Added delete mid challenge.

linked_lists/delete_mid/test_delete_mid.py

@@ -0,0 +1,34 @@
+from nose.tools import assert_equal
+
+
+class TestDeleteNode(object):
+    
+    def test_delete_node(self):
+        print('Test: Empty list, null node to delete')
+        linked_list = MyLinkedList(None)
+        linked_list.delete_node(None)
+        assert_equal(linked_list.get_all_data(), [])
+
+        print('Test: One node')
+        head = Node(2)
+        linked_list = MyLinkedList(head)
+        linked_list.delete_node(head)
+        assert_equal(linked_list.get_all_data(), [None])
+
+        print('Test: Multiple nodes')
+        linked_list = MyLinkedList(None)        
+        node0 = linked_list.insert_to_front(1)
+        node1 = linked_list.insert_to_front(3)
+        node2 = linked_list.insert_to_front(4)
+        node3 = linked_list.insert_to_front(1)
+        linked_list.delete_node(node2)
+        assert_equal(linked_list.get_all_data(), [1, 3, 1])
+        
+        print('Success: test_delete_node')
+
+def main():
+    test = TestDeleteNode()
+    test.test_delete_node()
+    
+if __name__ == '__main__':
+    main()