1# -*- coding: utf-8 -*-
2import sys
3import codecs
4import logging
5import os
6import re
7import shutil
8import StringIO
9import sys
10import tempfile
11import unittest
12
13from lib2to3 import main
14
15
16TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
17PY2_TEST_MODULE = os.path.join(TEST_DATA_DIR, "py2_test_grammar.py")
18
19
20class TestMain(unittest.TestCase):
21
22    if not hasattr(unittest.TestCase, 'assertNotRegex'):
23        # This method was only introduced in 3.2.
24        def assertNotRegex(self, text, regexp, msg=None):
25            import re
26            if not hasattr(regexp, 'search'):
27                regexp = re.compile(regexp)
28            if regexp.search(text):
29                self.fail("regexp %s MATCHED text %r" % (regexp.pattern, text))
30
31    def setUp(self):
32        self.temp_dir = None  # tearDown() will rmtree this directory if set.
33
34    def tearDown(self):
35        # Clean up logging configuration down by main.
36        del logging.root.handlers[:]
37        if self.temp_dir:
38            shutil.rmtree(self.temp_dir)
39
40    def run_2to3_capture(self, args, in_capture, out_capture, err_capture):
41        save_stdin = sys.stdin
42        save_stdout = sys.stdout
43        save_stderr = sys.stderr
44        sys.stdin = in_capture
45        sys.stdout = out_capture
46        sys.stderr = err_capture
47        try:
48            return main.main("lib2to3.fixes", args)
49        finally:
50            sys.stdin = save_stdin
51            sys.stdout = save_stdout
52            sys.stderr = save_stderr
53
54    def test_unencodable_diff(self):
55        input_stream = StringIO.StringIO(u"print 'nothing'\nprint u'über'\n")
56        out = StringIO.StringIO()
57        out_enc = codecs.getwriter("ascii")(out)
58        err = StringIO.StringIO()
59        ret = self.run_2to3_capture(["-"], input_stream, out_enc, err)
60        self.assertEqual(ret, 0)
61        output = out.getvalue()
62        self.assertTrue("-print 'nothing'" in output)
63        self.assertTrue("WARNING: couldn't encode <stdin>'s diff for "
64                        "your terminal" in err.getvalue())
65
66    def setup_test_source_trees(self):
67        """Setup a test source tree and output destination tree."""
68        self.temp_dir = tempfile.mkdtemp()  # tearDown() cleans this up.
69        self.py2_src_dir = os.path.join(self.temp_dir, "python2_project")
70        self.py3_dest_dir = os.path.join(self.temp_dir, "python3_project")
71        os.mkdir(self.py2_src_dir)
72        os.mkdir(self.py3_dest_dir)
73        # Turn it into a package with a few files.
74        self.setup_files = []
75        open(os.path.join(self.py2_src_dir, "__init__.py"), "w").close()
76        self.setup_files.append("__init__.py")
77        shutil.copy(PY2_TEST_MODULE, self.py2_src_dir)
78        self.setup_files.append(os.path.basename(PY2_TEST_MODULE))
79        self.trivial_py2_file = os.path.join(self.py2_src_dir, "trivial.py")
80        self.init_py2_file = os.path.join(self.py2_src_dir, "__init__.py")
81        with open(self.trivial_py2_file, "w") as trivial:
82            trivial.write("print 'I need a simple conversion.'")
83        self.setup_files.append("trivial.py")
84
85    def test_filename_changing_on_output_single_dir(self):
86        """2to3 a single directory with a new output dir and suffix."""
87        self.setup_test_source_trees()
88        out = StringIO.StringIO()
89        err = StringIO.StringIO()
90        suffix = "TEST"
91        ret = self.run_2to3_capture(
92                ["-n", "--add-suffix", suffix, "--write-unchanged-files",
93                 "--no-diffs", "--output-dir",
94                 self.py3_dest_dir, self.py2_src_dir],
95                StringIO.StringIO(""), out, err)
96        self.assertEqual(ret, 0)
97        stderr = err.getvalue()
98        self.assertIn(" implies -w.", stderr)
99        self.assertIn(
100                "Output in %r will mirror the input directory %r layout" % (
101                        self.py3_dest_dir, self.py2_src_dir), stderr)
102        self.assertEqual(set(name+suffix for name in self.setup_files),
103                         set(os.listdir(self.py3_dest_dir)))
104        for name in self.setup_files:
105            self.assertIn("Writing converted %s to %s" % (
106                    os.path.join(self.py2_src_dir, name),
107                    os.path.join(self.py3_dest_dir, name+suffix)), stderr)
108        sep = re.escape(os.sep)
109        self.assertRegexpMatches(
110                stderr, r"No changes to .*/__init__\.py".replace("/", sep))
111        self.assertNotRegex(
112                stderr, r"No changes to .*/trivial\.py".replace("/", sep))
113
114    def test_filename_changing_on_output_two_files(self):
115        """2to3 two files in one directory with a new output dir."""
116        self.setup_test_source_trees()
117        err = StringIO.StringIO()
118        py2_files = [self.trivial_py2_file, self.init_py2_file]
119        expected_files = set(os.path.basename(name) for name in py2_files)
120        ret = self.run_2to3_capture(
121                ["-n", "-w", "--write-unchanged-files",
122                 "--no-diffs", "--output-dir", self.py3_dest_dir] + py2_files,
123                StringIO.StringIO(""), StringIO.StringIO(), err)
124        self.assertEqual(ret, 0)
125        stderr = err.getvalue()
126        self.assertIn(
127                "Output in %r will mirror the input directory %r layout" % (
128                        self.py3_dest_dir, self.py2_src_dir), stderr)
129        self.assertEqual(expected_files, set(os.listdir(self.py3_dest_dir)))
130
131    def test_filename_changing_on_output_single_file(self):
132        """2to3 a single file with a new output dir."""
133        self.setup_test_source_trees()
134        err = StringIO.StringIO()
135        ret = self.run_2to3_capture(
136                ["-n", "-w", "--no-diffs", "--output-dir", self.py3_dest_dir,
137                 self.trivial_py2_file],
138                StringIO.StringIO(""), StringIO.StringIO(), err)
139        self.assertEqual(ret, 0)
140        stderr = err.getvalue()
141        self.assertIn(
142                "Output in %r will mirror the input directory %r layout" % (
143                        self.py3_dest_dir, self.py2_src_dir), stderr)
144        self.assertEqual(set([os.path.basename(self.trivial_py2_file)]),
145                         set(os.listdir(self.py3_dest_dir)))
146
147
148if __name__ == '__main__':
149    unittest.main()
150