chore: import upstream snapshot with attribution

showcase/integrations/langgraph-python/tests/e2e/shared-state-read-write.spec.ts

@@ -0,0 +1,78 @@
+import { test, expect } from "@playwright/test";
+
+// Shared State (Read + Write) — Preferences + Scratch Pad demo. The page
+// publishes `agent.state.preferences` via setState, and the agent writes
+// back via its `set_notes` tool. All three pills must hit
+// shared-state-specific fixtures rather than falling through to the bare
+// "hi" / "plan" catch-alls in feature-parity.json.
+test.describe("Shared State (Read + Write)", () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto("/demos/shared-state-read-write");
+  });
+
+  test("preferences panel and agent scratch pad both mount", async ({
+    page,
+  }) => {
+    await expect(page.getByText("Your preferences")).toBeVisible({
+      timeout: 15000,
+    });
+    await expect(page.getByText("Agent Scratch pad")).toBeVisible({
+      timeout: 15000,
+    });
+  });
+
+  test("starter suggestions render", async ({ page }) => {
+    for (const title of ["Greet me", "Remember something", "Plan a weekend"]) {
+      await expect(page.getByRole("button", { name: title })).toBeVisible({
+        timeout: 15000,
+      });
+    }
+  });
+
+  // Regression for the wrong-fixture-fallthrough bug:
+  // The Greet me pill ("Say hi and introduce yourself.") was matching
+  // feature-parity.json's bare `userMessage: "hi"` fixture and replying
+  // with the generic showcase-assistant blurb ("Hi there! I'm your
+  // showcase assistant. I can help with weather, charts, meetings…").
+  // Likewise, Plan a weekend ("Suggest a weekend plan based on my
+  // interests.") was matching the bare `userMessage: "plan"` fixture and
+  // replying with a generic 5-step content-marketing plan. Fix: add
+  // d5-all.json fixtures with longer substring matchers that win first.
+  test("Greet me pill returns a shared-state-aware greeting, not the generic showcase blurb", async ({
+    page,
+  }) => {
+    test.setTimeout(120_000);
+
+    await page.getByRole("button", { name: /^Greet me$/i }).click();
+
+    const assistantMessage = page
+      .locator('[data-testid="copilot-assistant-message"]')
+      .last();
+    await expect(assistantMessage).toContainText(/shared-state co-pilot/i, {
+      timeout: 60_000,
+    });
+    // Negative assertion: the wrong-fixture response is gone.
+    await expect(assistantMessage).not.toContainText(
+      /showcase assistant\. I can help with weather, charts/i,
+    );
+  });
+
+  test("Plan a weekend pill returns an interests-aware plan, not the generic content-marketing plan", async ({
+    page,
+  }) => {
+    test.setTimeout(120_000);
+
+    await page.getByRole("button", { name: /^Plan a weekend$/i }).click();
+
+    const assistantMessage = page
+      .locator('[data-testid="copilot-assistant-message"]')
+      .last();
+    await expect(assistantMessage).toContainText(/interests panel/i, {
+      timeout: 60_000,
+    });
+    // Negative assertion: the wrong-fixture response is gone.
+    await expect(assistantMessage).not.toContainText(
+      /Research the topic.*Outline key points/is,
+    );
+  });
+});