tests: Add tutorial test

I already broke the tutorial way too often. Add a test case.

tests/test_tutorial.py

@@ -0,0 +1,23 @@
+async def test_tutorial(vms):
+    async with vms.hub.ssh_task("not-my-board hub", "hub", wait_ready=True):
+        async with vms.hub.ssh_task(
+            "python3 -m http.server -d ./src/tests/tutorial -b localhost 8080",
+            "http_server",
+        ):
+            async with vms.hub.ssh_task(
+                "not-my-board export http://localhost:2092 ./src/tests/tutorial/tutorial-tcp-place.toml",
+                "export",
+                wait_ready=True,
+            ):
+                async with vms.hub.ssh_task_root(
+                    "not-my-board agent http://localhost:2092", "agent", wait_ready=True
+                ):
+                    await vms.hub.ssh(
+                        "doas not-my-board attach ./src/tests/tutorial/tutorial-tcp.toml"
+                    )
+
+                    await vms.hub.ssh_poll("nc -z localhost 8080")
+                    result = await vms.hub.ssh(
+                        "wget -qO - http://localhost:8081/hello", prefix="wget"
+                    )
+                    assert result.stdout.rstrip() == "Hello, World!"

tests/tutorial/hello

@@ -0,0 +1 @@
+Hello, World!

tests/tutorial/tutorial-tcp-place.toml

@@ -0,0 +1,5 @@
+port = 2192
+
+[[parts]]
+compatible = [ "tutorial-http-server" ]
+tcp.http = { host = "localhost", port = 8080 }

tests/tutorial/tutorial-tcp.toml

@@ -0,0 +1,3 @@
+[parts.http-server]
+compatible = [ "tutorial-http-server" ]
+tcp.http = { local_port = 8081 }