/// <summary>
/// If the calling DirectionEnum has more than one flag set, then verify that his directions are actually possible (cannot got upright if there is an obstacle on up OR right)
/// </summary>
/// <param name="direction">calling object</param>
/// <param name="toCompare">possible directions (up, right, down, left) set to 1 if particular direction is possible</param>
/// <returns>true if monodirectional or possible multidirectional. False if not possible multidirectional.</returns>
public static bool IsPossibleDirection(this DirectionEnum direction, DirectionEnum toCompare)
{
if (!direction.HasMoreThan1Direction())
{
return(true);
}
if ((toCompare & direction) == direction)
{
return(true);
}
return(false);
}
public void Direction_MonodirectionalShouldBeDetected()
{
//Arrange
DirectionEnum down = DirectionEnum.Down,
up = DirectionEnum.Up,
right = DirectionEnum.Right,
left = DirectionEnum.Left;
//Act
var testDown = down.HasMoreThan1Direction();
var testUp = up.HasMoreThan1Direction();
var testRight = right.HasMoreThan1Direction();
var testLeft = left.HasMoreThan1Direction();
//Assert
Assert.False(testDown | testUp | testRight | testLeft);
}
public void Direction_BidirectionShouldBeDetected()
{
//Arrange
DirectionEnum down_left = (DirectionEnum.Down | DirectionEnum.Left),
up_right = (DirectionEnum.Up | DirectionEnum.Right),
down_right = (DirectionEnum.Down | DirectionEnum.Right),
up_left = (DirectionEnum.Up | DirectionEnum.Left);
//Act
var testDownLeft = down_left.HasMoreThan1Direction();
var testUpRight = up_right.HasMoreThan1Direction();
var testDownRight = down_right.HasMoreThan1Direction();
var testUpLeft = up_left.HasMoreThan1Direction();
//Assert
Assert.True(testDownLeft & testUpRight & testDownRight & testUpLeft);
}
