How to use the @aurelia/validation.RegexRule function in @aurelia/validation

it(`RegexRule#execute validates ${value} to be ${isValid}`, function () {
      const sut = new RegexRule((void 0)!, /foo/);
      assert.equal(sut.execute(value), isValid);
    })
  );

      getRule: (sut: IValidationMessageProvider) => new RegexRule(sut, /foo/, 'email'),
    },

      getRule: (sut: IValidationMessageProvider) => new RegexRule(sut, /foo/),
    },