import { get, allGet, prefixGet, memoizeGet } from '../get';

describe('get', () => {
  test('returns a deeply nested value', () => {
    const a = get(
      {
        colors: {
          blue: ['#0cf', '#0be', '#09d', '#07c'],
        },
      },
      'colors.blue.3'
    );
    expect(a).toBe('#07c');
  });

  test('supports fallback values', () => {
    const a = get({}, 'hi', 'nope');
    expect(a).toBe('nope');
  });

  test('handles number values', () => {
    const a = get([1, 2, 3], 0);
    expect(a).toBe(1);
  });

  test('handles undefined values', () => {
    const a = get({});
    expect(a).toBeUndefined();
  });

  test('handles null values', () => {
    const a = get({}, null);
    expect(a).toBeUndefined();
  });

  test('returns 0 index items', () => {
    const a = get(['a', 'b', 'c'], 0);
    expect(a).toBe('a');
  });
});

describe('get with prefix', () => {
  test('returns number values with $', () => {
    const a = prefixGet([0, 4, 8], '$2');
    expect(a).toBe(8);
  });
});

describe('get with prefix or without', () => {
  test('returns number values with $', () => {
    const a = allGet([0, 4, 8], '$2');
    expect(a).toBe(8);
    const b = allGet([0, 4, 8], 2);
    expect(b).toBe(8);
  });
});

test('memoize', () => {
  const obj = {
    colors: {
      blue: ['#0cf', '#0be', '#09d', '#07c'],
    },
  };
  const _get = jest.fn(() => true);
  const memoizedGet = memoizeGet(_get);
  expect(memoizedGet(obj, 'colors.blue.3')).toStrictEqual(true);
  expect(memoizedGet(obj, 'colors.blue.3')).toStrictEqual(true);
  expect(memoizedGet(obj, 'colors.blue.3')).toStrictEqual(true);
  expect(_get).toHaveBeenCalledTimes(1);
});