learning/katas/python/test_helper.py

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import sys
import subprocess


def get_file_text(path):
    """Returns file text by path."""
    file_io = open(path, "r")
    text = file_io.read()
    file_io.close()
    return text


def get_file_output(path=sys.argv[-1], arg_string="", encoding="utf-8", ):
    """
    Returns answer file output.

    :param path: path of file to execute
    :param arg_string: arguments to be passed to the script
    :param encoding: to decode output in python3
    :return: list of strings
    """
    proc = subprocess.Popen([sys.executable, path], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    if arg_string:
        for arg in arg_string.split("\n"):
            proc.stdin.write(bytearray(str(arg) + "\n", encoding))
            proc.stdin.flush()

    return list(map(lambda x: str(x.decode(encoding)), proc.communicate()[0].splitlines()))


def test_is_not_empty() -> bool:
    """Checks that file is not empty."""
    path = sys.argv[-1]
    file_text = get_file_text(path)

    if len(file_text) > 0:
        return True
    else:
        return False