feat: launch Gemini 3 in Gemini CLI 🚀🚀🚀 (in main) (#13287)

Co-authored-by: Adam Weidman <65992621+adamfweidman@users.noreply.github.com>
Co-authored-by: Sehoon Shon <sshon@google.com>
Co-authored-by: Adib234 <30782825+Adib234@users.noreply.github.com>
Co-authored-by: Sandy Tao <sandytao520@icloud.com>
Co-authored-by: Abhi <43648792+abhipatel12@users.noreply.github.com>
Co-authored-by: Aishanee Shah <aishaneeshah@gmail.com>
Co-authored-by: gemini-cli-robot <gemini-cli-robot@google.com>
Co-authored-by: Gal Zahavi <38544478+galz10@users.noreply.github.com>
Co-authored-by: Jacob Richman <jacob314@gmail.com>
Co-authored-by: joshualitt <joshualitt@google.com>
Co-authored-by: Jenna Inouye <jinouye@google.com>

packages/cli/src/ui/components/AppHeader.test.tsx

@@ -0,0 +1,189 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { renderWithProviders } from '../../test-utils/render.js';
+import { AppHeader } from './AppHeader.js';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { makeFakeConfig } from '@google/gemini-cli-core';
+
+const persistentStateMock = vi.hoisted(() => ({
+  get: vi.fn(),
+  set: vi.fn(),
+}));
+
+vi.mock('../../utils/persistentState.js', () => ({
+  persistentState: persistentStateMock,
+}));
+
+vi.mock('../utils/terminalSetup.js', () => ({
+  getTerminalProgram: () => null,
+}));
+
+describe('<AppHeader />', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    persistentStateMock.get.mockReturnValue(0);
+  });
+
+  it('should render the banner with default text', () => {
+    const mockConfig = makeFakeConfig();
+    const uiState = {
+      bannerData: {
+        defaultText: 'This is the default banner',
+        warningText: '',
+      },
+      bannerVisible: true,
+    };
+
+    const { lastFrame, unmount } = renderWithProviders(
+      <AppHeader version="1.0.0" />,
+      { config: mockConfig, uiState },
+    );
+
+    expect(lastFrame()).toContain('This is the default banner');
+    expect(lastFrame()).toMatchSnapshot();
+    unmount();
+  });
+
+  it('should render the banner with warning text', () => {
+    const mockConfig = makeFakeConfig();
+    const uiState = {
+      bannerData: {
+        defaultText: 'This is the default banner',
+        warningText: 'There are capacity issues',
+      },
+      bannerVisible: true,
+    };
+
+    const { lastFrame, unmount } = renderWithProviders(
+      <AppHeader version="1.0.0" />,
+      { config: mockConfig, uiState },
+    );
+
+    expect(lastFrame()).toContain('There are capacity issues');
+    expect(lastFrame()).toMatchSnapshot();
+    unmount();
+  });
+
+  it('should not render the banner when no flags are set', () => {
+    const mockConfig = makeFakeConfig();
+    const uiState = {
+      bannerData: {
+        defaultText: '',
+        warningText: '',
+      },
+    };
+
+    const { lastFrame, unmount } = renderWithProviders(
+      <AppHeader version="1.0.0" />,
+      { config: mockConfig, uiState },
+    );
+
+    expect(lastFrame()).not.toContain('Banner');
+    expect(lastFrame()).toMatchSnapshot();
+    unmount();
+  });
+
+  it('should render the banner when previewFeatures is disabled', () => {
+    const mockConfig = makeFakeConfig({ previewFeatures: false });
+    const uiState = {
+      bannerData: {
+        defaultText: 'This is the default banner',
+        warningText: '',
+      },
+      bannerVisible: true,
+    };
+
+    const { lastFrame, unmount } = renderWithProviders(
+      <AppHeader version="1.0.0" />,
+      { config: mockConfig, uiState },
+    );
+
+    expect(lastFrame()).toContain('This is the default banner');
+    expect(lastFrame()).toMatchSnapshot();
+    unmount();
+  });
+
+  it('should not render the banner when previewFeatures is enabled', () => {
+    const mockConfig = makeFakeConfig({ previewFeatures: true });
+    const uiState = {
+      bannerData: {
+        defaultText: 'This is the default banner',
+        warningText: '',
+      },
+    };
+
+    const { lastFrame, unmount } = renderWithProviders(
+      <AppHeader version="1.0.0" />,
+      { config: mockConfig, uiState },
+    );
+
+    expect(lastFrame()).not.toContain('This is the default banner');
+    expect(lastFrame()).toMatchSnapshot();
+    unmount();
+  });
+
+  it('should not render the default banner if shown count is 5 or more', () => {
+    persistentStateMock.get.mockReturnValue(5);
+    const mockConfig = makeFakeConfig();
+    const uiState = {
+      bannerData: {
+        defaultText: 'This is the default banner',
+        warningText: '',
+      },
+    };
+
+    const { lastFrame, unmount } = renderWithProviders(
+      <AppHeader version="1.0.0" />,
+      { config: mockConfig, uiState },
+    );
+
+    expect(lastFrame()).not.toContain('This is the default banner');
+    expect(lastFrame()).toMatchSnapshot();
+    unmount();
+  });
+
+  it('should increment the shown count when default banner is displayed', () => {
+    persistentStateMock.get.mockReturnValue(0);
+    const mockConfig = makeFakeConfig();
+    const uiState = {
+      bannerData: {
+        defaultText: 'This is the default banner',
+        warningText: '',
+      },
+    };
+
+    const { unmount } = renderWithProviders(<AppHeader version="1.0.0" />, {
+      config: mockConfig,
+      uiState,
+    });
+
+    expect(persistentStateMock.set).toHaveBeenCalledWith(
+      'defaultBannerShownCount',
+      1,
+    );
+    unmount();
+  });
+
+  it('should render banner text with unescaped newlines', () => {
+    const mockConfig = makeFakeConfig();
+    const uiState = {
+      bannerData: {
+        defaultText: 'First line\\nSecond line',
+        warningText: '',
+      },
+      bannerVisible: true,
+    };
+
+    const { lastFrame, unmount } = renderWithProviders(
+      <AppHeader version="1.0.0" />,
+      { config: mockConfig, uiState },
+    );
+
+    expect(lastFrame()).not.toContain('First line\\nSecond line');
+    unmount();
+  });
+});