public void ChangeDirectionThrowsArgumentOutOfRangeExceptionWhenInvalidEnumValueTest()
{
// arrange
var snakeElement = new SnakeElement(1, 1, DirectionOfMove.Up);
// act
// assert
Assert.Throws <ArgumentOutOfRangeException>(() => snakeElement.ChangeDirection((DirectionOfMove)100));
}
public void ChangeDirectionToUpValidConditionsTest()
{
// arrange
const DirectionOfMove expected = DirectionOfMove.Up;
var snakeElement = new SnakeElement(1, 1, DirectionOfMove.Right);
// act
snakeElement.ChangeDirection(expected);
snakeElement.Move();
// assert
Assert.AreEqual(expected, snakeElement.DirectionOfMove);
}
public void ChangeDirectionToLeftWhenCurrentIsRightTest()
{
// arrange
const DirectionOfMove expected = DirectionOfMove.Right;
var snakeElement = new SnakeElement(1, 1, DirectionOfMove.Right);
// act
snakeElement.ChangeDirection(DirectionOfMove.Left);
snakeElement.Move();
// assert
Assert.AreEqual(expected, snakeElement.DirectionOfMove);
}
public void ChangeDirectionToDownWhenCurrentIsUpTest()
{
// arrange
const DirectionOfMove expected = DirectionOfMove.Up;
var snakeElement = new SnakeElement(1, 1, DirectionOfMove.Up);
// act
snakeElement.ChangeDirection(DirectionOfMove.Down);
snakeElement.Move();
// assert
Assert.AreEqual(expected, snakeElement.DirectionOfMove);
}
public void ChangeDirectionToDownValidConditionsTest()
{
// arrange
const DirectionOfMove expected = DirectionOfMove.Down;
var snakeElement = new SnakeElement(0, 0, DirectionOfMove.Left);
// act
snakeElement.ChangeDirection(expected);
snakeElement.Move();
// assert
Assert.AreEqual(expected, snakeElement.DirectionOfMove);
}