Add knapsack unbounded challenge

recursion_dynamic/knapsack_unbounded/test_knapsack_unbounded.py

@@ -0,0 +1,29 @@
+from nose.tools import assert_equal, assert_raises
+
+
+class TestKnapsack(object):
+
+    def test_knapsack(self):
+        knapsack = Knapsack()
+        assert_raises(TypeError, knapsack.fill_knapsack, None, None)
+        assert_equal(knapsack.fill_knapsack(0, 0), 0)
+        items = []
+        items.append(Item(label='a', value=1, weight=1))
+        items.append(Item(label='b', value=3, weight=2))
+        items.append(Item(label='c', value=7, weight=4))
+        total_weight = 8
+        expected_value = 14
+        results = knapsack.fill_knapsack(items, total_weight)
+        total_weight = 7
+        expected_value = 11
+        results = knapsack.fill_knapsack(items, total_weight)
+        assert_equal(results, expected_value)
+        print('Success: test_knapsack')
+
+def main():
+    test = TestKnapsack()
+    test.test_knapsack()
+
+
+if __name__ == '__main__':
+    main()