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# -*- coding: utf-8 -*-
import sys
import codecs
import logging
import io
import unittest
from lib2to3 import main
class TestMain(unittest.TestCase):
def tearDown(self):
# Clean up logging configuration down by main.
del logging.root.handlers[:]
def run_2to3_capture(self, args, in_capture, out_capture, err_capture):
save_stdin = sys.stdin
save_stdout = sys.stdout
save_stderr = sys.stderr
sys.stdin = in_capture
sys.stdout = out_capture
sys.stderr = err_capture
try:
return main.main("lib2to3.fixes", args)
finally:
sys.stdin = save_stdin
sys.stdout = save_stdout
sys.stderr = save_stderr
def test_unencodable_diff(self):
input_stream = io.StringIO("print 'nothing'\nprint u'über'\n")
out = io.BytesIO()
out_enc = codecs.getwriter("ascii")(out)
err = io.StringIO()
ret = self.run_2to3_capture(["-"], input_stream, out_enc, err)
self.assertEqual(ret, 0)
output = out.getvalue().decode("ascii")
self.assertTrue("-print 'nothing'" in output)
self.assertTrue("WARNING: couldn't encode <stdin>'s diff for "
"your terminal" in err.getvalue())
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