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# -*- coding: utf-8 -*-
"""Helpers for testing."""
import codecs
import difflib
import os
import unittest
from StringIO import StringIO
NL = '\n'
DIR_PATH = os.path.abspath(os.path.dirname(__file__))
PARENT_DIR = os.path.dirname(DIR_PATH)
FILES_DIR = os.path.join(DIR_PATH, 'files')
def load_file(filename, encoding='utf-8'):
"""Opens filename with encoding and return it's contents."""
f = codecs.open(os.path.join(FILES_DIR, filename), 'r', encoding)
data = f.read()
f.close()
return data
class TestCaseBase(unittest.TestCase):
"""Base class for test cases with some additional checks."""
# Adopted from Python's tests.
def ndiffAssertEqual(self, first, second):
"""Like failUnlessEqual except use ndiff for readable output."""
if first != second:
sfirst = unicode(first)
ssecond = unicode(second)
diff = difflib.ndiff(sfirst.splitlines(), ssecond.splitlines())
fp = StringIO()
print >> fp, NL, NL.join(diff)
print fp.getvalue()
raise self.failureException, fp.getvalue()
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