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# -*- coding: utf-8 -*-
"""Helpers for testing."""
import codecs
import difflib
import os
import unittest
from sqlparse import compat
import sqlparse.utils
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 = compat.text_type(first)
ssecond = compat.text_type(second)
# Using the built-in .splitlines() method here will cause incorrect
# results when splitting statements that have quoted CR/CR+LF
# characters.
sfirst = sqlparse.utils.split_unquoted_newlines(sfirst)
ssecond = sqlparse.utils.split_unquoted_newlines(ssecond)
diff = difflib.ndiff(sfirst, ssecond)
fp = compat.StringIO()
fp.write(NL)
fp.write(NL.join(diff))
print(fp.getvalue())
raise self.failureException(fp.getvalue())
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