six

main.py

@@ -4,14 +4,18 @@ def divide_by_one(num): # Is whole number
 def divide_by_two(num): # Take last digit, divide by two only on that
     return _get_last_digit(num) % 2 == 0
 
-def divide_by_three(num): # Sum each digit in number, then check divisibility of that number
+def divide_by_three(num): # Sum each digit in number, then checking that sum is divisible by three
     return _sum_digits(num) % 3 == 0
 
 def divide_by_five(num): # If last digit is a zero or a five return true
     last_digit = _get_last_digit(num)
     return last_digit == 0 or last_digit == 5
 
-def divide_by_nine(num): # Sum each digit in number, then check divisibility of that number
+def divide_by_six(num): # Same rules as dividing by three, and ensure original number is even
+    num_sum = _sum_digits(num)
+    return num_sum % 3 == 0 and divide_by_two(num)
+
+def divide_by_nine(num): # Same rules as dividing by three, but checking that sum is divisible by nine
     return _sum_digits(num) % 9 == 0
 
 def _get_last_digit(num):

tests/six_test.py

@@ -0,0 +1,18 @@
+from main import divide_by_six
+import unittest
+
+class TestDivideBySix(unittest.TestCase):
+    def test_by_1(self):
+        self.assertFalse(divide_by_six(1))
+    def test_by_2(self):
+        self.assertFalse(divide_by_six(2))
+    def test_by_3(self):
+        self.assertFalse(divide_by_six(3))
+    def test_by_6(self):
+        self.assertTrue(divide_by_six(6))
+    def test_by_10(self):
+        self.assertFalse(divide_by_six(10))
+    def test_by_12(self):
+        self.assertTrue(divide_by_six(12))
+    def test_by_362880(self):
+        self.assertTrue(divide_by_six(362880))