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import unittest
import encodings
import encodings.aliases
from modulegraph import util
import sys
try:
from io import BytesIO
except ImportError:
from cStringIO import StringIO as BytesIO
class TestUtil (unittest.TestCase):
def test_imp_find_module(self):
fn = util.imp_find_module('encodings.aliases')[1]
self.assertTrue(encodings.aliases.__file__.startswith(fn))
def test_imp_walk(self):
imps = list(util.imp_walk('encodings.aliases'))
self.assertEqual(len(imps), 2)
self.assertEqual(imps[0][0], 'encodings')
self.assertTrue(encodings.__file__.startswith(imps[0][1][1]))
self.assertEqual(imps[1][0], 'aliases')
self.assertTrue(encodings.aliases.__file__.startswith(imps[1][1][1]))
# Close all files, avoid warning by unittest
for i in imps:
if i[1][0] is not None:
i[1][0].close()
def test_guess_encoding(self):
fp = BytesIO(b"# coding: utf-8")
self.assertEqual(util.guess_encoding(fp), "utf-8")
fp = BytesIO(b"\n# coding: utf-8")
self.assertEqual(util.guess_encoding(fp), "utf-8")
fp = BytesIO(b"# coding: latin-1")
self.assertEqual(util.guess_encoding(fp), "latin-1")
fp = BytesIO(b"\n# coding: latin-1")
self.assertEqual(util.guess_encoding(fp), "latin-1")
fp = BytesIO(b"#!/usr/bin/env/python\n# vim: set fileencoding=latin-1 :")
self.assertEqual(util.guess_encoding(fp), "latin-1")
fp = BytesIO(b"\n\n\n# coding: latin-1")
if sys.version_info[0] == 2:
self.assertEqual(util.guess_encoding(fp), "ascii")
else:
self.assertEqual(util.guess_encoding(fp), "utf-8")
del fp
if __name__ == "__main__":
unittest.main()
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