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