chore: import upstream snapshot with attribution

showcase/integrations/langgraph-python/tests/e2e/agentic-chat.spec.ts

@@ -0,0 +1,67 @@
+import { test, expect } from "@playwright/test";
+
+// Agentic Chat is the minimum-viable CopilotChat demo: a tiny page
+// that wraps `<CopilotChat>` plus three starter-prompt suggestions. The
+// contract here is "vanilla chat works end-to-end" — anything richer
+// belongs in dedicated demos (frontend-tools, tool-rendering, etc.).
+test.describe("Agentic Chat", () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto("/demos/agentic-chat");
+  });
+
+  test("page loads with chat input and the three starter suggestions", async ({
+    page,
+  }) => {
+    await expect(page.getByPlaceholder("Type a message")).toBeVisible();
+    for (const title of ["Write a sonnet", "Tell me a joke", "Is 17 prime?"]) {
+      await expect(page.getByRole("button", { name: title })).toBeVisible({
+        timeout: 15000,
+      });
+    }
+  });
+
+  test("sends a typed message and gets an assistant response", async ({
+    page,
+  }) => {
+    const input = page.getByPlaceholder("Type a message");
+    await input.fill("Say hello in one word.");
+    await input.press("Enter");
+
+    await expect(
+      page.locator('[data-testid="copilot-assistant-message"]').first(),
+    ).toBeVisible({ timeout: 30000 });
+  });
+
+  test("clicking a suggestion pill sends the message and gets a response", async ({
+    page,
+  }) => {
+    await page.getByRole("button", { name: "Tell me a joke" }).click();
+
+    await expect(
+      page.locator('[data-testid="copilot-assistant-message"]').first(),
+    ).toBeVisible({ timeout: 30000 });
+  });
+
+  test("multi-turn conversation maintains context", async ({ page }) => {
+    const input = page.getByPlaceholder("Type a message");
+
+    await input.fill("My name is Alice.");
+    await input.press("Enter");
+    await expect(
+      page.locator('[data-testid="copilot-assistant-message"]').first(),
+    ).toBeVisible({ timeout: 30000 });
+
+    // Wait for the chat to settle (suggestions reappear after the assistant
+    // finishes streaming) before sending the follow-up message.
+    await expect(
+      page.getByRole("button", { name: "Write a sonnet" }),
+    ).toBeVisible({ timeout: 10000 });
+
+    await input.fill("What name did I just give you?");
+    await input.press("Enter");
+
+    const responses = page.locator('[data-testid="copilot-assistant-message"]');
+    await expect(responses.nth(1)).toBeVisible({ timeout: 30000 });
+    await expect(responses.nth(1)).toContainText(/Alice/i, { timeout: 5000 });
+  });
+});