Source code for canvascli.utils

# -*- coding: utf-8 -*-
"""Test cases."""

# Standard library imports
import argparse


def check_color(color):
    """Check color and return cleansed value."""
    color = str(color)  # Force a string character
    color_len = len(color)

    if color_len == 0:
        raise ValueError("Color cannot be empty!")
    elif color_len != 1:
        color = color[0]  # Guarantee length of character equal to 1
        raise ValueError("Color has to be a single character!")

    return color


def positive_int(value):
    """Check positive integer value types."""
    int_value = int(value)
    if int_value <= 0:
        raise argparse.ArgumentTypeError(
            "invalid positive integer value: '{}'".format(value)
        )
    return int_value