Added tests for greedy algorithm

Author: OmkarPathak

tests/test_greedy_algorithm.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+import unittest
+
+from pygorithm.greedy_algorithm import (
+    fractional_knapsack,
+    )
+
+
+class TestFractionalKnapsack(unittest.TestCase):
+    def test_fractional_knapsack(self):
+        value = [60, 100, 120]
+        weight = [10, 20, 30]
+        W = 50
+        self.assertEqual(fractional_knapsack.knapsack(W, value, weight), 240)
+
+if __name__ == '__main__':
+    unittest.main()