From 1078e1947e4e9c4779e230d07931a997cb565691 Mon Sep 17 00:00:00 2001
From: fiatcode <fiatcode@posteo.com>
Date: Tue, 24 Feb 2026 10:49:06 +0700
Subject: [PATCH] RED: test plateau boundaries with wrapping

---
 test/mars_rover_test.dart | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/test/mars_rover_test.dart b/test/mars_rover_test.dart
index 1c23070..90f8f4b 100644
--- a/test/mars_rover_test.dart
+++ b/test/mars_rover_test.dart
@@ -128,5 +128,37 @@ void main() {
         expect(rover.direction, equals('N'));
       });
     });
+
+    group('Plateau Boundaries:', () {
+      test('wraps around when moving North past boundary', () {
+        final rover = Rover(x: 0, y: 5, direction: 'N', plateauWidth: 5, plateauHeight: 5);
+        rover.moveForward();
+        expect(rover.y, equals(0));
+      });
+
+      test('wraps around when moving East past boundary', () {
+        final rover = Rover(x: 5, y: 0, direction: 'E', plateauWidth: 5, plateauHeight: 5);
+        rover.moveForward();
+        expect(rover.x, equals(0));
+      });
+
+      test('wraps around when moving South past boundary', () {
+        final rover = Rover(x: 0, y: 0, direction: 'S', plateauWidth: 5, plateauHeight: 5);
+        rover.moveForward();
+        expect(rover.y, equals(5));
+      });
+
+      test('wraps around when moving West past boundary', () {
+        final rover = Rover(x: 0, y: 0, direction: 'W', plateauWidth: 5, plateauHeight: 5);
+        rover.moveForward();
+        expect(rover.x, equals(5));
+      });
+
+      test('example with wrapping', () {
+        final rover = Rover(x: 5, y: 5, direction: 'N', plateauWidth: 5, plateauHeight: 5);
+        rover.execute('MMM');
+        expect(rover.y, equals(2));
+      });
+    });
   });
 }