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"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()
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