Gjør det mulig å sjekke om to retninger står rett på hverandre

src/main/java/inf112/fiasko/roborally/element_properties/Direction.java

@@ -45,6 +45,17 @@ public enum Direction {
         return null;
     }
 
+    /**
+     * Checks whether two directions are perpendicular
+     * @param direction1 The first direction
+     * @param direction2 The second direction
+     * @return True if the directions are perpendicular
+     */
+    public static boolean arePerpendicular(Direction direction1, Direction direction2) {
+        return direction1.equals(getLeftRotatedDirection(direction2)) ||
+                direction1.equals(getRightRotatedDirection(direction2));
+    }
+
     /**
      * Gets the reverse of a direction
      * @param direction A direction

src/test/java/inf112/fiasko/roborally/element_properties/DirectionTest.java

@@ -8,7 +8,9 @@ import java.util.List;
 import java.util.Set;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
 
 public class DirectionTest {
 
@@ -176,4 +178,34 @@ public class DirectionTest {
     public void getLeftRotatedDirectionFromSouthWest() {
         assertEquals(Direction.SOUTH_EAST, Direction.getLeftRotatedDirection(Direction.SOUTH_WEST));
     }
+
+    @Test
+    public void eastAndWestArePerpendicular() {
+        assertFalse(Direction.arePerpendicular(Direction.EAST, Direction.WEST));
+    }
+
+    @Test
+    public void eastAndNorthArePerpendicular() {
+        assertTrue(Direction.arePerpendicular(Direction.EAST, Direction.NORTH));
+    }
+
+    @Test
+    public void eastAndSouthArePerpendicular() {
+        assertTrue(Direction.arePerpendicular(Direction.EAST, Direction.SOUTH));
+    }
+
+    @Test
+    public void northAndSouthArePerpendicular() {
+        assertFalse(Direction.arePerpendicular(Direction.NORTH, Direction.SOUTH));
+    }
+
+    @Test
+    public void northAndWestArePerpendicular() {
+        assertTrue(Direction.arePerpendicular(Direction.NORTH, Direction.WEST));
+    }
+
+    @Test
+    public void southAndWestArePerpendicular() {
+        assertTrue(Direction.arePerpendicular(Direction.SOUTH, Direction.WEST));
+    }
 }