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#!/usr/bin/env python

# coding: utf-8

"""

This module tests that the scripts are all callable.

"""

from __future__ import absolute_import

import subprocess

import unittest

import sys

import errno

from abc import ABCMeta, abstractmethod

from .config import *

class CanScriptTest(unittest.TestCase):

@classmethod

def setUpClass(cls):

# clean up the argument list so the call to the main() functions

# in test_does_not_crash() succeeds

sys.argv = sys.argv[:1]

#: this is overridden by the subclasses

__test__ = False

__metaclass__ = ABCMeta

def test_do_commands_exist(self):

"""This test calls each scripts once and verifies that the help

can be read without any other errors, like the script not being

found.

"""

for command in self._commands():

try:

subprocess.check_output(command.split(), stderr=subprocess.STDOUT)

except subprocess.CalledProcessError as e:

return_code = e.returncode

output = e.output

else:

return_code = 0

output = "-- NO OUTPUT --"

allowed = [0, errno.EINVAL]

self.assertIn(return_code, allowed,

'Calling "{}" failed (exit code was {} and not SUCCESS/0 or EINVAL/22):\n{}'

.format(command, return_code, output))

def test_does_not_crash(self):

# test import

module = self._import()

# test main method

with self.assertRaises(SystemExit) as cm:

module.main()

self.assertEqual(cm.exception.code, errno.EINVAL,

'Calling main failed:\n{}'.format(command, e.output))

@abstractmethod

def _commands(self):

"""Returns an Iterable of commands that should "succeed", meaning they exit

normally (exit code 0) or with the exit code for invalid arguments: EINVAL/22.

"""

pass

@abstractmethod

def _import(self):

"""Returns the modue of the script that has a main() function.

"""

pass

class TestLoggerScript(CanScriptTest):

__test__ = True

def _commands(self):

commands = [

"python -m can.logger --help",

"python scripts/can_logger.py --help"

]

if IS_UNIX:

commands += ["can_logger.py --help"]

return commands

def _import(self):

import can.logger as module

return module

class TestPlayerScript(CanScriptTest):

__test__ = True

def _commands(self):

commands = [

"python -m can.player --help",

"python scripts/can_player.py --help"

]

if IS_UNIX:

commands += ["can_player.py --help"]

return commands

def _import(self):

import can.player as module

return module

# TODO add #390

if __name__ == '__main__':

unittest.main()