cpython/Lib/test/test_code_module.py

156 lines
5.5 KiB
Python

"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.support import import_helper
code = import_helper.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()