Fix tests on windows

Author: Archmonger

requirements/test-env.txt

@@ -1,6 +1,6 @@
 twine
 pytest
-pytest-asyncio
+anyio
 pytest-cov
 reactpy[testing,starlette]
 nodejs-bin==18.4.0a4

tests/conftest.py

@@ -1,6 +1,4 @@
-import asyncio
 import os
-import sys
 
 import pytest
 from playwright.async_api import async_playwright
@@ -18,27 +16,25 @@ def pytest_addoption(parser) -> None:
     )
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 async def display(backend, browser):
     async with DisplayFixture(backend, browser) as display_fixture:
         display_fixture.page.set_default_timeout(10000)
         yield display_fixture
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 async def backend():
     async with BackendFixture() as backend_fixture:
         yield backend_fixture
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 async def browser(pytestconfig):
     async with async_playwright() as pw:
         yield await pw.chromium.launch(headless=True if GITHUB_ACTIONS else pytestconfig.getoption("headless"))
 
 
-@pytest.fixture
-def event_loop_policy(request):
-    if sys.platform == "win32":
-        return asyncio.WindowsProactorEventLoopPolicy()
-    return asyncio.get_event_loop_policy()
+@pytest.fixture(scope="session")
+def anyio_backend():
+    return "asyncio"

tests/test_router.py

@@ -1,6 +1,7 @@
 import os
 from typing import Any
 
+import pytest
 from playwright.async_api._generated import Browser, Page
 from reactpy import Ref, component, html, use_location, use_state
 from reactpy.testing import DisplayFixture
@@ -9,6 +10,7 @@
 
 GITHUB_ACTIONS = os.getenv("GITHUB_ACTIONS", "").lower() == "true"
 CLICK_DELAY = 500 if GITHUB_ACTIONS else 25  # Delay in miliseconds.
+pytestmark = pytest.mark.anyio
 
 
 async def test_simple_router(display: DisplayFixture):