src/test/java/MonsterTest.java

@@ -18,6 +18,7 @@ public class MonsterTest {
 
     private Player mockPlayer = mock(Player.class);
     private World mockWorld = mock(World.class);
+    private Tile mockTile = mock(Tile.class);
 
     @BeforeEach
     void reset() {
@@ -192,4 +193,13 @@ public class MonsterTest {
         assertThat(true, equalTo(defaultShade.performAttack(Attacks.CHILL, mockPlayer)));
     }
 
+    @Test
+    void troll_wont_move_to_tile_with_wrong_biome() {
+        Position destination = new Position(1, 3);
+        when(mockTile.getBiome()).thenReturn(Biomes.COAST);
+        when(mockWorld.getTileAtPosition(destination)).thenReturn(mockTile);
+
+        assertThat(false, equalTo(defaultTroll.moveTo(destination, mockWorld)));
+    }
+
 }