import { useObservableSelector } from '../react/useObservableSelector';
import { renderHook } from '@testing-library/react-hooks';
import expect from 'expect';
import { from } from 'rxjs';

describe('useSelector', () => {
  it('should select value from observable state', (complete) => {
    const expected = [
      {
        value: 1,
      },
      {
        value: 2,
      },
    ];
    const subject = from(expected);
    const { result } = renderHook(() => useObservableSelector(subject, 'value'));

    let counter = 0;
    result.current.subscribe({
      next: (value) => {
        expect(value).toBe(expected[counter].value);
        counter++;
      },
      complete,
    });
  });
});