Testing Tools and Frameworks for Agentic AI Systems

describe('EmailSenderTool', () => {
  test('sends email with valid parameters', async () => {
    const tool = new EmailSenderTool();
    const result = await tool.execute({
      to: 'test@example.com',
      subject: 'Test',
      body: 'Hello'
    });
    
    expect(result.success).toBe(true);
    expect(result.data.message_id).toBeDefined();
  });
  
  test('fails gracefully with invalid email', async () => {
    const tool = new EmailSenderTool();
    await expect(tool.execute({
      to: 'invalid-email',
      subject: 'Test'
    })).rejects.toThrow('Invalid email format');
  });
});

// Mock external email service
jest.mock('./emailService', () => ({
  send: jest.fn().mockResolvedValue({
    id: 'msg_123',
    status: 'sent'
  })
}));

// Test uses mock, not real API
test('agent uses email tool correctly', async () => {
  const agent = new Agent({ tools: [emailTool] });
  await agent.execute('Send email to john@example.com');
  
  expect(emailService.send).toHaveBeenCalledWith({
    to: 'john@example.com',
    ...
  });
});