~nhoad/aiomanhole

ref: 7da80473a3408554f84f5e718ea316dc9be9cdc3 aiomanhole/test_aiomanhole.py -rw-r--r-- 6.3 KiB View raw
7da80473 — Nathan Hoad Fixes #4. 11 months ago
                                                                                
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import asyncio
from contextlib import contextmanager
import os
import shutil
import tempfile

from io import BytesIO
from unittest import mock

import pytest

from aiomanhole import StatefulCommandCompiler, InteractiveInterpreter, start_manhole


@pytest.fixture(scope='function')
def compiler():
    return StatefulCommandCompiler()


@pytest.fixture(scope='function')
def interpreter(loop):
    s = InteractiveInterpreter({}, '', loop)
    s.reader = MockStream()
    s.writer = MockStream()

    return s


@pytest.fixture(scope='function')
def loop():
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(None)
    return loop

@contextmanager
def tcp_server(loop):
    (server,) = loop.run_until_complete(start_manhole(port=0, loop=loop))
    (socket,) = server.sockets
    (ip, port) = socket.getsockname()

    yield loop.run_until_complete(asyncio.open_connection('127.0.0.1', port, loop=loop))

    server.close()
    loop.run_until_complete(server.wait_closed())

@contextmanager
def unix_server(loop):
    directory = tempfile.mkdtemp()

    try:
        domain_socket = os.path.join(directory, 'aiomanhole')
        (server,) = loop.run_until_complete(start_manhole(path=domain_socket, loop=loop))

        yield loop.run_until_complete(asyncio.open_unix_connection(path=domain_socket, loop=loop))

        server.close()
        loop.run_until_complete(server.wait_closed())

    finally:
        shutil.rmtree(directory)


async def send_command(message, reader, writer, loop):
    # Prompt on connect
    assert await reader.read(4) == b'>>> '

    # Send message
    writer.write(message)

    # Read until we see the next prompt, then strip off the prompt
    prompt = b'\n>>>'
    response = await reader.readuntil(separator=prompt)
    writer.close()
    return response[:-len(prompt)]


class MockStream:
    def __init__(self):
        self.buf = BytesIO()

    def write(self, data):
        self.buf.write(data)

    @asyncio.coroutine
    def drain(self):
        yield
        pass

    @asyncio.coroutine
    def readline(self):
        yield
        self.buf.seek(0)
        return self.buf.readline()


class TestStatefulCommandCompiler:
    def test_one_line(self, compiler):
        f = compiler(b'f = 5')
        assert f is not None
        ns = {}
        eval(f, ns)
        assert ns['f'] == 5

        f = compiler(b'5')
        assert f is not None
        eval(f, {})

        assert __builtins__['_'] == 5

        assert compiler(b'import asyncio') is not None

    MULTI_LINE_1 = [
        b'try:',
        b'    raise Exception',
        b'except:',
        b'    pass',
        b'',
    ]

    MULTI_LINE_2 = [
        b'for i in range(2):',
        b'    pass',
        b'',
    ]

    MULTI_LINE_3 = [
        b'while False:',
        b'    pass',
        b'',
    ]

    MULTI_LINE_4 = [
        b'class Foo:',
        b'    pass',
        b'',
    ]

    MULTI_LINE_5 = [
        b'def foo():',
        b'    pass',
        b'',
    ]

    MULTI_LINE_6 = [
        b'if False:',
        b'    pass',
        b'',
    ]

    MULTI_LINE_7 = [
        b'@decorated',
        b'def foo():',
        b'    pass',
        b'',
    ]

    @pytest.mark.parametrize('input', [
        MULTI_LINE_1,
        MULTI_LINE_2,
        MULTI_LINE_4,
        MULTI_LINE_4,
        MULTI_LINE_5,
        MULTI_LINE_6,
        MULTI_LINE_7,
    ])
    def test_multi_line(self, compiler, input):
        for line in input[:-1]:
            assert compiler(line) is None

        codeobj = compiler(input[-1])

        assert codeobj is not None

    def test_multi_line__fails_on_missing_line_ending(self, compiler):
        lines = [
            b'@decorated',
            b'def foo():',
            b'    pass',
        ]
        for line in lines[:-1]:
            assert compiler(line) is None

        codeobj = compiler(lines[-1])

        assert codeobj is None


class TestInteractiveInterpreter:
    @pytest.mark.parametrize('banner,expected_result', [
        (b'straight up bytes', b'straight up bytes'),
        ('dat unicode tho', b'dat unicode tho'),
        (None, b''),
        (object(), ValueError),
    ])
    def test_get_banner(self, banner, expected_result, interpreter):
        if isinstance(expected_result, type) and issubclass(expected_result, Exception):
            pytest.raises(expected_result, interpreter.get_banner, banner)
        else:
            assert interpreter.get_banner(banner) == expected_result

    @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):
            with mock.patch('sys.ps1', '>>> ', create=True), mock.patch('sys.ps2', '... ', create=True):
                loop.run_until_complete(interpreter.write_prompt())

        expected_value = b'... ' if partial else b'>>> '
        assert interpreter.writer.buf.getvalue() == expected_value

    @pytest.mark.parametrize('line,partial', [
        (b'f = 5', False),
        (b'def foo():', True),
    ])
    def test_read_command(self, interpreter, loop, line, partial):
        interpreter.reader.write(line)
        f = loop.run_until_complete(interpreter.read_command())

        if partial:
            assert f is None
        else:
            assert f is not None

    def test_read_command__raises_on_empty_read(self, interpreter, loop):
        pytest.raises(ConnectionResetError, loop.run_until_complete, interpreter.read_command())

    @pytest.mark.parametrize('value,stdout,expected_output', [
        (5, '', b'5\n'),
        (5, 'hello', b'5\nhello'),
        (None, 'hello', b'hello'),
    ])
    def test_send_output(self, interpreter, loop, value, stdout, expected_output):
        loop.run_until_complete(interpreter.send_output(value, stdout))

        output = interpreter.writer.buf.getvalue()
        assert output == expected_output

    @pytest.mark.parametrize('stdin,expected_output', [
        (b'print("hello")', b'hello'),
        (b'101', b'101'),
    ])
    @pytest.mark.parametrize('server_factory', [tcp_server, unix_server])
    def test_command_over_localhost_network(self, loop, server_factory, stdin, expected_output):
        with server_factory(loop=loop) as (reader, writer):
            output = loop.run_until_complete(send_command(stdin + b'\n', reader, writer, loop))
            assert output == expected_output