import { describe, expect, it } from 'vitest';
import {
  assertAppliedMigrationsPresent,
  assertMigrationChecksum,
  migrationChecksum,
} from '../../scripts/migration-checksum.mjs';

describe('migration checksums', () => {
  it('is stable for the exact migration bytes', () => {
    const content = Buffer.from('SELECT 1;\n', 'utf8');
    expect(migrationChecksum(content)).toBe(migrationChecksum(content));
  });

  it('rejects a modified applied migration', () => {
    const expected = migrationChecksum(Buffer.from('SELECT 1;\n', 'utf8'));
    const actual = migrationChecksum(Buffer.from('SELECT 2;\n', 'utf8'));
    expect(() => assertMigrationChecksum('0001', expected, actual)).toThrow(
      /Applied migration 0001 was modified/,
    );
  });

  it('rejects an applied migration removed from the repository', () => {
    expect(() => assertAppliedMigrationsPresent(['0001', '0002'], ['0002'])).toThrow(
      /Applied migration 0001 is missing/,
    );
  });
});