chore: import upstream snapshot with attribution

tests/unit/shared/components/KiroAuthModal.test.tsx

@@ -0,0 +1,56 @@
+// @vitest-environment jsdom
+import React from "react";
+import { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const cleanupCallbacks: Array<() => void> = [];
+
+function makeContainer(): HTMLElement {
+  const container = document.createElement("div");
+  document.body.appendChild(container);
+  cleanupCallbacks.push(() => {
+    container.remove();
+  });
+  return container;
+}
+
+describe("KiroAuthModal", () => {
+  beforeEach(() => {
+    (
+      globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT?: boolean }
+    ).IS_REACT_ACT_ENVIRONMENT = true;
+  });
+
+  afterEach(() => {
+    while (cleanupCallbacks.length > 0) {
+      cleanupCallbacks.pop()?.();
+    }
+    document.body.innerHTML = "";
+    vi.restoreAllMocks();
+  });
+
+  it("shows Google Account and starts Google social login when clicked", async () => {
+    const { default: KiroAuthModal } = await import("@/shared/components/KiroAuthModal");
+    const container = makeContainer();
+    const root = createRoot(container);
+    const onMethodSelect = vi.fn();
+
+    await act(async () => {
+      root.render(<KiroAuthModal isOpen onClose={vi.fn()} onMethodSelect={onMethodSelect} />);
+    });
+
+    const googleButton = Array.from(container.querySelectorAll("button")).find((button) =>
+      button.textContent?.includes("Google Account")
+    );
+
+    expect(googleButton).toBeTruthy();
+    expect(googleButton?.className).not.toContain("hidden");
+
+    await act(async () => {
+      googleButton?.click();
+    });
+
+    expect(onMethodSelect).toHaveBeenCalledWith("social", { provider: "google" });
+  });
+});