def generate_test_function(name: str) -> callable:
    """
    Generate a test function with given name.

    Args:
        name (str): Name of the test function to be generated.

    Returns:
        callable: The generated test function.
    """
    def _test_function():
        # Simulate some test logic
        return f"Test {name} executed successfully."
    
    return _test_function

# Example usage:
func = generate_test_function('example')
print(func())