text: // Copyright (C) 2022 Igalia, S.L. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  esid: sec-temporal.plainyearmonth.protoype.tostring
  description: never value for calendarName option
  features: [Temporal]
  ---*/
  
  const calendar = {
    toString() { return "custom"; }
  };
  const yearmonth1 = new Temporal.PlainYearMonth(2000, 5);
  const yearmonth2 = new Temporal.PlainYearMonth(2000, 5, calendar);
  
  [
    [yearmonth1, "2000-05"],
    [yearmonth2, "2000-05-01"],
  ].forEach(([yearmonth, expected]) => {
    const result = yearmonth.toString({ calendarName: "never" });
    assert.sameValue(result, expected, "calendarName is never");
  });
  