test(web): add chat-stream helper, thread fixture, and smoke spec

surfsense_web/tests/smoke/chat-stream.spec.ts

@@ -0,0 +1,32 @@
+import { expect, test } from "../fixtures";
+import { authHeaders, BACKEND_URL } from "../helpers/api/auth";
+import { streamChatToCompletion } from "../helpers/api/chat";
+
+test.describe("Smoke", () => {
+	test("chat stream completes for an unrelated query", async ({
+		request,
+		apiToken,
+		searchSpace,
+	}) => {
+		const threadResponse = await request.post(`${BACKEND_URL}/api/v1/threads`, {
+			headers: authHeaders(apiToken),
+			data: {
+				title: "e2e-chat-stream-smoke",
+				search_space_id: searchSpace.id,
+				visibility: "PRIVATE",
+			},
+		});
+		expect(threadResponse.ok()).toBeTruthy();
+
+		const thread = (await threadResponse.json()) as { id: number };
+		const chat = await streamChatToCompletion(request, apiToken, {
+			searchSpaceId: searchSpace.id,
+			threadId: thread.id,
+			query: "E2E_NO_RELEVANT_CONTENT_SMOKE",
+		});
+
+		expect(chat.events.some((event) => event.type === "done")).toBeTruthy();
+		expect(chat.events.some((event) => event.type === "text-delta")).toBeTruthy();
+		expect(chat.assistantText).toContain("No relevant indexed content found.");
+	});
+});