import { Sudoku } from '../Sudoku'

const data = [

[3, 0, 6, 5, 0, 8, 4, 0, 0],

[5, 2, 0, 0, 0, 0, 0, 0, 0],

[0, 8, 7, 0, 0, 0, 0, 3, 1],

[0, 0, 3, 0, 1, 0, 0, 8, 0],

[9, 0, 0, 8, 6, 3, 0, 0, 5],

[0, 5, 0, 0, 9, 0, 6, 0, 0],

[1, 3, 0, 0, 0, 0, 2, 5, 0],

[0, 0, 0, 0, 0, 0, 0, 7, 4],

[0, 0, 5, 2, 0, 6, 3, 0, 0]

]

const solved = [

[3, 1, 6, 5, 7, 8, 4, 9, 2],

[5, 2, 9, 1, 3, 4, 7, 6, 8],

[4, 8, 7, 6, 2, 9, 5, 3, 1],

[2, 6, 3, 4, 1, 5, 9, 8, 7],

[9, 7, 4, 8, 6, 3, 1, 2, 5],

[8, 5, 1, 7, 9, 2, 6, 4, 3],

[1, 3, 8, 9, 4, 7, 2, 5, 6],

[6, 9, 2, 3, 5, 1, 8, 7, 4],

[7, 4, 5, 2, 8, 6, 3, 1, 9]

]

describe('Sudoku', () => {

it('should create a valid board successfully', () => {

// we deliberately want to check whether this constructor call fails or not

// eslint-disable-next-line no-new

expect(() => {

new Sudoku(data)

}).not.toThrow()

})

it('should find an empty cell', () => {

const board = new Sudoku(data)

const emptyCell = board.findEmptyCell()

expect(emptyCell).not.toEqual([-1, -1])

})

it('should solve the board successfully', () => {

const board = new Sudoku(data)

board.solve()

// should not have empty cells anymore

const emptyCell = board.findEmptyCell()

expect(emptyCell).toEqual([-1, -1])

// solved board should match our expectation

for (let i = 0; i < 9; i++) {

const section = board.getSection(i, [0, 9])

expect(section).toEqual(solved[i])

}

})

})