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# -*- coding: utf-8 -*-
"""Helpers for testing."""
import difflib
import io
import os
import unittest
from sqlparse.utils import split_unquoted_newlines
from sqlparse.compat import u, StringIO
DIR_PATH = os.path.dirname(__file__)
FILES_DIR = os.path.join(DIR_PATH, 'files')
def load_file(filename, encoding='utf-8'):
"""Opens filename with encoding and return its contents."""
with io.open(os.path.join(FILES_DIR, filename), encoding=encoding) as f:
return f.read()
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:
# Using the built-in .splitlines() method here will cause incorrect
# results when splitting statements that have quoted CR/CR+LF
# characters.
sfirst = split_unquoted_newlines(u(first))
ssecond = split_unquoted_newlines(u(second))
diff = difflib.ndiff(sfirst, ssecond)
fp = StringIO()
fp.write('\n')
fp.write('\n'.join(diff))
raise self.failureException(fp.getvalue())
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