promptfoo/test/redteam/util.test.ts

import { fetchWithCache } from '../../src/cache';
import {
  extractGoalFromPrompt,
  getShortPluginId,
  isBasicRefusal,
  isEmptyResponse,
  normalizeApostrophes,
  removePrefix,
} from '../../src/redteam/util';

jest.mock('../../src/cache');

describe('removePrefix', () => {
  it('should remove a simple prefix', () => {
    expect(removePrefix('Prompt: Hello world', 'Prompt')).toBe('Hello world');
  });

  it('should be case insensitive', () => {
    expect(removePrefix('PROMPT: Hello world', 'prompt')).toBe('Hello world');
  });

  it('should remove asterisks from the prefix', () => {
    expect(removePrefix('**Prompt:** Hello world', 'Prompt')).toBe('Hello world');
  });

  it('should handle multiple asterisks', () => {
    expect(removePrefix('***Prompt:*** Hello world', 'Prompt')).toBe('Hello world');
  });

  it('should return the same string if prefix is not found', () => {
    expect(removePrefix('Hello world', 'Prefix')).toBe('Hello world');
  });

  it('should handle empty strings', () => {
    expect(removePrefix('', 'Prefix')).toBe('');
  });

  it('should handle prefix that is the entire string', () => {
    expect(removePrefix('Prompt:', 'Prompt')).toBe('');
  });
});

describe('normalizeApostrophes', () => {
  it('should normalize different types of apostrophes', () => {
    expect(normalizeApostrophes("I'm")).toBe("I'm");
    expect(normalizeApostrophes('I′m')).toBe("I'm");
    expect(normalizeApostrophes("I'm")).toBe("I'm");
    expect(normalizeApostrophes("I'm")).toBe("I'm");
  });

  it('should handle strings without apostrophes', () => {
    expect(normalizeApostrophes('Hello world')).toBe('Hello world');
  });
});

describe('isEmptyResponse', () => {
  it('should return true for empty responses', () => {
    expect(isEmptyResponse('')).toBe(true);
    expect(isEmptyResponse('   ')).toBe(true);
    expect(isEmptyResponse('{}')).toBe(true);
    expect(isEmptyResponse('  {}  ')).toBe(true);
  });

  it('should return false for non-empty responses', () => {
    expect(isEmptyResponse('Hello')).toBe(false);
    expect(isEmptyResponse('{"key": "value"}')).toBe(false);
  });
});

describe('isBasicRefusal', () => {
  it('should detect refusal prefixes', () => {
    expect(isBasicRefusal('I am sorry, I cannot help with that')).toBe(true);
    expect(isBasicRefusal("I'm not able to assist with this request")).toBe(true);
    expect(isBasicRefusal('I apologize, but I cannot do that')).toBe(true);
  });

  it('should detect refusal substrings', () => {
    expect(isBasicRefusal('As an AI language model, I cannot help with that')).toBe(true);
    expect(isBasicRefusal('I cannot assist with that request')).toBe(true);
    expect(isBasicRefusal('That would not be appropriate')).toBe(true);
  });

  it('should normalize apostrophes in responses', () => {
    expect(isBasicRefusal("I′m sorry, I can't help")).toBe(true);
    expect(isBasicRefusal("I'm unable to assist")).toBe(true);
  });

  it('should handle case insensitivity', () => {
    expect(isBasicRefusal('I AM SORRY, I CANNOT HELP')).toBe(true);
    expect(isBasicRefusal('as an ai language model')).toBe(true);
  });

  it('should return false for non-refusal responses', () => {
    expect(isBasicRefusal('I will help you with that')).toBe(false);
    expect(isBasicRefusal('Here is the information you requested')).toBe(false);
    expect(isBasicRefusal('The answer is 42')).toBe(false);
  });
});

describe('getShortPluginId', () => {
  it('should remove promptfoo:redteam: prefix', () => {
    expect(getShortPluginId('promptfoo:redteam:test')).toBe('test');
  });

  it('should return original if no prefix', () => {
    expect(getShortPluginId('test')).toBe('test');
  });
});

describe('extractGoalFromPrompt', () => {
  beforeEach(() => {
    jest.resetAllMocks();
  });

  it('should successfully extract goal', async () => {
    jest.mocked(fetchWithCache).mockResolvedValue({
      cached: false,
      status: 200,
      statusText: 'OK',
      headers: {},
      data: { intent: 'test goal' },
      deleteFromCache: async () => {},
    });

    const result = await extractGoalFromPrompt('test prompt', 'test purpose');
    expect(result).toBe('test goal');
  });

  it('should return null on HTTP error', async () => {
    jest.mocked(fetchWithCache).mockResolvedValue({
      cached: false,
      status: 500,
      statusText: 'Internal Server Error',
      headers: {},
      data: {},
      deleteFromCache: async () => {},
    });

    const result = await extractGoalFromPrompt('test prompt', 'test purpose');
    expect(result).toBeNull();
  });

  it('should return null when no intent returned', async () => {
    jest.mocked(fetchWithCache).mockResolvedValue({
      cached: false,
      status: 200,
      statusText: 'OK',
      headers: {},
      data: {},
      deleteFromCache: async () => {},
    });

    const result = await extractGoalFromPrompt('test prompt', 'test purpose');
    expect(result).toBeNull();
  });

  it('should return null when API throws error', async () => {
    jest.mocked(fetchWithCache).mockRejectedValue(new Error('API error'));

    const result = await extractGoalFromPrompt('test prompt', 'test purpose');
    expect(result).toBeNull();
  });

  it('should handle empty prompt and purpose', async () => {
    jest.mocked(fetchWithCache).mockResolvedValue({
      cached: false,
      status: 200,
      statusText: 'OK',
      headers: {},
      data: { intent: 'empty goal' },
      deleteFromCache: async () => {},
    });

    const result = await extractGoalFromPrompt('', '');
    expect(result).toBe('empty goal');
  });

  it('should include plugin context when pluginId is provided', async () => {
    jest.mocked(fetchWithCache).mockResolvedValue({
      cached: false,
      status: 200,
      statusText: 'OK',
      headers: {},
      data: { intent: 'plugin-specific goal' },
      deleteFromCache: async () => {},
    });

    const result = await extractGoalFromPrompt(
      'innocent prompt',
      'test purpose',
      'indirect-prompt-injection',
    );
    expect(result).toBe('plugin-specific goal');

    // Verify that the API was called with plugin context
    expect(fetchWithCache).toHaveBeenCalledWith(
      expect.any(String),
      expect.objectContaining({
        body: expect.stringContaining('pluginContext'),
      }),
      expect.any(Number),
    );
  });

  it('should skip remote call when remote generation is disabled', async () => {
    // Preserve original environment setting
    const originalValue = process.env.PROMPTFOO_DISABLE_REDTEAM_REMOTE_GENERATION;
    process.env.PROMPTFOO_DISABLE_REDTEAM_REMOTE_GENERATION = 'true';

    const result = await extractGoalFromPrompt('test prompt', 'test purpose');

    expect(result).toBeNull();
    expect(fetchWithCache).not.toHaveBeenCalled();

    // Cleanup: restore or delete the env var to avoid leaking into other tests
    if (originalValue === undefined) {
      delete process.env.PROMPTFOO_DISABLE_REDTEAM_REMOTE_GENERATION;
    } else {
      process.env.PROMPTFOO_DISABLE_REDTEAM_REMOTE_GENERATION = originalValue;
    }
  });
});