imports to lib.rs, creating unit tests

tests/map_test.rs

@@ -0,0 +1,22 @@
+// tests/map_test.rs
+use rust_rl::map::TileType;
+
+#[test]
+fn tiletype_equality() {
+    let tile1 = TileType::ImpassableMountain;
+    let tile2 = TileType::ImpassableMountain;
+    assert_eq!(tile1, tile2);
+
+    let tile3 = TileType::Floor;
+    assert_ne!(tile1, tile3);
+}
+
+#[test]
+fn tiletype_with_var_equality() {
+    let tile1 = TileType::ToLocal(5);
+    let tile2 = TileType::ToLocal(3);
+    assert_ne!(tile1, tile2);
+
+    let tile3 = TileType::ToLocal(3);
+    assert_eq!(tile2, tile3);
+}