Test failures on access of sys.ps1 and sys.ps2

[TimothyFitz]

I'm trying to fix an unrelated bug, and ran into 2 tests that aren't currently passing. Run inside pipenv with pytest, python 3.6.5 on Ubuntu 18.04.

Looking at the docs, sys.ps1 and sys.ps2 shouldn't be available outside of a python process started in interactive mode, so it seems like the test should fail. That's confusing, because aiomanhole 0.5.0 is successfully running in our gunicorn/aiohttp server which definitely isn't a python process started in interactive mode.

(aiomanhole-YgGsKdnF) timothyfitz@timothy-yoga-mk2:~/Packages/aiomanhole$ pytest ./test_aiomanhole.py 
========================================================== test session starts ==========================================================
platform linux -- Python 3.6.5, pytest-3.7.1, py-1.5.4, pluggy-0.7.1
rootdir: /home/timothyfitz/Packages/aiomanhole, inifile:
collected 21 items                                                                                                                      

test_aiomanhole.py .............FF......                                                                                          [100%]

=============================================================== FAILURES ================================================================
__________________________________________ TestInteractiveInterpreter.test_write_prompt[True] ___________________________________________

self = <test_aiomanhole.TestInteractiveInterpreter object at 0x7fc62ac9ba58>
interpreter = <aiomanhole.InteractiveInterpreter object at 0x7fc62ac9bb00>
loop = <_UnixSelectorEventLoop running=False closed=False debug=False>, partial = True

    @pytest.mark.parametrize('partial', [True, False])
    def test_write_prompt(self, interpreter, loop, partial):
        with mock.patch.object(interpreter.compiler, 'is_partial_command', return_value=partial):
>           loop.run_until_complete(interpreter.write_prompt())

test_aiomanhole.py:157: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.6/asyncio/base_events.py:468: in run_until_complete
    return future.result()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <aiomanhole.InteractiveInterpreter object at 0x7fc62ac9bb00>

    @asyncio.coroutine
    def write_prompt(self):
        writer = self.writer
    
        if self.compiler.is_partial_command():
>           writer.write(sys.ps2.encode('utf8'))
E           AttributeError: module 'sys' has no attribute 'ps2'

aiomanhole/__init__.py:114: AttributeError
__________________________________________ TestInteractiveInterpreter.test_write_prompt[False] __________________________________________

self = <test_aiomanhole.TestInteractiveInterpreter object at 0x7fc62aa0a2e8>
interpreter = <aiomanhole.InteractiveInterpreter object at 0x7fc62aa0a4a8>
loop = <_UnixSelectorEventLoop running=False closed=False debug=False>, partial = False

    @pytest.mark.parametrize('partial', [True, False])
    def test_write_prompt(self, interpreter, loop, partial):
        with mock.patch.object(interpreter.compiler, 'is_partial_command', return_value=partial):
>           loop.run_until_complete(interpreter.write_prompt())

test_aiomanhole.py:157: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.6/asyncio/base_events.py:468: in run_until_complete
    return future.result()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <aiomanhole.InteractiveInterpreter object at 0x7fc62aa0a4a8>

    @asyncio.coroutine
    def write_prompt(self):
        writer = self.writer
    
        if self.compiler.is_partial_command():
            writer.write(sys.ps2.encode('utf8'))
        else:
>           writer.write(sys.ps1.encode('utf8'))
E           AttributeError: module 'sys' has no attribute 'ps1'

aiomanhole/__init__.py:116: AttributeError
================================================== 2 failed, 19 passed in 0.17 seconds ==================================================