api/utils/tokens.spec.js

const { getModelMaxTokens, matchModelName } = require('./tokens');

describe('getModelMaxTokens', () => {
  test('should return correct tokens for exact match', () => {
    expect(getModelMaxTokens('gpt-4-32k-0613')).toBe(32767);
  });

  test('should return correct tokens for partial match', () => {
    expect(getModelMaxTokens('gpt-4-32k-unknown')).toBe(32767);
  });

  test('should return correct tokens for partial match (OpenRouter)', () => {
    expect(getModelMaxTokens('openai/gpt-4-32k')).toBe(32767);
  });

  test('should return undefined for no match', () => {
    expect(getModelMaxTokens('unknown-model')).toBeUndefined();
  });

  test('should return correct tokens for another exact match', () => {
    expect(getModelMaxTokens('gpt-3.5-turbo-16k-0613')).toBe(15999);
  });

  test('should return correct tokens for another partial match', () => {
    expect(getModelMaxTokens('gpt-3.5-turbo-unknown')).toBe(4095);
  });

  test('should return undefined for undefined input', () => {
    expect(getModelMaxTokens(undefined)).toBeUndefined();
  });

  test('should return undefined for null input', () => {
    expect(getModelMaxTokens(null)).toBeUndefined();
  });

  test('should return undefined for number input', () => {
    expect(getModelMaxTokens(123)).toBeUndefined();
  });
});

describe('matchModelName', () => {
  it('should return the exact model name if it exists in maxTokensMap', () => {
    expect(matchModelName('gpt-4-32k-0613')).toBe('gpt-4-32k-0613');
  });

  it('should return the closest matching key for partial matches', () => {
    expect(matchModelName('gpt-4-32k-unknown')).toBe('gpt-4-32k');
  });

  it('should return the input model name if no match is found', () => {
    expect(matchModelName('unknown-model')).toBe('unknown-model');
  });

  it('should return undefined for non-string inputs', () => {
    expect(matchModelName(undefined)).toBeUndefined();
    expect(matchModelName(null)).toBeUndefined();
    expect(matchModelName(123)).toBeUndefined();
    expect(matchModelName({})).toBeUndefined();
  });
});