test: wait for Home Assistant restart

packages/integrations/test/home-assistant.spec.ts

@@ -77,9 +77,29 @@ const prepareHomeAssistantContainerAsync = async () => {
   const startedContainer = await homeAssistantContainer.start();
   await startedContainer.exec(["unzip", "-o", "/tmp/config.zip", "-d", "/config"]);
   await startedContainer.restart();
+  await waitForHomeAssistantAsync(startedContainer);
   return startedContainer;
 };
 
+const waitForHomeAssistantAsync = async (container: StartedTestContainer) => {
+  const url = `http://${container.getHost()}:${container.getMappedPort(8123)}/api/config`;
+
+  for (let attempt = 0; attempt < 40; attempt++) {
+    try {
+      const response = await fetch(url, {
+        headers: { Authorization: `Bearer ${DEFAULT_API_KEY}` },
+      });
+      if (response.ok) return;
+    } catch {
+      // Home Assistant is still restarting.
+    }
+
+    await new Promise((resolve) => setTimeout(resolve, 500));
+  }
+
+  throw new Error("Home Assistant did not become ready after restart");
+};
+
 const createHomeAssistantContainer = () => {
   return (
     new GenericContainer(IMAGE_NAME)