@Test
public void ValidPuzzle_Solve_NoNullValues() {


    //Arrange & Act
    Puzzle solvedPuzzle = solvePuzzle(getPuzzle());

    //Assert
    for (int x = 0; x < Puzzle.SIZE; x++) {
        for (int y = 0; y < Puzzle.SIZE; y++) {
            Point currentPoint = new Point(x, y);
            Assert.assertNotNull(solvedPuzzle.getNumber(currentPoint));
        }
    }
}