collatz-conjecture: sync with problem-specifications

exercises/collatz-conjecture/collatz_conjecture.py

@@ -1,2 +1,2 @@
-def collatz_steps(number):
+def steps(number):
     pass

exercises/collatz-conjecture/collatz_conjecture_test.py

@@ -1,31 +1,31 @@
 import unittest
 
-from collatz_conjecture import collatz_steps
+from collatz_conjecture import steps
 
 
 # Tests adapted from `problem-specifications//canonical-data.json` @ v1.2.1
 
-class CollatzConjectureTest(unittest.TestCase):
 
+class CollatzConjectureTest(unittest.TestCase):
     def test_zero_steps_for_one(self):
-        self.assertEqual(collatz_steps(1), 0)
+        self.assertEqual(steps(1), 0)
 
     def test_divide_if_even(self):
-        self.assertEqual(collatz_steps(16), 4)
+        self.assertEqual(steps(16), 4)
 
     def test_even_and_odd_steps(self):
-        self.assertEqual(collatz_steps(12), 9)
+        self.assertEqual(steps(12), 9)
 
     def test_large_number_of_even_and_odd_steps(self):
-        self.assertEqual(collatz_steps(1000000), 152)
+        self.assertEqual(steps(1000000), 152)
 
-    def test_zero_is_invalid_input(self):
+    def test_zero_is_an_error(self):
         with self.assertRaisesWithMessage(ValueError):
-            collatz_steps(0)
+            steps(0)
 
-    def test_negative_number_is_invalid_input(self):
+    def test_negative_value_is_an_error(self):
         with self.assertRaisesWithMessage(ValueError):
-            collatz_steps(-15)
+            steps(-15)
 
     # Utility functions
     def setUp(self):
@@ -38,5 +38,5 @@ def assertRaisesWithMessage(self, exception):
         return self.assertRaisesRegex(exception, r".+")
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()

exercises/collatz-conjecture/example.py

@@ -1,4 +1,4 @@
-def collatz_steps(n):
+def steps(n):
     if n <= 0:
         raise ValueError("input should be positive")