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1# -*- coding: utf-8 -*-
2import codecs
3import io
4import logging
5import os
6import re
7import shutil
8import sys
9import tempfile
10import unittest
11
12from lib2to3 import main
13
14
15TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
16PY2_TEST_MODULE = os.path.join(TEST_DATA_DIR, "py2_test_grammar.py")
17
18
19class TestMain(unittest.TestCase):
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
138if __name__ == '__main__':
139    unittest.main()
140