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1# test_getopt.py
2# David Goodger <dgoodger@bigfoot.com> 2000-08-19
3
4from test.support import verbose, run_doctest, EnvironmentVarGuard
5import unittest
6
7import getopt
8
9sentinel = object()
10
11class GetoptTests(unittest.TestCase):
12    def setUp(self):
13        self.env = EnvironmentVarGuard()
14        if "POSIXLY_CORRECT" in self.env:
15            del self.env["POSIXLY_CORRECT"]
16
17    def tearDown(self):
18        self.env.__exit__()
19        del self.env
20
21    def assertError(self, *args, **kwargs):
22        self.assertRaises(getopt.GetoptError, *args, **kwargs)
23
24    def test_short_has_arg(self):
25        self.assertTrue(getopt.short_has_arg('a', 'a:'))
26        self.assertFalse(getopt.short_has_arg('a', 'a'))
27        self.assertError(getopt.short_has_arg, 'a', 'b')
28
29    def test_long_has_args(self):
30        has_arg, option = getopt.long_has_args('abc', ['abc='])
31        self.assertTrue(has_arg)
32        self.assertEqual(option, 'abc')
33
34        has_arg, option = getopt.long_has_args('abc', ['abc'])
35        self.assertFalse(has_arg)
36        self.assertEqual(option, 'abc')
37
38        has_arg, option = getopt.long_has_args('abc', ['abcd'])
39        self.assertFalse(has_arg)
40        self.assertEqual(option, 'abcd')
41
42        self.assertError(getopt.long_has_args, 'abc', ['def'])
43        self.assertError(getopt.long_has_args, 'abc', [])
44        self.assertError(getopt.long_has_args, 'abc', ['abcd','abcde'])
45
46    def test_do_shorts(self):
47        opts, args = getopt.do_shorts([], 'a', 'a', [])
48        self.assertEqual(opts, [('-a', '')])
49        self.assertEqual(args, [])
50
51        opts, args = getopt.do_shorts([], 'a1', 'a:', [])
52        self.assertEqual(opts, [('-a', '1')])
53        self.assertEqual(args, [])
54
55        #opts, args = getopt.do_shorts([], 'a=1', 'a:', [])
56        #self.assertEqual(opts, [('-a', '1')])
57        #self.assertEqual(args, [])
58
59        opts, args = getopt.do_shorts([], 'a', 'a:', ['1'])
60        self.assertEqual(opts, [('-a', '1')])
61        self.assertEqual(args, [])
62
63        opts, args = getopt.do_shorts([], 'a', 'a:', ['1', '2'])
64        self.assertEqual(opts, [('-a', '1')])
65        self.assertEqual(args, ['2'])
66
67        self.assertError(getopt.do_shorts, [], 'a1', 'a', [])
68        self.assertError(getopt.do_shorts, [], 'a', 'a:', [])
69
70    def test_do_longs(self):
71        opts, args = getopt.do_longs([], 'abc', ['abc'], [])
72        self.assertEqual(opts, [('--abc', '')])
73        self.assertEqual(args, [])
74
75        opts, args = getopt.do_longs([], 'abc=1', ['abc='], [])
76        self.assertEqual(opts, [('--abc', '1')])
77        self.assertEqual(args, [])
78
79        opts, args = getopt.do_longs([], 'abc=1', ['abcd='], [])
80        self.assertEqual(opts, [('--abcd', '1')])
81        self.assertEqual(args, [])
82
83        opts, args = getopt.do_longs([], 'abc', ['ab', 'abc', 'abcd'], [])
84        self.assertEqual(opts, [('--abc', '')])
85        self.assertEqual(args, [])
86
87        # Much like the preceding, except with a non-alpha character ("-") in
88        # option name that precedes "="; failed in
89        # http://python.org/sf/126863
90        opts, args = getopt.do_longs([], 'foo=42', ['foo-bar', 'foo=',], [])
91        self.assertEqual(opts, [('--foo', '42')])
92        self.assertEqual(args, [])
93
94        self.assertError(getopt.do_longs, [], 'abc=1', ['abc'], [])
95        self.assertError(getopt.do_longs, [], 'abc', ['abc='], [])
96
97    def test_getopt(self):
98        # note: the empty string between '-a' and '--beta' is significant:
99        # it simulates an empty string option argument ('-a ""') on the
100        # command line.
101        cmdline = ['-a', '1', '-b', '--alpha=2', '--beta', '-a', '3', '-a',
102                   '', '--beta', 'arg1', 'arg2']
103
104        opts, args = getopt.getopt(cmdline, 'a:b', ['alpha=', 'beta'])
105        self.assertEqual(opts, [('-a', '1'), ('-b', ''),
106                                ('--alpha', '2'), ('--beta', ''),
107                                ('-a', '3'), ('-a', ''), ('--beta', '')])
108        # Note ambiguity of ('-b', '') and ('-a', '') above. This must be
109        # accounted for in the code that calls getopt().
110        self.assertEqual(args, ['arg1', 'arg2'])
111
112        self.assertError(getopt.getopt, cmdline, 'a:b', ['alpha', 'beta'])
113
114    def test_gnu_getopt(self):
115        # Test handling of GNU style scanning mode.
116        cmdline = ['-a', 'arg1', '-b', '1', '--alpha', '--beta=2']
117
118        # GNU style
119        opts, args = getopt.gnu_getopt(cmdline, 'ab:', ['alpha', 'beta='])
120        self.assertEqual(args, ['arg1'])
121        self.assertEqual(opts, [('-a', ''), ('-b', '1'),
122                                ('--alpha', ''), ('--beta', '2')])
123
124        # recognize "-" as an argument
125        opts, args = getopt.gnu_getopt(['-a', '-', '-b', '-'], 'ab:', [])
126        self.assertEqual(args, ['-'])
127        self.assertEqual(opts, [('-a', ''), ('-b', '-')])
128
129        # Posix style via +
130        opts, args = getopt.gnu_getopt(cmdline, '+ab:', ['alpha', 'beta='])
131        self.assertEqual(opts, [('-a', '')])
132        self.assertEqual(args, ['arg1', '-b', '1', '--alpha', '--beta=2'])
133
134        # Posix style via POSIXLY_CORRECT
135        self.env["POSIXLY_CORRECT"] = "1"
136        opts, args = getopt.gnu_getopt(cmdline, 'ab:', ['alpha', 'beta='])
137        self.assertEqual(opts, [('-a', '')])
138        self.assertEqual(args, ['arg1', '-b', '1', '--alpha', '--beta=2'])
139
140    def test_libref_examples(self):
141        s = """
142        Examples from the Library Reference:  Doc/lib/libgetopt.tex
143
144        An example using only Unix style options:
145
146
147        >>> import getopt
148        >>> args = '-a -b -cfoo -d bar a1 a2'.split()
149        >>> args
150        ['-a', '-b', '-cfoo', '-d', 'bar', 'a1', 'a2']
151        >>> optlist, args = getopt.getopt(args, 'abc:d:')
152        >>> optlist
153        [('-a', ''), ('-b', ''), ('-c', 'foo'), ('-d', 'bar')]
154        >>> args
155        ['a1', 'a2']
156
157        Using long option names is equally easy:
158
159
160        >>> s = '--condition=foo --testing --output-file abc.def -x a1 a2'
161        >>> args = s.split()
162        >>> args
163        ['--condition=foo', '--testing', '--output-file', 'abc.def', '-x', 'a1', 'a2']
164        >>> optlist, args = getopt.getopt(args, 'x', [
165        ...     'condition=', 'output-file=', 'testing'])
166        >>> optlist
167        [('--condition', 'foo'), ('--testing', ''), ('--output-file', 'abc.def'), ('-x', '')]
168        >>> args
169        ['a1', 'a2']
170        """
171
172        import types
173        m = types.ModuleType("libreftest", s)
174        run_doctest(m, verbose)
175
176    def test_issue4629(self):
177        longopts, shortopts = getopt.getopt(['--help='], '', ['help='])
178        self.assertEqual(longopts, [('--help', '')])
179        longopts, shortopts = getopt.getopt(['--help=x'], '', ['help='])
180        self.assertEqual(longopts, [('--help', 'x')])
181        self.assertRaises(getopt.GetoptError, getopt.getopt, ['--help='], '', ['help'])
182
183if __name__ == "__main__":
184    unittest.main()
185