import { uniquePaths2 } from '../UniquePaths2'

describe('Unique Paths2', () => {
  // Should return number of ways, taken into account the obstacles
  test('There are obstacles in the way', () => {
    expect(
      uniquePaths2([
        [0, 0, 0],
        [0, 1, 0],
        [0, 0, 0]
      ])
    ).toEqual(2)
    expect(
      uniquePaths2([
        [0, 0, 0],
        [0, 1, 0],
        [0, 0, 0],
        [1, 0, 0]
      ])
    ).toEqual(3)
  })
  // Should return number of all possible ways to reach right-bottom corner
  test('There are no obstacles in the way', () => {
    expect(
      uniquePaths2([
        [0, 0, 0],
        [0, 0, 0],
        [0, 0, 0]
      ])
    ).toEqual(6)
    expect(
      uniquePaths2([
        [0, 0, 0],
        [0, 0, 0]
      ])
    ).toEqual(3)
  })
  // Should throw an exception b/c input data has wrong type
  test('There are wrong type of input data', () => {
    expect(() => uniquePaths2('wrong input')).toThrow()
    expect(() => uniquePaths2(100)).toThrow()
  })
})