text: import SpreadsheetDateFormatPattern from "./SpreadsheetDateFormatPattern.js";
  import spreadsheetPatternTesting from "./SpreadsheetPatternTesting.js";
  
  spreadsheetPatternTesting(
      function(pattern) {
          return new SpreadsheetDateFormatPattern(pattern);
      },
      SpreadsheetDateFormatPattern.fromJson,
      SpreadsheetDateFormatPattern.parse
  );