From 692a111f56f0e0edd19376e447b530ff4cb21521 Mon Sep 17 00:00:00 2001
From: Jeremy Thurgood <firxen@gmail.com>
Date: Mon, 12 May 2014 23:29:49 +0200
Subject: [PATCH] Only move if the flags allow.

---
 naja/player.py            |  8 +++---
 naja/tests/test_player.py | 51 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/naja/player.py b/naja/player.py
index fa6e1e9..83c4124 100644
--- a/naja/player.py
+++ b/naja/player.py
@@ -75,19 +75,19 @@ class Player(object):
         # TODO: Something cleaner than this.
         x, y = self.position
         if direction == BITS.NORTH:
-            if y > 0:
+            if y > 0 and self.bits.check_bit(BITS.NORTH):
                 self.position = (x, y - 1)
                 return True
         elif direction == BITS.SOUTH:
-            if y < 4:
+            if y < 4 and self.bits.check_bit(BITS.SOUTH):
                 self.position = (x, y + 1)
                 return True
         elif direction == BITS.EAST:
-            if x < 4:
+            if x < 4 and self.bits.check_bit(BITS.EAST):
                 self.position = (x + 1, y)
                 return True
         elif direction == BITS.WEST:
-            if x > 0:
+            if x > 0 and self.bits.check_bit(BITS.WEST):
                 self.position = (x - 1, y)
                 return True
 
diff --git a/naja/tests/test_player.py b/naja/tests/test_player.py
index c748c72..9939f58 100644
--- a/naja/tests/test_player.py
+++ b/naja/tests/test_player.py
@@ -106,3 +106,54 @@ class TestPlayer(TestCase):
             'bits': 0xaa,
             'position': [1, 2],
         })
+
+    def test_move(self):
+        player = Player(0x0f, (2, 2))
+        self.assertEqual(player.move(BITS.NORTH), True)
+        self.assertEqual(player.position, (2, 1))
+
+        player = Player(0x0f, (2, 2))
+        self.assertEqual(player.move(BITS.SOUTH), True)
+        self.assertEqual(player.position, (2, 3))
+
+        player = Player(0x0f, (2, 2))
+        self.assertEqual(player.move(BITS.WEST), True)
+        self.assertEqual(player.position, (1, 2))
+
+        player = Player(0x0f, (2, 2))
+        self.assertEqual(player.move(BITS.EAST), True)
+        self.assertEqual(player.position, (3, 2))
+
+    def test_move_flags_clear(self):
+        player = Player(0x00, (2, 2))
+        self.assertEqual(player.move(BITS.NORTH), False)
+        self.assertEqual(player.position, (2, 2))
+
+        player = Player(0x00, (2, 2))
+        self.assertEqual(player.move(BITS.SOUTH), False)
+        self.assertEqual(player.position, (2, 2))
+
+        player = Player(0x00, (2, 2))
+        self.assertEqual(player.move(BITS.WEST), False)
+        self.assertEqual(player.position, (2, 2))
+
+        player = Player(0x00, (2, 2))
+        self.assertEqual(player.move(BITS.EAST), False)
+        self.assertEqual(player.position, (2, 2))
+
+    def test_move_flags_edges(self):
+        player = Player(0x0f, (2, 0))
+        self.assertEqual(player.move(BITS.NORTH), False)
+        self.assertEqual(player.position, (2, 0))
+
+        player = Player(0x0f, (2, 4))
+        self.assertEqual(player.move(BITS.SOUTH), False)
+        self.assertEqual(player.position, (2, 4))
+
+        player = Player(0x0f, (0, 2))
+        self.assertEqual(player.move(BITS.WEST), False)
+        self.assertEqual(player.position, (0, 2))
+
+        player = Player(0x0f, (4, 2))
+        self.assertEqual(player.move(BITS.EAST), False)
+        self.assertEqual(player.position, (4, 2))
-- 
2.34.1