# -*- coding: utf-8 -*-
import codecs
import io
import logging
import os
import re
import shutil
import sys
import tempfile
import unittest
from lib2to3 import main
TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
PY2_TEST_MODULE = os.path.join(TEST_DATA_DIR, "py2_test_grammar.py")
class TestMain(unittest.TestCase):
def setUp(self):
self.temp_dir = None # tearDown() will rmtree this directory if set.
def tearDown(self):
# Clean up logging configuration down by main.
del logging.root.handlers[:]
if self.temp_dir:
shutil.rmtree(self.temp_dir)
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.assertIn("-print 'nothing'", output)
self.assertIn("WARNING: couldn't encode <stdin>'s diff for "
"your terminal", err.getvalue())
def setup_test_source_trees(self):
"""Setup a test source tree and output destination tree."""
self.temp_dir = tempfile.mkdtemp() # tearDown() cleans this up.
self.py2_src_dir = os.path.join(self.temp_dir, "python2_project")
self.py3_dest_dir = os.path.join(self.temp_dir, "python3_project")
os.mkdir(self.py2_src_dir)
os.mkdir(self.py3_dest_dir)
# Turn it into a package with a few files.
self.setup_files = []
open(os.path.join(self.py2_src_dir, "__init__.py"), "w").close()
self.setup_files.append("__init__.py")
shutil.copy(PY2_TEST_MODULE, self.py2_src_dir)
self.setup_files.append(os.path.basename(PY2_TEST_MODULE))
self.trivial_py2_file = os.path.join(self.py2_src_dir, "trivial.py")
self.init_py2_file = os.path.join(self.py2_src_dir, "__init__.py")
with open(self.trivial_py2_file, "w") as trivial:
trivial.write("print 'I need a simple conversion.'")
self.setup_files.append("trivial.py")
def test_filename_changing_on_output_single_dir(self):
"""2to3 a single directory with a new output dir and suffix."""
self.setup_test_source_trees()
out = io.StringIO()
err = io.StringIO()
suffix = "TEST"
ret = self.run_2to3_capture(
["-n", "--add-suffix", suffix, "--write-unchanged-files",
"--no-diffs", "--output-dir",
self.py3_dest_dir, self.py2_src_dir],
io.StringIO(""), out, err)
self.assertEqual(ret, 0)
stderr = err.getvalue()
self.assertIn(" implies -w.", stderr)
self.assertIn(
"Output in %r will mirror the input directory %r layout" % (
self.py3_dest_dir, self.py2_src_dir), stderr)
self.assertEqual(set(name+suffix for name in self.setup_files),
set(os.listdir(self.py3_dest_dir)))
for name in self.setup_files:
self.assertIn("Writing converted %s to %s" % (
os.path.join(self.py2_src_dir, name),
os.path.join(self.py3_dest_dir, name+suffix)), stderr)
sep = re.escape(os.sep)
self.assertRegex(
stderr, r"No changes to .*/__init__\.py".replace("/", sep))
self.assertNotRegex(
stderr, r"No changes to .*/trivial\.py".replace("/", sep))
def test_filename_changing_on_output_two_files(self):
"""2to3 two files in one directory with a new output dir."""
self.setup_test_source_trees()
err = io.StringIO()
py2_files = [self.trivial_py2_file, self.init_py2_file]
expected_files = set(os.path.basename(name) for name in py2_files)
ret = self.run_2to3_capture(
["-n", "-w", "--write-unchanged-files",
"--no-diffs", "--output-dir", self.py3_dest_dir] + py2_files,
io.StringIO(""), io.StringIO(), err)
self.assertEqual(ret, 0)
stderr = err.getvalue()
self.assertIn(
"Output in %r will mirror the input directory %r layout" % (
self.py3_dest_dir, self.py2_src_dir), stderr)
self.assertEqual(expected_files, set(os.listdir(self.py3_dest_dir)))
def test_filename_changing_on_output_single_file(self):
"""2to3 a single file with a new output dir."""
self.setup_test_source_trees()
err = io.StringIO()
ret = self.run_2to3_capture(
["-n", "-w", "--no-diffs", "--output-dir", self.py3_dest_dir,
self.trivial_py2_file],
io.StringIO(""), io.StringIO(), err)
self.assertEqual(ret, 0)
stderr = err.getvalue()
self.assertIn(
"Output in %r will mirror the input directory %r layout" % (
self.py3_dest_dir, self.py2_src_dir), stderr)
self.assertEqual(set([os.path.basename(self.trivial_py2_file)]),
set(os.listdir(self.py3_dest_dir)))
if __name__ == '__main__':
unittest.main()