Use dart:crypto's Base64 methods in dart:io.

tests/standalone/crypto/base64_test.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import "package:expect/expect.dart";
-
-part "../../../sdk/lib/io/base64.dart";
-
-void main() {
-  String line;
-  String expected;
-
-  line =
-      "Man is distinguished, not only by his reason, but by this singular "
-      "passion from other animals, which is a lust of the mind, that by a "
-      "perseverance of delight in the continued and indefatigable generation "
-      "of knowledge, exceeds the short vehemence of any carnal pleasure.";
-  expected =
-      "TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbm"
-      "x5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz\r\n"
-      "IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlci"
-      "BhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg\r\n"
-      "dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcm"
-      "FuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu\r\n"
-      "dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYX"
-      "Rpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo\r\n"
-      "ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm"
-      "5hbCBwbGVhc3VyZS4=";
-  Expect.equals(expected, _Base64._encode(line.codeUnits));
-  Expect.listEquals(line.codeUnits, _Base64._decode(expected));
-
-  line = "Simple string";
-  expected = "U2ltcGxlIHN0cmluZw==";
-  Expect.equals(expected, _Base64._encode(line.codeUnits));
-  Expect.listEquals(line.codeUnits, _Base64._decode(expected));
-
-  for (int i = 0; i < 256; i++) {
-    List<int> x = [i];
-    Expect.listEquals(x, _Base64._decode(_Base64._encode(x)));
-  }
-
-  for (int i = 0; i < 255; i++) {
-    List<int> x = [i, i + 1];
-    Expect.listEquals(x, _Base64._decode(_Base64._encode(x)));
-  }
-
-  for (int i = 0; i < 254; i++) {
-    List<int> x = [i, i + 1, i + 2];
-    Expect.listEquals(x, _Base64._decode(_Base64._encode(x)));
-  }
-
-  for (int i = 0; i < 253; i++) {
-    List<int> x = [i, i + 1, i + 2, i + 3];
-    Expect.listEquals(x, _Base64._decode(_Base64._encode(x)));
-  }
-
-  for (int i = 0; i < 252; i++) {
-    List<int> x = [i, i + 1, i + 2, i + 3, i + 4];
-    Expect.listEquals(x, _Base64._decode(_Base64._encode(x)));
-  }
-
-  for (int i = 0; i < 251; i++) {
-    List<int> x = [i, i + 1, i + 2, i + 3, i + 4, i + 5];
-    Expect.listEquals(x, _Base64._decode(_Base64._encode(x)));
-  }
-
-  for (int i = 0; i < 250; i++) {
-    List<int> x = [i, i + 1, i + 2, i + 3, i + 4, i + 5, i + 6];
-    Expect.listEquals(x, _Base64._decode(_Base64._encode(x)));
-  }
-}