summaryrefslogtreecommitdiffstats
path: root/Lib/test/test_code_module.py
blob: 24db0ace80122e707b77aad253c5045994008fa9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
"Test InteractiveConsole and InteractiveInterpreter from code module"
import sys
import unittest
from textwrap import dedent
from contextlib import ExitStack
from unittest import mock
from test import support

code = support.import_module('code')


class TestInteractiveConsole(unittest.TestCase):

    def setUp(self):
        self.console = code.InteractiveConsole()
        self.mock_sys()

    def mock_sys(self):
        "Mock system environment for InteractiveConsole"
        # use exit stack to match patch context managers to addCleanup
        stack = ExitStack()
        self.addCleanup(stack.close)
        self.infunc = stack.enter_context(mock.patch('code.input',
                                          create=True))
        self.stdout = stack.enter_context(mock.patch('code.sys.stdout'))
        self.stderr = stack.enter_context(mock.patch('code.sys.stderr'))
        prepatch = mock.patch('code.sys', wraps=code.sys, spec=code.sys)
        self.sysmod = stack.enter_context(prepatch)
        if sys.excepthook is sys.__excepthook__:
            self.sysmod.excepthook = self.sysmod.__excepthook__
        del self.sysmod.ps1
        del self.sysmod.ps2

    def test_ps1(self):
        self.infunc.side_effect = EOFError('Finished')
        self.console.interact()
        self.assertEqual(self.sysmod.ps1, '>>> ')
        self.sysmod.ps1 = 'custom1> '
        self.console.interact()
        self.assertEqual(self.sysmod.ps1, 'custom1> ')

    def test_ps2(self):
        self.infunc.side_effect = EOFError('Finished')
        self.console.interact()
        self.assertEqual(self.sysmod.ps2, '... ')
        self.sysmod.ps1 = 'custom2> '
        self.console.interact()
        self.assertEqual(self.sysmod.ps1, 'custom2> ')

    def test_console_stderr(self):
        self.infunc.side_effect = ["'antioch'", "", EOFError('Finished')]
        self.console.interact()
        for call in list(self.stdout.method_calls):
            if 'antioch' in ''.join(call[1]):
                break
        else:
            raise AssertionError("no console stdout")

    def test_syntax_error(self):
        self.infunc.side_effect = ["undefined", EOFError('Finished')]
        self.console.interact()
        for call in self.stderr.method_calls:
            if 'NameError' in ''.join(call[1]):
                break
        else:
            raise AssertionError("No syntax error from console")

    def test_sysexcepthook(self):
        self.infunc.side_effect = ["raise ValueError('')",
                                    EOFError('Finished')]
        hook = mock.Mock()
        self.sysmod.excepthook = hook
        self.console.interact()
        self.assertTrue(hook.called)

    def test_banner(self):
        # with banner
        self.infunc.side_effect = EOFError('Finished')
        self.console.interact(banner='Foo')
        self.assertEqual(len(self.stderr.method_calls), 3)
        banner_call = self.stderr.method_calls[0]
        self.assertEqual(banner_call, ['write', ('Foo\n',), {}])

        # no banner
        self.stderr.reset_mock()
        self.infunc.side_effect = EOFError('Finished')
        self.console.interact(banner='')
        self.assertEqual(len(self.stderr.method_calls), 2)

    def test_exit_msg(self):
        # default exit message
        self.infunc.side_effect = EOFError('Finished')
        self.console.interact(banner='')
        self.assertEqual(len(self.stderr.method_calls), 2)
        err_msg = self.stderr.method_calls[1]
        expected = 'now exiting InteractiveConsole...\n'
        self.assertEqual(err_msg, ['write', (expected,), {}])

        # no exit message
        self.stderr.reset_mock()
        self.infunc.side_effect = EOFError('Finished')
        self.console.interact(banner='', exitmsg='')
        self.assertEqual(len(self.stderr.method_calls), 1)

        # custom exit message
        self.stderr.reset_mock()
        message = (
            'bye! \N{GREEK SMALL LETTER ZETA}\N{CYRILLIC SMALL LETTER ZHE}'
            )
        self.infunc.side_effect = EOFError('Finished')
        self.console.interact(banner='', exitmsg=message)
        self.assertEqual(len(self.stderr.method_calls), 2)
        err_msg = self.stderr.method_calls[1]
        expected = message + '\n'
        self.assertEqual(err_msg, ['write', (expected,), {}])


    def test_cause_tb(self):
        self.infunc.side_effect = ["raise ValueError('') from AttributeError",
                                    EOFError('Finished')]
        self.console.interact()
        output = ''.join(''.join(call[1]) for call in self.stderr.method_calls)
        expected = dedent("""
        AttributeError

        The above exception was the direct cause of the following exception:

        Traceback (most recent call last):
          File "<console>", line 1, in <module>
        ValueError
        """)
        self.assertIn(expected, output)

    def test_context_tb(self):
        self.infunc.side_effect = ["try: ham\nexcept: eggs\n",
                                    EOFError('Finished')]
        self.console.interact()
        output = ''.join(''.join(call[1]) for call in self.stderr.method_calls)
        expected = dedent("""
        Traceback (most recent call last):
          File "<console>", line 1, in <module>
        NameError: name 'ham' is not defined

        During handling of the above exception, another exception occurred:

        Traceback (most recent call last):
          File "<console>", line 2, in <module>
        NameError: name 'eggs' is not defined
        """)
        self.assertIn(expected, output)


if __name__ == "__main__":
    unittest.main()