ported test scripts to unit tests (jonashaag#52)

Signed-off-by: Oleg Höfling <oleg.hoefling@gmail.com>

.coveragerc

@@ -0,0 +1,6 @@
+[run]
+source = .
+omit =
+    */tests_new/*
+    */.tox/*
+    setup.py

pytests/conftest.py

@@ -0,0 +1,244 @@
+from tblib import pickling_support
+
+pickling_support.install()
+
+import contextlib
+import functools
+import multiprocessing as mp
+import os
+import posixpath
+import signal
+import socket
+import sys
+import tempfile
+from six import reraise as raise_
+from six.moves.urllib.parse import quote, urljoin, urlunsplit
+
+import pytest
+import requests
+import requests_unixsocket
+
+import bjoern
+
+
+def free_port():
+    with contextlib.closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
+        s.bind(('', 0))
+        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        port = s.getsockname()[1]
+    return port
+
+
+class ErrorHandleMiddleware:
+    def __init__(self, app, pipe=None):
+        self.app = app
+        self.pipe = pipe
+
+    def __call__(self, *args, **kwargs):
+        try:
+            return self.app(*args, **kwargs)
+        except Exception as e:
+            if self.pipe is not None:
+                exc_info = sys.exc_info()
+                exc_type = exc_info[0]
+                tb = exc_info[2]
+                self.pipe.send((exc_type, e, tb))
+            raise e
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_runtest_call(item):
+    yield
+    if client.__name__ in item.funcargs.keys():
+        # check for uncaught errors in server process, raise if any
+        testclient = item.funcargs[client.__name__]
+        testclient._reraise_app_errors()
+
+
+def reraise(f):
+    @functools.wraps(f)
+    def wrapper(*args, **kwargs):
+        result = f(*args, **kwargs)
+        testclient = args[0]
+        testclient._reraise_app_errors()
+        return result
+
+    return wrapper
+
+
+class Client(object):
+    host = None
+    port = None
+
+    _error_publisher = None
+    _error_receiver = None
+    _proc = None
+    _session = None
+    _sock = None
+
+    def __init__(self):
+        self.reuse_port = False
+        self.listen_backlog = bjoern.DEFAULT_LISTEN_BACKLOG
+        self._children = []
+
+    @property
+    def session(self):
+        return self._session
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, type, value, tb):
+        self.stop()
+
+    def start(self, wsgi_app, num_workers=1):
+        assert self._sock is not None
+        num_workers = max(num_workers, 1)
+        (self._error_receiver, self._error_publisher) = mp.Pipe(False)
+        for _ in range(num_workers):
+            errorhandler = ErrorHandleMiddleware(wsgi_app, self._error_publisher)
+            child = mp.Process(
+                target=bjoern.server_run, args=(self._sock, errorhandler)
+            )
+            child.start()
+            self._children.append(child)
+
+    def stop(self):
+        if self._sock is None:
+            return
+        self.session.close()
+        self._error_publisher.close()
+        self._error_receiver.close()
+        for child in self._children:
+            os.kill(child.pid, signal.SIGTERM)
+            child.join()
+        if self._sock.family == socket.AF_UNIX:
+            filename = self._sock.getsockname()
+            if filename[0] != '\0':
+                os.unlink(self._sock.getsockname())
+        self._sock.close()
+
+    def _reraise_app_errors(self, timeout=0):
+        exc_info = None
+        try:
+            if self._error_receiver.poll(timeout):
+                exc_info = self._error_receiver.recv()
+        except EOFError:
+            return
+        if exc_info is not None:
+            raise_(*exc_info)  # python2 compat
+
+    @reraise
+    def get(self, path=None, **kwargs):
+        """Adapter for :py:meth:`requests.Session.get`"""
+        return self.session.get(self._join(self.root, (path or '')), **kwargs)
+
+    @reraise
+    def options(self, path=None, **kwargs):
+        """Adapter for :py:meth:`requests.Session.options`"""
+        return self.session.options(self._join(self.root, (path or '')), **kwargs)
+
+    @reraise
+    def head(self, path=None, **kwargs):
+        """Adapter for :py:meth:`requests.Session.head`"""
+        return self.session.head(self._join(self.root, (path or '')), **kwargs)
+
+    @reraise
+    def post(self, path=None, data=None, json=None, **kwargs):
+        """Adapter for :py:meth:`requests.Session.post`"""
+        return self.session.post(
+            self._join(self.root, (path or '')), data=data, json=json, **kwargs
+        )
+
+    @reraise
+    def put(self, path=None, data=None, **kwargs):
+        """Adapter for :py:meth:`requests.Session.put`"""
+        return self.session.put(
+            self._join(self.root, (path or '')), data=data, **kwargs
+        )
+
+    @reraise
+    def patch(self, path=None, data=None, **kwargs):
+        """Adapter for :py:meth:`requests.Session.patch`"""
+        return self.session.patch(
+            self._join(self.root, (path or '')), data=data, **kwargs
+        )
+
+    @reraise
+    def delete(self, path=None, **kwargs):
+        """Adapter for :py:meth:`requests.Session.delete`"""
+        return self.session.delete(self._join(self.root, (path or '')), **kwargs)
+
+
+class HttpClient(Client):
+    _join = functools.partial(urljoin)
+
+    def __init__(self, host='127.0.0.1', port=None):
+        self.host = host
+        self.port = port
+        super(HttpClient, self).__init__()
+
+    def start(self, wsgi_app, num_workers=1):
+        self._session = requests.Session()
+        self.port = self.port or free_port()
+        self._sock = bjoern.bind_and_listen(
+            self.host,
+            port=self.port,
+            reuse_port=self.reuse_port,
+            listen_backlog=self.listen_backlog,
+        )
+        super(HttpClient, self).start(wsgi_app, num_workers)
+
+    @property
+    def root(self):
+        return urlunsplit(('http', '{}:{}'.format(self.host, self.port), '', '', ''))
+
+
+class UnixClient(Client):
+    _join = functools.partial(posixpath.join)
+
+    def start(self, wsgi_app, num_workers=1):
+        self._session = requests_unixsocket.Session()
+        self._sock = bjoern.bind_and_listen(
+            'unix:{}'.format(self.host),
+            port=self.port,
+            listen_backlog=self.listen_backlog,
+        )
+        super(UnixClient, self).start(wsgi_app, num_workers)
+
+    @property
+    def root(self):
+        return urlunsplit(('http+unix', quote(self.host, safe=''), '', '', ''))
+
+
+@pytest.fixture(params=('HttpClient', 'UnixClient'))
+def client(request):
+    return request.getfixturevalue(request.param.lower())
+
+
+@pytest.fixture
+def httpclient():
+    with HttpClient() as client:
+        yield client
+
+
+@pytest.fixture
+def unixclient():
+    """
+    * don't use pytest's tmpdir/tmp_path as the generated paths easily exceed 108 chars,
+    causing an "OSError: AF_UNIX path too long" on MacOS
+    * also, filenames longer than 64 chars cause urllib hickups, see https://bugs.python.org/issue32958
+    * another thing: tempfile.gettempdir() on MacOS resorts to $TMPDIR
+    which is autogenerated into /var/folders and is also longer than 64 chars
+    """
+    if sys.platform == 'darwin':
+        tmpdir = '/tmp'  # yikes! but should be short enough
+    else:
+        tmpdir = tempfile.gettempdir()
+    with tempfile.NamedTemporaryFile(
+        prefix='bjoern', suffix='.sock', dir=tmpdir, delete=True
+    ) as temp:
+        file = temp.name
+    with UnixClient() as client:
+        client.host = file
+        yield client