From ae0d9d16aa94b9252612af25c674dab88f3ee4ec Mon Sep 17 00:00:00 2001
From: Kaivalya Rawal <kaivalyaraw@gmail.com>
Date: Wed, 8 Mar 2017 02:57:13 +0530
Subject: [PATCH 1/3] adding tests for agent directions

---
 tests/test_agents.py | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 tests/test_agents.py

diff --git a/tests/test_agents.py b/tests/test_agents.py
new file mode 100644
index 000000000..73bac37ec
--- /dev/null
+++ b/tests/test_agents.py
@@ -0,0 +1,40 @@
+from agents import Direction
+
+def test_move_forward():
+    d = Direction("up")
+    l1 = d.move_forward((0,0))
+    assert l1 == (0,-1)
+    d = Direction(Direction.R)
+    l1 = d.move_forward((0,0))
+    assert l1 == (1,0)
+    d = Direction(Direction.D)
+    l1 = d.move_forward((0,0))
+    assert l1 == (0,1)
+    d = Direction("left")
+    l1 = d.move_forward((0,0))
+    assert l1 == (-1,0)
+    l2 = d.move_forward((1,0))
+    assert l2 == (0,0)
+
+def test_add():
+    d = Direction(Direction.U)
+    l1 = d + "right"
+    l2 = d + "left"
+    assert l1.direction == Direction.R
+    assert l2.direction == Direction.L
+    d = Direction("right")
+    l1 = d.__add__(Direction.L)
+    l2 = d.__add__(Direction.R)
+    assert l1.direction == "up"
+    assert l2.direction == "down"
+    d = Direction("down")
+    l1 = d.__add__("right")
+    l2 = d.__add__("left")
+    assert l1.direction == Direction.L
+    assert l2.direction == Direction.R
+    d = Direction(Direction.L)
+    l1 = d + Direction.R
+    l2 = d + Direction.L
+    assert l1.direction == Direction.U
+    #assert l2.direction == Direction.D currently gives an error - need to fix bug in agents.py
+

From f8b257c23730f2fe158a8be8d4e214720ce87510 Mon Sep 17 00:00:00 2001
From: Kaivalya Rawal <kaivalyaraw@gmail.com>
Date: Wed, 8 Mar 2017 03:01:18 +0530
Subject: [PATCH 2/3] added test that fails due to bug in agents.py

---
 tests/test_agents.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/test_agents.py b/tests/test_agents.py
index 73bac37ec..89ee3fcf3 100644
--- a/tests/test_agents.py
+++ b/tests/test_agents.py
@@ -36,5 +36,5 @@ def test_add():
     l1 = d + Direction.R
     l2 = d + Direction.L
     assert l1.direction == Direction.U
-    #assert l2.direction == Direction.D currently gives an error - need to fix bug in agents.py
+    assert l2.direction == Direction.D #fixed
 

From adfae75f91e70f1c9159b6064a9ca5902ad9455c Mon Sep 17 00:00:00 2001
From: Kaivalya Rawal <kaivalyaraw@gmail.com>
Date: Wed, 8 Mar 2017 03:01:58 +0530
Subject: [PATCH 3/3] fixed direction error: L + L = D

---
 agents.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/agents.py b/agents.py
index a5bf376ca..adb3f9bbc 100644
--- a/agents.py
+++ b/agents.py
@@ -345,7 +345,7 @@ def __add__(self, heading):
         elif self.direction == self.L:
             return{
                 self.R: Direction(self.U),
-                self.L: Direction(self.L),
+                self.L: Direction(self.D),
             }.get(heading, None)
         elif self.direction == self.U:
             return{