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1# Tests invocation of the interpreter with various command line arguments
2# All tests are executed with environment variables ignored
3# See test_cmd_line_script.py for testing of script execution
4
5import test.test_support, unittest
6import sys
7from test.script_helper import spawn_python, kill_python, python_exit_code
8
9
10class CmdLineTest(unittest.TestCase):
11    def start_python(self, *args):
12        p = spawn_python(*args)
13        return kill_python(p)
14
15    def exit_code(self, *args):
16        return python_exit_code(*args)
17
18    def test_directories(self):
19        self.assertNotEqual(self.exit_code('.'), 0)
20        self.assertNotEqual(self.exit_code('< .'), 0)
21
22    def verify_valid_flag(self, cmd_line):
23        data = self.start_python(cmd_line)
24        self.assertTrue(data == '' or data.endswith('\n'))
25        self.assertNotIn('Traceback', data)
26
27    def test_optimize(self):
28        self.verify_valid_flag('-O')
29        self.verify_valid_flag('-OO')
30
31    def test_q(self):
32        self.verify_valid_flag('-Qold')
33        self.verify_valid_flag('-Qnew')
34        self.verify_valid_flag('-Qwarn')
35        self.verify_valid_flag('-Qwarnall')
36
37    def test_site_flag(self):
38        self.verify_valid_flag('-S')
39
40    def test_usage(self):
41        self.assertIn('usage', self.start_python('-h'))
42
43    def test_version(self):
44        version = 'Python %d.%d' % sys.version_info[:2]
45        self.assertTrue(self.start_python('-V').startswith(version))
46
47    def test_run_module(self):
48        # Test expected operation of the '-m' switch
49        # Switch needs an argument
50        self.assertNotEqual(self.exit_code('-m'), 0)
51        # Check we get an error for a nonexistent module
52        self.assertNotEqual(
53            self.exit_code('-m', 'fnord43520xyz'),
54            0)
55        # Check the runpy module also gives an error for
56        # a nonexistent module
57        self.assertNotEqual(
58            self.exit_code('-m', 'runpy', 'fnord43520xyz'),
59            0)
60        # All good if module is located and run successfully
61        self.assertEqual(
62            self.exit_code('-m', 'timeit', '-n', '1'),
63            0)
64
65    def test_run_module_bug1764407(self):
66        # -m and -i need to play well together
67        # Runs the timeit module and checks the __main__
68        # namespace has been populated appropriately
69        p = spawn_python('-i', '-m', 'timeit', '-n', '1')
70        p.stdin.write('Timer\n')
71        p.stdin.write('exit()\n')
72        data = kill_python(p)
73        self.assertTrue(data.startswith('1 loop'))
74        self.assertIn('__main__.Timer', data)
75
76    def test_run_code(self):
77        # Test expected operation of the '-c' switch
78        # Switch needs an argument
79        self.assertNotEqual(self.exit_code('-c'), 0)
80        # Check we get an error for an uncaught exception
81        self.assertNotEqual(
82            self.exit_code('-c', 'raise Exception'),
83            0)
84        # All good if execution is successful
85        self.assertEqual(
86            self.exit_code('-c', 'pass'),
87            0)
88
89
90def test_main():
91    test.test_support.run_unittest(CmdLineTest)
92    test.test_support.reap_children()
93
94if __name__ == "__main__":
95    test_main()
96