python (3.12.0)
1 # -*- coding: utf-8 -*-
2 import codecs
3 import io
4 import logging
5 import os
6 import re
7 import shutil
8 import sys
9 import tempfile
10 import unittest
11
12 from lib2to3 import main
13
14
15 TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
16 PY2_TEST_MODULE = os.path.join(TEST_DATA_DIR, "py2_test_grammar.py")
17
18
19 class ESC[4;38;5;81mTestMain(ESC[4;38;5;149munittestESC[4;38;5;149m.ESC[4;38;5;149mTestCase):
20
21 def setUp(self):
22 self.temp_dir = None # tearDown() will rmtree this directory if set.
23
24 def tearDown(self):
25 # Clean up logging configuration down by main.
26 del logging.root.handlers[:]
27 if self.temp_dir:
28 shutil.rmtree(self.temp_dir)
29
30 def run_2to3_capture(self, args, in_capture, out_capture, err_capture):
31 save_stdin = sys.stdin
32 save_stdout = sys.stdout
33 save_stderr = sys.stderr
34 sys.stdin = in_capture
35 sys.stdout = out_capture
36 sys.stderr = err_capture
37 try:
38 return main.main("lib2to3.fixes", args)
39 finally:
40 sys.stdin = save_stdin
41 sys.stdout = save_stdout
42 sys.stderr = save_stderr
43
44 def test_unencodable_diff(self):
45 input_stream = io.StringIO("print 'nothing'\nprint u'über'\n")
46 out = io.BytesIO()
47 out_enc = codecs.getwriter("ascii")(out)
48 err = io.StringIO()
49 ret = self.run_2to3_capture(["-"], input_stream, out_enc, err)
50 self.assertEqual(ret, 0)
51 output = out.getvalue().decode("ascii")
52 self.assertIn("-print 'nothing'", output)
53 self.assertIn("WARNING: couldn't encode <stdin>'s diff for "
54 "your terminal", err.getvalue())
55
56 def setup_test_source_trees(self):
57 """Setup a test source tree and output destination tree."""
58 self.temp_dir = tempfile.mkdtemp() # tearDown() cleans this up.
59 self.py2_src_dir = os.path.join(self.temp_dir, "python2_project")
60 self.py3_dest_dir = os.path.join(self.temp_dir, "python3_project")
61 os.mkdir(self.py2_src_dir)
62 os.mkdir(self.py3_dest_dir)
63 # Turn it into a package with a few files.
64 self.setup_files = []
65 open(os.path.join(self.py2_src_dir, "__init__.py"), "w").close()
66 self.setup_files.append("__init__.py")
67 shutil.copy(PY2_TEST_MODULE, self.py2_src_dir)
68 self.setup_files.append(os.path.basename(PY2_TEST_MODULE))
69 self.trivial_py2_file = os.path.join(self.py2_src_dir, "trivial.py")
70 self.init_py2_file = os.path.join(self.py2_src_dir, "__init__.py")
71 with open(self.trivial_py2_file, "w") as trivial:
72 trivial.write("print 'I need a simple conversion.'")
73 self.setup_files.append("trivial.py")
74
75 def test_filename_changing_on_output_single_dir(self):
76 """2to3 a single directory with a new output dir and suffix."""
77 self.setup_test_source_trees()
78 out = io.StringIO()
79 err = io.StringIO()
80 suffix = "TEST"
81 ret = self.run_2to3_capture(
82 ["-n", "--add-suffix", suffix, "--write-unchanged-files",
83 "--no-diffs", "--output-dir",
84 self.py3_dest_dir, self.py2_src_dir],
85 io.StringIO(""), out, err)
86 self.assertEqual(ret, 0)
87 stderr = err.getvalue()
88 self.assertIn(" implies -w.", stderr)
89 self.assertIn(
90 "Output in %r will mirror the input directory %r layout" % (
91 self.py3_dest_dir, self.py2_src_dir), stderr)
92 self.assertEqual(set(name+suffix for name in self.setup_files),
93 set(os.listdir(self.py3_dest_dir)))
94 for name in self.setup_files:
95 self.assertIn("Writing converted %s to %s" % (
96 os.path.join(self.py2_src_dir, name),
97 os.path.join(self.py3_dest_dir, name+suffix)), stderr)
98 sep = re.escape(os.sep)
99 self.assertRegex(
100 stderr, r"No changes to .*/__init__\.py".replace("/", sep))
101 self.assertNotRegex(
102 stderr, r"No changes to .*/trivial\.py".replace("/", sep))
103
104 def test_filename_changing_on_output_two_files(self):
105 """2to3 two files in one directory with a new output dir."""
106 self.setup_test_source_trees()
107 err = io.StringIO()
108 py2_files = [self.trivial_py2_file, self.init_py2_file]
109 expected_files = set(os.path.basename(name) for name in py2_files)
110 ret = self.run_2to3_capture(
111 ["-n", "-w", "--write-unchanged-files",
112 "--no-diffs", "--output-dir", self.py3_dest_dir] + py2_files,
113 io.StringIO(""), io.StringIO(), err)
114 self.assertEqual(ret, 0)
115 stderr = err.getvalue()
116 self.assertIn(
117 "Output in %r will mirror the input directory %r layout" % (
118 self.py3_dest_dir, self.py2_src_dir), stderr)
119 self.assertEqual(expected_files, set(os.listdir(self.py3_dest_dir)))
120
121 def test_filename_changing_on_output_single_file(self):
122 """2to3 a single file with a new output dir."""
123 self.setup_test_source_trees()
124 err = io.StringIO()
125 ret = self.run_2to3_capture(
126 ["-n", "-w", "--no-diffs", "--output-dir", self.py3_dest_dir,
127 self.trivial_py2_file],
128 io.StringIO(""), io.StringIO(), err)
129 self.assertEqual(ret, 0)
130 stderr = err.getvalue()
131 self.assertIn(
132 "Output in %r will mirror the input directory %r layout" % (
133 self.py3_dest_dir, self.py2_src_dir), stderr)
134 self.assertEqual(set([os.path.basename(self.trivial_py2_file)]),
135 set(os.listdir(self.py3_dest_dir)))
136
137
138 if __name__ == '__main__':
139 unittest.main()
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