async HTTP component (#3914)

* Migrate WSGI to asyncio

* Rename wsgi -> http

* Python 3.4 compat

* Move linting to Python 3.4

* lint

* Lint

* Fix Python 3.4 mock_open + binary data

* Surpress logging aiohttp.access

* Spelling

* Sending files is a coroutine

* More callback annotations and naming fixes

* Fix ios

tests/conftest.py

@@ -0,0 +1,59 @@
+"""Setup some common test helper things."""
+import functools
+import logging
+
+import pytest
+import requests_mock as _requests_mock
+
+from homeassistant import util
+from homeassistant.util import location
+
+from .common import async_test_home_assistant
+from .test_util.aiohttp import mock_aiohttp_client
+
+logging.basicConfig()
+logging.getLogger('sqlalchemy.engine').setLevel(logging.INFO)
+
+
+def test_real(func):
+    """Force a function to require a keyword _test_real to be passed in."""
+    @functools.wraps(func)
+    def guard_func(*args, **kwargs):
+        real = kwargs.pop('_test_real', None)
+
+        if not real:
+            raise Exception('Forgot to mock or pass "_test_real=True" to %s',
+                            func.__name__)
+
+        return func(*args, **kwargs)
+
+    return guard_func
+
+# Guard a few functions that would make network connections
+location.detect_location_info = test_real(location.detect_location_info)
+location.elevation = test_real(location.elevation)
+util.get_local_ip = lambda: '127.0.0.1'
+
+
+@pytest.fixture
+def hass(loop):
+    """Fixture to provide a test instance of HASS."""
+    hass = loop.run_until_complete(async_test_home_assistant(loop))
+
+    yield hass
+
+    loop.run_until_complete(hass.async_stop())
+
+
+@pytest.fixture
+def requests_mock():
+    """Fixture to provide a requests mocker."""
+    with _requests_mock.mock() as m:
+        yield m
+
+
+@pytest.fixture
+def aioclient_mock():
+    """Fixture to mock aioclient calls."""
+    with mock_aiohttp_client() as mock_session:
+        yield mock_session