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# -*- coding: utf-8 -*-
"""Shared functions and classes for testing."""
from __future__ import unicode_literals
import os
import shutil
import tempfile
import unittest
class BaseTestCase(unittest.TestCase):
"""The base test case."""
_DATA_PATH = os.path.join(os.getcwd(), 'data')
_TEST_DATA_PATH = os.path.join(os.getcwd(), 'test_data')
# Show full diff results, part of TestCase so does not follow our naming
# conventions.
maxDiff = None
def _GetTestFilePath(self, path_segments):
"""Retrieves the path of a test file in the test data directory.
Args:
path_segments (list[str]): path segments inside the test data directory.
Returns:
str: path of the test file.
"""
# Note that we need to pass the individual path segments to os.path.join
# and not a list.
return os.path.join(self._TEST_DATA_PATH, *path_segments)
def _SkipIfPathNotExists(self, path):
"""Skips the test if the path does not exist.
Args:
path (str): path of a test file.
Raises:
SkipTest: if the path path does not exist and the test should be skipped.
"""
if not os.path.exists(path):
filename = os.path.basename(path)
raise unittest.SkipTest('missing test file: {0:s}'.format(filename))
class TempDirectory(object):
"""Class that implements a temporary directory."""
def __init__(self):
"""Initializes a temporary directory."""
super(TempDirectory, self).__init__()
self.name = ''
def __enter__(self):
"""Make this work with the 'with' statement."""
self.name = tempfile.mkdtemp()
return self.name
def __exit__(self, unused_type, unused_value, unused_traceback):
"""Make this work with the 'with' statement."""
shutil.rmtree(self.name, True)
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