Legger til en WallType enum og tester

src/test/java/inf112/fiasko/roborally/WallTypeTest.java

@@ -0,0 +1,61 @@
+package inf112.fiasko.roborally;
+
+import inf112.fiasko.roborally.abstractions.TileType;
+import inf112.fiasko.roborally.abstractions.WallType;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+public class WallTypeTest {
+
+    @Test
+    public void getWallTypeIDForWallNormal() {
+        assertEquals(1, WallType.WALL_NORMAL.getWallTypeID());
+    }
+
+    @Test
+    public void getWallTypeFromWallNormalID() {
+        assertEquals(WallType.WALL_NORMAL, WallType.getWallTypeFromID(1));
+    }
+
+    @Test
+    public void getWallTypeIDForWallLaserSingle() {
+        assertEquals(3, WallType.WALL_LASER_SINGLE.getWallTypeID());
+    }
+
+    @Test
+    public void getWallTypeFromWallLaserSingleID() {
+        assertEquals(WallType.WALL_LASER_SINGLE, WallType.getWallTypeFromID(3));
+    }
+
+    @Test
+    public void allWallTypesIDConversionToIDAndBack() {
+        for (WallType type : WallType.values()) {
+            assertEquals(type, WallType.getWallTypeFromID(type.getWallTypeID()));
+        }
+    }
+
+    @Test
+    public void invalidWallTypeIDReturnsNull() {
+        assertNull(TileType.getTileTypeFromID(-1));
+    }
+
+    @Test
+    public void allWallsHaveUniqueId() {
+        /* This test is also done implicitly by the allTileTypesIDConversionToIDAndBack test, but that test may fail
+           even if this test passes, so this test is needed for clarity. */
+        Set<Integer> set = new HashSet<>();
+        List<Integer> list = new ArrayList<>();
+        for (WallType type : WallType.values()) {
+            set.add(type.getWallTypeID());
+            list.add(type.getWallTypeID());
+        }
+        assertEquals(list.size(), set.size());
+    }
+}