Raise an exception if coin_flip_count is invalid

Check both type and value, allowing only int values greater than zero

Author: dagpunk

src/flip_coins.py

@@ -89,7 +89,10 @@ def flip_coins(coin_flip_count: int, chosen_side: str) -> dict:
     }
     """
     # Validate input parameters
-    assert coin_flip_count > 0
+    if not isinstance(coin_flip_count, int):
+        raise TypeError('The number of coins must be an integer')
+    if coin_flip_count < 1:
+        raise ValueError('The number of coins must be an positive, non-zero integer')
 
     # Perform the coin flips
     flip_dataframes = []  # List of dataframes from single flips

src/tests/test_flip_coins_function.py

@@ -30,7 +30,7 @@ def test_multiple_coin_flips(coin_flip_count: int) -> None:
 
 def test_multiple_coin_flip_zero_times() -> None:
     """Test the exception handling of flip_coins when asked to flip 0 coins"""
-    with pytest.raises(AssertionError):
+    with pytest.raises(ValueError):
         src.flip_coins.flip_coins(
             coin_flip_count=0,
             chosen_side="tails"