feat: Implement non-interactive mode for CLI (#675)

packages/cli/src/nonInteractiveCli.test.ts

@@ -0,0 +1,224 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { runNonInteractive } from './nonInteractiveCli.js';
+import { Config, GeminiClient, ToolRegistry } from '@gemini-code/core';
+import { GenerateContentResponse, Part, FunctionCall } from '@google/genai';
+
+// Mock dependencies
+vi.mock('@gemini-code/core', async () => {
+  const actualCore =
+    await vi.importActual<typeof import('@gemini-code/core')>(
+      '@gemini-code/core',
+    );
+  return {
+    ...actualCore,
+    GeminiClient: vi.fn(),
+    ToolRegistry: vi.fn(),
+    executeToolCall: vi.fn(),
+  };
+});
+
+describe('runNonInteractive', () => {
+  let mockConfig: Config;
+  let mockGeminiClient: GeminiClient;
+  let mockToolRegistry: ToolRegistry;
+  let mockChat: {
+    sendMessageStream: ReturnType<typeof vi.fn>;
+  };
+  let mockProcessStdoutWrite: ReturnType<typeof vi.fn>;
+  let mockProcessExit: ReturnType<typeof vi.fn>;
+
+  beforeEach(() => {
+    mockChat = {
+      sendMessageStream: vi.fn(),
+    };
+    mockGeminiClient = {
+      startChat: vi.fn().mockResolvedValue(mockChat),
+    } as unknown as GeminiClient;
+    mockToolRegistry = {
+      discoverTools: vi.fn().mockResolvedValue(undefined),
+      getFunctionDeclarations: vi.fn().mockReturnValue([]),
+      getTool: vi.fn(),
+    } as unknown as ToolRegistry;
+
+    vi.mocked(GeminiClient).mockImplementation(() => mockGeminiClient);
+    vi.mocked(ToolRegistry).mockImplementation(() => mockToolRegistry);
+
+    mockConfig = {
+      getToolRegistry: vi.fn().mockReturnValue(mockToolRegistry),
+    } as unknown as Config;
+
+    mockProcessStdoutWrite = vi.fn().mockImplementation(() => true);
+    process.stdout.write = mockProcessStdoutWrite as any; // Use any to bypass strict signature matching for mock
+    mockProcessExit = vi
+      .fn()
+      .mockImplementation((_code?: number) => undefined as never);
+    process.exit = mockProcessExit as any; // Use any for process.exit mock
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    // Restore original process methods if they were globally patched
+    // This might require storing the original methods before patching them in beforeEach
+  });
+
+  it('should process input and write text output', async () => {
+    const inputStream = (async function* () {
+      yield {
+        candidates: [{ content: { parts: [{ text: 'Hello' }] } }],
+      } as GenerateContentResponse;
+      yield {
+        candidates: [{ content: { parts: [{ text: ' World' }] } }],
+      } as GenerateContentResponse;
+    })();
+    mockChat.sendMessageStream.mockResolvedValue(inputStream);
+
+    await runNonInteractive(mockConfig, 'Test input');
+
+    expect(mockGeminiClient.startChat).toHaveBeenCalled();
+    expect(mockToolRegistry.discoverTools).toHaveBeenCalled();
+    expect(mockChat.sendMessageStream).toHaveBeenCalledWith({
+      message: [{ text: 'Test input' }],
+      config: {
+        abortSignal: expect.any(AbortSignal),
+        tools: [{ functionDeclarations: [] }],
+      },
+    });
+    expect(mockProcessStdoutWrite).toHaveBeenCalledWith('Hello');
+    expect(mockProcessStdoutWrite).toHaveBeenCalledWith(' World');
+    expect(mockProcessStdoutWrite).toHaveBeenCalledWith('\n');
+  });
+
+  it('should handle a single tool call and respond', async () => {
+    const functionCall: FunctionCall = {
+      id: 'fc1',
+      name: 'testTool',
+      args: { p: 'v' },
+    };
+    const toolResponsePart: Part = {
+      functionResponse: {
+        name: 'testTool',
+        id: 'fc1',
+        response: { result: 'tool success' },
+      },
+    };
+
+    const { executeToolCall: mockCoreExecuteToolCall } = await import(
+      '@gemini-code/core'
+    );
+    vi.mocked(mockCoreExecuteToolCall).mockResolvedValue({
+      callId: 'fc1',
+      responseParts: [toolResponsePart],
+      resultDisplay: 'Tool success display',
+      error: undefined,
+    });
+
+    const stream1 = (async function* () {
+      yield { functionCalls: [functionCall] } as GenerateContentResponse;
+    })();
+    const stream2 = (async function* () {
+      yield {
+        candidates: [{ content: { parts: [{ text: 'Final answer' }] } }],
+      } as GenerateContentResponse;
+    })();
+    mockChat.sendMessageStream
+      .mockResolvedValueOnce(stream1)
+      .mockResolvedValueOnce(stream2);
+
+    await runNonInteractive(mockConfig, 'Use a tool');
+
+    expect(mockChat.sendMessageStream).toHaveBeenCalledTimes(2);
+    expect(mockCoreExecuteToolCall).toHaveBeenCalledWith(
+      expect.objectContaining({ callId: 'fc1', name: 'testTool' }),
+      mockToolRegistry,
+      expect.any(AbortSignal),
+    );
+    expect(mockChat.sendMessageStream).toHaveBeenLastCalledWith(
+      expect.objectContaining({
+        message: [toolResponsePart],
+      }),
+    );
+    expect(mockProcessStdoutWrite).toHaveBeenCalledWith('Final answer');
+  });
+
+  it('should handle error during tool execution', async () => {
+    const functionCall: FunctionCall = {
+      id: 'fcError',
+      name: 'errorTool',
+      args: {},
+    };
+    const errorResponsePart: Part = {
+      functionResponse: {
+        name: 'errorTool',
+        id: 'fcError',
+        response: { error: 'Tool failed' },
+      },
+    };
+
+    const { executeToolCall: mockCoreExecuteToolCall } = await import(
+      '@gemini-code/core'
+    );
+    vi.mocked(mockCoreExecuteToolCall).mockResolvedValue({
+      callId: 'fcError',
+      responseParts: [errorResponsePart],
+      resultDisplay: 'Tool execution failed badly',
+      error: new Error('Tool failed'),
+    });
+
+    const stream1 = (async function* () {
+      yield { functionCalls: [functionCall] } as GenerateContentResponse;
+    })();
+
+    const stream2 = (async function* () {
+      yield {
+        candidates: [
+          { content: { parts: [{ text: 'Could not complete request.' }] } },
+        ],
+      } as GenerateContentResponse;
+    })();
+    mockChat.sendMessageStream
+      .mockResolvedValueOnce(stream1)
+      .mockResolvedValueOnce(stream2);
+    const consoleErrorSpy = vi
+      .spyOn(console, 'error')
+      .mockImplementation(() => {});
+
+    await runNonInteractive(mockConfig, 'Trigger tool error');
+
+    expect(mockCoreExecuteToolCall).toHaveBeenCalled();
+    expect(consoleErrorSpy).toHaveBeenCalledWith(
+      'Error executing tool errorTool: Tool execution failed badly',
+    );
+    expect(mockChat.sendMessageStream).toHaveBeenLastCalledWith(
+      expect.objectContaining({
+        message: [errorResponsePart],
+      }),
+    );
+    expect(mockProcessStdoutWrite).toHaveBeenCalledWith(
+      'Could not complete request.',
+    );
+    consoleErrorSpy.mockRestore();
+  });
+
+  it('should exit with error if sendMessageStream throws initially', async () => {
+    const apiError = new Error('API connection failed');
+    mockChat.sendMessageStream.mockRejectedValue(apiError);
+    const consoleErrorSpy = vi
+      .spyOn(console, 'error')
+      .mockImplementation(() => {});
+
+    await runNonInteractive(mockConfig, 'Initial fail');
+
+    expect(consoleErrorSpy).toHaveBeenCalledWith(
+      'Error processing input:',
+      apiError,
+    );
+    consoleErrorSpy.mockRestore();
+  });
+});