter(1, { type: 'SOMETHING_ELSE' })
    ).toEqual(1);
  });
});