From 7635c33d8aeb9e4d2c504bc6b31027844c90653b Mon Sep 17 00:00:00 2001
From: EpicKnarvik97 <kristian.knarvik@knett.no>
Date: Mon, 23 Mar 2020 12:45:50 +0100
Subject: [PATCH] =?UTF-8?q?Gj=C3=B8r=20det=20mulig=20=C3=A5=20sjekke=20om?=
 =?UTF-8?q?=20to=20retninger=20st=C3=A5r=20rett=20p=C3=A5=20hverandre?=
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---
 .../element_properties/Direction.java         | 11 +++++++
 .../element_properties/DirectionTest.java     | 32 +++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/src/main/java/inf112/fiasko/roborally/element_properties/Direction.java b/src/main/java/inf112/fiasko/roborally/element_properties/Direction.java
index 1cd11cc..484a62b 100644
--- a/src/main/java/inf112/fiasko/roborally/element_properties/Direction.java
+++ b/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
diff --git a/src/test/java/inf112/fiasko/roborally/element_properties/DirectionTest.java b/src/test/java/inf112/fiasko/roborally/element_properties/DirectionTest.java
index 357aa66..38e767f 100644
--- a/src/test/java/inf112/fiasko/roborally/element_properties/DirectionTest.java
+++ b/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));
+    }
 }