text: const {compose, decompose, schema} = require('./main');
  
  describe('[Unit] `main`', () => {
    it('should export a `compose` function', () => {
      expect(compose).toBeInstanceOf(Function);
    });
  
    it('should export a `decompose` function', () => {
      expect(decompose).toBeInstanceOf(Function);
    });
  
    it('should export a `schema` function', () => {
      expect(schema).toBeInstanceOf(Function);
    });
  });
  