import { describe, it, expect } from 'vitest';
import { FUNCTIONS, BUILTIN_SIGNATURES } from '../functions';

describe('BUILTIN_SIGNATURES', () => {
  it('has exactly one entry per registered built-in function, names matching', () => {
    const registered = Object.keys(FUNCTIONS).sort();
    const signatures = BUILTIN_SIGNATURES.map((s) => s.name).sort();
    // A future new built-in without a matching hint entry fails loudly here
    // instead of just silently being missing from the autocomplete dropdown.
    expect(signatures).toEqual(registered);
  });

  it('every hint actually starts with its own name', () => {
    for (const s of BUILTIN_SIGNATURES) {
      expect(s.hint.startsWith(s.name)).toBe(true);
    }
  });
});