# test.py
"""
Unit tests for the Sudoku package.

This module includes unit tests for the functions and classes in the Sudoku
package using the unittest module.
"""
import unittest
from sudoku_board import SudokuBoard, generate_board
from sudoku_solver import SudokuSolver, solve_board
from sudoku_utils import is_valid_move

class TestSudoku(unittest.TestCase):
    """
    Test cases for the Sudoku package.

    Test methods:
        test_generate_board
        test_solve_board
        test_is_valid_move
        # ... (add more test methods)
    """
    def setUp(self):
        """
        Set up common resources for testing.

        This method is called before each test method to set up any common
        resources needed for testing, such as creating a new SudokuBoard object.
        """
        self.sudoku_board = SudokuBoard()

    def test_generate_board(self):
        """
        Test the generation of a Sudoku board.

        This test case ensures that the generate_board function generates a
        Sudoku board and that the board is fully filled according to the
        specified difficulty level.
        """
        generate_board(self.sudoku_board.board, difficulty=30)
        self.assertTrue(self.sudoku_board.is_board_full())

    def test_solve_board(self):
        """
        Test the solution of a Sudoku board.

        This test case ensures that the solve_board function successfully
        solves a Sudoku board, leaving no empty cells.
        """
        generate_board(self.sudoku_board.board, difficulty=30)
        solver = SudokuSolver(self.sudoku_board.board)
        solve_board(solver)
        self.assertTrue(self.sudoku_board.is_board_full())

    def test_is_valid_move(self):
        """
        Test the validation of a move in the Sudoku board.

        This test case checks that the is_valid_move function correctly
        determines whether placing a number in a specific cell is a valid move.
        """
        generate_board(self.sudoku_board.board, difficulty=30)
        self.assertTrue(is_valid_move(self.sudoku_board.board, 0, 0, 1))
        self.assertFalse(is_valid_move(self.sudoku_board.board, 0, 0, 2))

    # Add more test cases as needed

if __name__ == '__main__':
    unittest.main()