challenge 7 in python

challenge_7/python/sarcodian/src/challenge_7.py

@@ -0,0 +1,12 @@
+def missing_int(L):
+
+    sum_n = 0
+    sum_n_less_1 = 0
+
+    for i in range(len(L)+1):
+        sum_n += i
+
+    for i in L:
+        sum_n_less_1 += i
+
+    return sum_n - sum_n_less_1

challenge_7/python/sarcodian/src/challenge_7_tests.py

@@ -0,0 +1,23 @@
+# we start by importing the unittest module
+import unittest
+
+# Next lets import our function that we intend to do testing on
+#
+# **We could also import all functions by using * or just import the module
+# itself but for now lets just import the function
+from challenge_7 import missing_int
+
+# lets define our suite of tests as a class and lets inherit from unittest.TestCase
+class TestBinaryMethods(unittest.TestCase):
+
+    def test_missingInt(self):
+        """ Tests from the READ.me """
+
+        self.assertEqual(missing_int([1,3,4,0]), 2)
+        self.assertEqual(missing_int([1,2,3]), 0)
+        self.assertEqual(missing_int([0,1,2,4]), 3)
+
+# if the python file is ran by itself run unittest
+# This allows us to import the members of the file without running main if we need to
+if __name__ == '__main__':
+    unittest.main()