def is_close(value_a: float, value_b: float, tolerance: float = 0.000001) -> bool:
    """Tests whether or not value_a and value_b are "close" (i.e. within the `tolerance` after subtracting)

    Args:
        value_a:
            numeric value to test
        value_b:
            numeric value to test
        tolerance:
            the maximum difference (absolute value) allowed between value_a and value_b
    Returns:
          True if values are within specified tolerance
    """
    return abs(value_a - value_b) <= tolerance