feat(test): Increase test coverage across CLI and Core packages (#1089)

packages/core/src/telemetry/telemetry.test.ts

@@ -0,0 +1,72 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import {
+  initializeTelemetry,
+  shutdownTelemetry,
+  isTelemetrySdkInitialized,
+} from './sdk.js';
+import { Config } from '../config/config.js';
+import { NodeSDK } from '@opentelemetry/sdk-node';
+import * as loggers from './loggers.js';
+
+vi.mock('@opentelemetry/sdk-node');
+vi.mock('../config/config.js');
+vi.mock('./loggers.js');
+
+describe('telemetry', () => {
+  let mockConfig: Config;
+  let mockNodeSdk: NodeSDK;
+
+  beforeEach(() => {
+    vi.resetAllMocks();
+
+    mockConfig = new Config({
+      sessionId: 'test-session-id',
+      contentGeneratorConfig: {
+        model: 'test-model',
+      },
+      targetDir: '/test/dir',
+      debugMode: false,
+      cwd: '/test/dir',
+    });
+    vi.spyOn(mockConfig, 'getTelemetryEnabled').mockReturnValue(true);
+    vi.spyOn(mockConfig, 'getTelemetryOtlpEndpoint').mockReturnValue(
+      'http://localhost:4317',
+    );
+    vi.spyOn(mockConfig, 'getSessionId').mockReturnValue('test-session-id');
+    vi.spyOn(loggers, 'logCliConfiguration').mockImplementation(() => {});
+
+    mockNodeSdk = {
+      start: vi.fn(),
+      shutdown: vi.fn().mockResolvedValue(undefined),
+    } as unknown as NodeSDK;
+    vi.mocked(NodeSDK).mockImplementation(() => mockNodeSdk);
+  });
+
+  afterEach(async () => {
+    // Ensure we shut down telemetry even if a test fails.
+    if (isTelemetrySdkInitialized()) {
+      await shutdownTelemetry();
+    }
+  });
+
+  it('should initialize the telemetry service', () => {
+    initializeTelemetry(mockConfig);
+
+    expect(NodeSDK).toHaveBeenCalled();
+    expect(mockNodeSdk.start).toHaveBeenCalled();
+    expect(loggers.logCliConfiguration).toHaveBeenCalledWith(mockConfig);
+  });
+
+  it('should shutdown the telemetry service', async () => {
+    initializeTelemetry(mockConfig);
+    await shutdownTelemetry();
+
+    expect(mockNodeSdk.shutdown).toHaveBeenCalled();
+  });
+});