def test_mkdir_if_needed_raises_oserror_when_mkdir_fails(self, mock_mkdirs):
""" Tests invocation of API mkdir_if_needed raises OSError when makedirs raises OSError"""
# arrange
dir_path = 'blah'
mock_mkdirs.side_effect = OSError(errno.EACCES, 'Directory permission error')
# act, assert
with self.assertRaises(OSError):
Utils.mkdir_if_needed(dir_path)
def test_mkdir_if_needed_when_dir_does_not_exist(self, mock_mkdirs):
""" Test a valid invocation of API mkdir_if_needed when dir to be made does not exist """
# arrange
dir_path = 'blah'
# act
Utils.mkdir_if_needed(dir_path)
# assert
mock_mkdirs.assert_called_with(dir_path)
def test_mkdir_if_needed_when_dir_exists(self, mock_mkdirs):
""" Test a valid invocation of API mkdir_if_needed when dir to be made already exists """
# arrange
dir_path = 'blah'
mock_mkdirs.side_effect = OSError(errno.EEXIST, 'Directory exists.')
# act
Utils.mkdir_if_needed(dir_path)
# assert
mock_mkdirs.assert_called_with(dir_path)