Updated test suite in the first tutorial and removed redundant snippet

docs/userguide/testing.rst

@@ -26,7 +26,7 @@ we'll test them against each other.
 Create a ``tests`` directory at the root of the project directory and create a module
 named ``test_client_server`` there (the ``test_`` prefix is important):
 
-.. literalinclude:: snippets/deployment.py
+.. literalinclude:: ../../examples/tutorial1/tests/test_client_server.py
    :language: python
 
 In the above test module, the first thing you should note is

examples/tutorial1/tests/test_client_server.py

@@ -1,23 +1,34 @@
-# isort: off
-import pytest
+from __future__ import annotations
 
-from asphalt.core import Context
-from pytest import CaptureFixture
+from collections.abc import AsyncGenerator
 
+import pytest
+from anyio import wait_all_tasks_blocked
 from echo.client import ClientComponent
 from echo.server import ServerComponent
+from pytest import CaptureFixture
+
+from asphalt.core import Context
 
 pytestmark = pytest.mark.anyio
 
 
-async def test_client_and_server(capsys: CaptureFixture[str]) -> None:
+@pytest.fixture
+async def server(capsys: CaptureFixture[str]) -> AsyncGenerator[None, None]:
     async with Context():
         server = ServerComponent()
         await server.start()
+        yield
 
+
+async def test_client_and_server(server: None, capsys: CaptureFixture[str]) -> None:
+    async with Context():
         client = ClientComponent("Hello!")
         await client.start()
+        await client.run()
 
     # Grab the captured output of sys.stdout and sys.stderr from the capsys fixture
+    await wait_all_tasks_blocked()
     out, err = capsys.readouterr()
-    assert out == "Message from client: Hello!\nServer responded: Hello!\n"
+    assert "Message from client: Hello!" in out
+    assert "Server responded: Hello!" in out