implemented adapter design pattern.

tests/structural_tests/test_adapter.py

@@ -0,0 +1,82 @@
+from unittest import TestCase
+from pypatterns.structural.adapter import Adapter
+
+
+class AdapterTestCase(TestCase):
+    """
+    Unit testing class for the Adapter class.
+    """
+    def setUp(self):
+        """
+        Initialize testing data.
+        """
+        class Dog(object):
+            def __init__(self):
+                self.name = "Dog"
+
+            def bark(self):
+                return "woof!"
+
+        class Cat(object):
+            def __init__(self):
+                self.name = "Cat"
+
+            def meow(self):
+                return "meow!"
+
+        self.cat = Cat()
+        self.dog = Dog()
+
+    def test_init(self):
+        """
+        Test the init method.
+
+        @raise AssertionError: If the test fails.
+        """
+        cat_adapter = Adapter(self.cat, make_noise=self.cat.meow, foo=self.cat.name)
+        dog_adapter = Adapter(self.dog, make_noise=self.dog.bark, foo=self.dog.name)
+
+        self.assertIn('make_noise', cat_adapter.__dict__)
+        self.assertIn('make_noise', dog_adapter.__dict__)
+
+        self.assertNotIn('foo', cat_adapter.__dict__)
+        self.assertNotIn('foo', dog_adapter.__dict__)
+
+        self.assertEquals(cat_adapter.make_noise, self.cat.meow)
+        self.assertEquals(dog_adapter.make_noise, self.dog.bark)
+
+    def test_getattr(self):
+        """
+        Test the __getattr__ method.
+
+        @raise AssertionError: If the test fails.
+        """
+        cat_adapter = Adapter(self.cat, make_noise=self.cat.meow)
+        dog_adapter = Adapter(self.dog, make_noise=self.dog.bark)
+
+        self.assertEquals('Cat', cat_adapter.name)
+        self.assertEquals('Dog', dog_adapter.name)
+
+    def test_original_dict(self):
+        """
+        Test the original_dict method.
+
+        @raise AssertionError: If the test fails.
+        """
+        cat_adapter = Adapter(self.cat, make_noise=self.cat.meow)
+        dog_adapter = Adapter(self.dog, make_noise=self.dog.bark)
+
+        self.assertEquals(self.cat.__dict__, cat_adapter.original_dict())
+        self.assertEquals(self.dog.__dict__, dog_adapter.original_dict())
+
+    def test_adapted_method(self):
+        """
+        Test and adapted method.
+
+        @raise AssertionError: If the test fails.
+        """
+        cat_adapter = Adapter(self.cat, make_noise=self.cat.meow)
+        dog_adapter = Adapter(self.dog, make_noise=self.dog.bark)
+
+        self.assertEquals('meow!', cat_adapter.make_noise())
+        self.assertEquals('woof!', dog_adapter.make_noise())