public void HasWinner_ThrowsArgumentInvalidException_WhenBoardIsNull()
{
// Act
void action() => Question16_4.HasWinner(null);
// Assert
TestHelpers.AssertExceptionThrown(action, typeof(ArgumentNullException));
}
public void HasWinner_ReturnsFalse_ForEmptyBoard()
{
// Arrange
var board = new int?[3, 3];
// Act
var result = Question16_4.HasWinner(board);
// Assert
Assert.IsFalse(result);
}
public void HasWinner_ReturnsFalse_WithMultiplePlayersInSameRow()
{
// Arrange
var board = new int?[3, 3];
board[0, 0] = 1;
board[0, 1] = 1;
board[0, 2] = 2;
// Act
var result = Question16_4.HasWinner(board);
// Assert
Assert.IsFalse(result);
}
public void HasWinner_ReturnsTrue_ForTopRightToBottomLeftWin()
{
// Arrange
var board = new int?[3, 3];
board[0, 2] = 1;
board[1, 1] = 1;
board[2, 0] = 1;
// Act
var result = Question16_4.HasWinner(board);
// Assert
Assert.IsTrue(result);
}
public void HasWinner_ReturnsTrue_ForVerticalWin()
{
// Arrange
var board = new int?[3, 3];
board[0, 0] = 1;
board[0, 1] = 1;
board[0, 2] = 1;
// Act
var result = Question16_4.HasWinner(board);
// Assert
Assert.IsTrue(result);
}
