PCC45 GeoffRiley

Author: GeoffRiley

45/GeoffRiley/fizzbuzz.py

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+from numbers import Number
+from typing import Union
+
+
+def fizzbuzz(val: Number) -> Union[str, Number]:
+    if not isinstance(val, Number) or val % 1 != 0:
+        raise ValueError('Only whole integer values accepted')
+    if val % 15 == 0:
+        return "FizzBuzz"
+    if val % 5 == 0:
+        return "Buzz"
+    if val % 3 == 0:
+        return "Fizz"
+    return val
+
+    # Playing FizzBuzz
+    #   when passed the value 3
+    #     ✓ it says "Fizz"
+    #   when passed a multiple of 3
+    #     ✓ it says "Fizz"
+    #   when passed the value 5
+    #     ✓ it says "Buzz"
+    #   when passed a multiple of 5
+    #     ✓ it says "Buzz"
+    #   when passed a multiple of 3 and 5
+    #     ✓ it says "FizzBuzz"
+    #   when passed a value divisible by neither 3 nor 5
+    #     ✓ it says the value back unchanged
+    #   when passed a none whole integer value
+    #     ✓ it screams and raises a ValueError
+    #   when pass a none numeric value
+    #     ✓ it screams and raises a ValueError

45/GeoffRiley/fizzbuzz_spec.py

@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+
+from expects import expect, equal, raise_error
+from mamba import description, context, it
+
+from fizzbuzz import fizzbuzz
+
+with description('Playing FizzBuzz') as self:
+    with context('when passed the value 3'):
+        with it('says "Fizz"'):
+            expect(fizzbuzz(3)).to(equal('Fizz'))
+
+    with context('when passed a multiple of 3'):
+        with it('says "Fizz"'):
+            expect(fizzbuzz(9)).to(equal('Fizz'))
+
+    with context('when passed the value 5'):
+        with it('says "Buzz"'):
+            expect(fizzbuzz(5)).to(equal('Buzz'))
+
+    with context('when passed a multiple of 5'):
+        with it('says "Buzz"'):
+            expect(fizzbuzz(20)).to(equal('Buzz'))
+
+    with context('when passed a multiple of 3 and 5'):
+        with it('says "FizzBuzz"'):
+            expect(fizzbuzz(15)).to(equal('FizzBuzz'))
+
+    with context('when passed a value divisible by neither 3 nor 5'):
+        with it('says the value back unchanged'):
+            expect(fizzbuzz(1)).to(equal(1))
+            expect(fizzbuzz(2)).to(equal(2))
+
+    with context('when passed a none whole integer value'):
+        with it('screams and raises a ValueError'):
+            # Use lambda to overcome deficiency in expects library
+            expect(lambda: fizzbuzz(3.14)).to(raise_error(ValueError))
+
+    with context('when pass a none numeric value'):
+        with it('screams and raises a ValueError'):
+            # Use lambda to overcome deficiency in expects library
+            expect(lambda: fizzbuzz('fred')).to(raise_error(ValueError))