testing.dart

import "dart:convert";
import "dart:io";

class base64encoder {
  void encode_text(String textInput) {
    List encodedText = utf8.encode(textInput);
    String theBaseStr = base64.encode(encodedText);
    print(theBaseStr);
  } 

  void decode_text(String encodedText) {
    String decodedText  = utf8.decode(base64.decode(encodedText.toString()));
    print(decodedText);
  }

  void encode_file(var rawFile) {
    List fileBytes = new File(rawFile).readAsBytesSync();
    print(fileBytes);
  }


}

void main () {
  base64encoder test = new base64encoder();
  var a = test.encode_text("ddddddddddddddddddddddddddddddddddddddddddddddddddddd");
  var b = test.decode_text(a);
  print(b);
  test.encode_file("directory to my file");
}