bisect_kit/cli_test.py

# -*- coding: utf-8 -*-
# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Test cli module."""

from __future__ import print_function
import argparse
import unittest

from bisect_kit import cli


class TestCli(unittest.TestCase):
  """Test functions in cli module."""

  def test_argtype_int(self):
    self.assertEqual(cli.argtype_int('123456'), '123456')
    self.assertEqual(cli.argtype_int('-123456'), '-123456')
    with self.assertRaises(cli.ArgTypeError):
      cli.argtype_int('foobar')

  def test_argtype_notempty(self):
    self.assertEqual(cli.argtype_notempty('123456'), '123456')
    with self.assertRaises(cli.ArgTypeError):
      cli.argtype_notempty('')

  def test_argtype_re(self):
    argtype = cli.argtype_re(r'^r\d+$', 'r123')
    self.assertEqual(argtype('r123'), 'r123')

    with self.assertRaises(cli.ArgTypeError):
      argtype('hello')

  def test_argtype_multiplexer(self):
    argtype = cli.argtype_multiplexer(cli.argtype_int,
                                      cli.argtype_re('foobar', 'foobar'),
                                      cli.argtype_re(r'^r\d+$', 'r123'))
    self.assertEqual(argtype('123456'), '123456')
    self.assertEqual(argtype('foobar'), 'foobar')
    self.assertEqual(argtype('r123'), 'r123')

    with self.assertRaises(cli.ArgTypeError):
      argtype('hello')

  def test_argtype_multiplier(self):
    argtype = cli.argtype_multiplier(cli.argtype_int)
    self.assertEqual(argtype('123'), ('123', 1))
    self.assertEqual(argtype('123*5'), ('123', 5))

    # Make sure there is multiplier example in the message.
    with self.assertRaisesRegexp(cli.ArgTypeError, r'\d+\*\d+'):
      argtype('hello')

  def test_argtype_path(self):
    self.assertEqual(cli.argtype_dir_path('/'), '/')
    self.assertEqual(cli.argtype_dir_path('/etc/'), '/etc')

    with self.assertRaises(cli.ArgTypeError):
      cli.argtype_dir_path('')
    with self.assertRaises(cli.ArgTypeError):
      cli.argtype_dir_path('/foo/bar/not/exist/path')
    with self.assertRaises(cli.ArgTypeError):
      cli.argtype_dir_path('/etc/passwd')

  def test_check_executable(self):
    self.assertEqual(cli.check_executable('/bin/true'), None)

    self.assertRegexpMatches(cli.check_executable('/'), r'Not a file')
    self.assertRegexpMatches(cli.check_executable('LICENSE'), r'chmod')
    self.assertRegexpMatches(cli.check_executable('what'), r'PATH')
    self.assertRegexpMatches(cli.check_executable('eval-manually.sh'), r'\./')

  def test_lookup_signal_name(self):
    self.assertEqual(cli.lookup_signal_name(15), 'SIGTERM')
    self.assertEqual(cli.lookup_signal_name(99), 'Unknown')

  def test_patching_argparser_exit(self):
    parser = argparse.ArgumentParser()
    cli.patching_argparser_exit(parser)
    parser.add_argument('--value', type=int)
    parser.add_argument('--necessary', required=True)

    # Nothing happened.
    parser.parse_args(['--necessary', 'foo'])

    with self.assertRaises(SystemExit) as e:
      parser.parse_args(['foo'])
    self.assertEqual(e.exception.code, cli.EXIT_CODE_FATAL)

    with self.assertRaises(SystemExit) as e:
      parser.parse_args(['--necessary', 'foo', '--value', 'bar'])
    self.assertEqual(e.exception.code, cli.EXIT_CODE_FATAL)

  def test_fatal_error_handler(self):

    @cli.fatal_error_handler
    def test_func():
      assert 0

    with self.assertRaises(SystemExit) as e:
      test_func()
    self.assertEqual(e.exception.code, cli.EXIT_CODE_FATAL)


if __name__ == '__main__':
  unittest.main()