added tests

test-projects/python-basic/src/test_package/utils.py

@@ -0,0 +1,24 @@
+"""Utility functions for the test package."""
+
+from typing import Union
+
+
+def format_number(number: Union[int, float], precision: int = 2) -> str:
+    """Format a number with specified precision."""
+    if isinstance(number, int):
+        return str(number)
+    return f"{number:.{precision}f}"
+
+
+def is_even(number: int) -> bool:
+    """Check if a number is even."""
+    return number % 2 == 0
+
+
+def factorial(n: int) -> int:
+    """Calculate factorial of a number."""
+    if n < 0:
+        raise ValueError("Factorial is not defined for negative numbers")
+    if n == 0 or n == 1:
+        return 1
+    return n * factorial(n - 1)