Improve code coverage for cli package (#13724)

packages/cli/src/core/initializer.test.ts

@@ -0,0 +1,148 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { initializeApp } from './initializer.js';
+import {
+  IdeClient,
+  logIdeConnection,
+  logCliConfiguration,
+  type Config,
+} from '@google/gemini-cli-core';
+import { performInitialAuth } from './auth.js';
+import { validateTheme } from './theme.js';
+import { type LoadedSettings } from '../config/settings.js';
+
+vi.mock('@google/gemini-cli-core', async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import('@google/gemini-cli-core')>();
+  return {
+    ...actual,
+    IdeClient: {
+      getInstance: vi.fn(),
+    },
+    logIdeConnection: vi.fn(),
+    logCliConfiguration: vi.fn(),
+    StartSessionEvent: vi.fn(),
+    IdeConnectionEvent: vi.fn(),
+  };
+});
+
+vi.mock('./auth.js', () => ({
+  performInitialAuth: vi.fn(),
+}));
+
+vi.mock('./theme.js', () => ({
+  validateTheme: vi.fn(),
+}));
+
+describe('initializer', () => {
+  let mockConfig: {
+    getToolRegistry: ReturnType<typeof vi.fn>;
+    getIdeMode: ReturnType<typeof vi.fn>;
+    getGeminiMdFileCount: ReturnType<typeof vi.fn>;
+  };
+  let mockSettings: LoadedSettings;
+  let mockIdeClient: {
+    connect: ReturnType<typeof vi.fn>;
+  };
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockConfig = {
+      getToolRegistry: vi.fn(),
+      getIdeMode: vi.fn().mockReturnValue(false),
+      getGeminiMdFileCount: vi.fn().mockReturnValue(5),
+    };
+    mockSettings = {
+      merged: {
+        security: {
+          auth: {
+            selectedType: 'oauth',
+          },
+        },
+      },
+    } as unknown as LoadedSettings;
+    mockIdeClient = {
+      connect: vi.fn(),
+    };
+    vi.mocked(IdeClient.getInstance).mockResolvedValue(
+      mockIdeClient as unknown as IdeClient,
+    );
+    vi.mocked(performInitialAuth).mockResolvedValue(null);
+    vi.mocked(validateTheme).mockReturnValue(null);
+  });
+
+  it('should initialize correctly in non-IDE mode', async () => {
+    const result = await initializeApp(
+      mockConfig as unknown as Config,
+      mockSettings,
+    );
+
+    expect(result).toEqual({
+      authError: null,
+      themeError: null,
+      shouldOpenAuthDialog: false,
+      geminiMdFileCount: 5,
+    });
+    expect(performInitialAuth).toHaveBeenCalledWith(mockConfig, 'oauth');
+    expect(validateTheme).toHaveBeenCalledWith(mockSettings);
+    expect(logCliConfiguration).toHaveBeenCalled();
+    expect(IdeClient.getInstance).not.toHaveBeenCalled();
+  });
+
+  it('should initialize correctly in IDE mode', async () => {
+    mockConfig.getIdeMode.mockReturnValue(true);
+    const result = await initializeApp(
+      mockConfig as unknown as Config,
+      mockSettings,
+    );
+
+    expect(result).toEqual({
+      authError: null,
+      themeError: null,
+      shouldOpenAuthDialog: false,
+      geminiMdFileCount: 5,
+    });
+    expect(IdeClient.getInstance).toHaveBeenCalled();
+    expect(mockIdeClient.connect).toHaveBeenCalled();
+    expect(logIdeConnection).toHaveBeenCalledWith(
+      mockConfig as unknown as Config,
+      expect.any(Object),
+    );
+  });
+
+  it('should handle auth error', async () => {
+    vi.mocked(performInitialAuth).mockResolvedValue('Auth failed');
+    const result = await initializeApp(
+      mockConfig as unknown as Config,
+      mockSettings,
+    );
+
+    expect(result.authError).toBe('Auth failed');
+    expect(result.shouldOpenAuthDialog).toBe(true);
+  });
+
+  it('should handle undefined auth type', async () => {
+    mockSettings.merged.security!.auth!.selectedType = undefined;
+    const result = await initializeApp(
+      mockConfig as unknown as Config,
+      mockSettings,
+    );
+
+    expect(result.shouldOpenAuthDialog).toBe(true);
+  });
+
+  it('should handle theme error', async () => {
+    vi.mocked(validateTheme).mockReturnValue('Theme not found');
+    const result = await initializeApp(
+      mockConfig as unknown as Config,
+      mockSettings,
+    );
+
+    expect(result.themeError).toBe('Theme not found');
+  });
+});