Fix Ctrl+C and tests on Windows. (#1808)

* Fix Ctrl+C on Windows.

* Disable testing of a function N/A on Windows.

* Add test for coverage, avoid crash on missing _stopping.

* Initialise StreamingHTTPResponse.protocol = None

* Improved comments.

* Reduce amount of data in test_request_stream to avoid failures on Windows.

* The Windows test doesn't work on Windows :(

* Use port numbers more likely to be free than 8000.

* Disable the other signal tests on Windows as well.

* Windows doesn't properly support SO_REUSEADDR, so that's disabled in Python, and thus rebinding fails. For successful testing, reuse port instead.

* app.run argument handling: added server kwargs (alike create_server), added warning on extra kwargs, made auto_reload explicit argument. Another go at Windows tests

* Revert "app.run argument handling: added server kwargs (alike create_server), added warning on extra kwargs, made auto_reload explicit argument. Another go at Windows tests"

This reverts commit dc5d682448.

* Use random test server port on most tests. Should avoid port/addr reuse issues.

* Another test to random port instead of 8000.

* Fix deprecation warnings about missing name on Sanic() in tests.

* Linter and typing

* Increase test coverage

* Rewrite test for ctrlc_windows_workaround

* py36 compat

* py36 compat

* py36 compat

* Don't rely on loop internals but add a stopping flag to app.

* App may be restarted.

* py36 compat

* Linter

* Add a constant for OS checking.

Co-authored-by: L. Kärkkäinen <tronic@users.noreply.github.com>

tests/test_app.py

@@ -6,6 +6,7 @@ from inspect import isawaitable
 
 import pytest
 
+from sanic import Sanic
 from sanic.exceptions import SanicException
 from sanic.response import text
 
@@ -48,6 +49,7 @@ def test_asyncio_server_no_start_serving(app):
     if not uvloop_installed():
         loop = asyncio.get_event_loop()
         asyncio_srv_coro = app.create_server(
+            port=43123,
             return_asyncio_server=True,
             asyncio_server_kwargs=dict(start_serving=False),
         )
@@ -61,6 +63,7 @@ def test_asyncio_server_start_serving(app):
     if not uvloop_installed():
         loop = asyncio.get_event_loop()
         asyncio_srv_coro = app.create_server(
+            port=43124,
             return_asyncio_server=True,
             asyncio_server_kwargs=dict(start_serving=False),
         )
@@ -199,10 +202,17 @@ def test_handle_request_with_nested_sanic_exception(app, monkeypatch, caplog):
 
     with caplog.at_level(logging.ERROR):
         request, response = app.test_client.get("/")
+    port = request.server_port
+    assert port > 0
     assert response.status == 500
     assert "Mock SanicException" in response.text
     assert (
         "sanic.root",
         logging.ERROR,
-        "Exception occurred while handling uri: 'http://127.0.0.1:42101/'",
+        f"Exception occurred while handling uri: 'http://127.0.0.1:{port}/'",
     ) in caplog.record_tuples
+
+
+def test_app_name_required():
+    with pytest.deprecated_call():
+        Sanic()