svoid test_weekday_after_ymdSlashes() {
  assertEqualsVerbose("2019/03/26", weekday_after_ymdSlashes(parseEnglishWeekday("tuesday"), "2019/03/21"));
  assertEqualsVerbose("2019/03/26", weekday_after_ymdSlashes(parseEnglishWeekday("tuesday"), "2019/03/19"));
  assertEqualsVerbose("2019/03/27", weekday_after_ymdSlashes(parseEnglishWeekday("wednesday"), "2019/03/26"));
}