LibTest/core/Uri/Uri.dataFromString_A01_t04.dart

// Copyright (c) 2017, 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.

/// @assertion Uri.dataFromString(
///  String content, {
///  String mimeType,
///  Encoding encoding,
///  Map<String, String> parameters,
///  bool base64: false
///  })
/// Creates a data: URI containing the content string.
///
/// Converts the content to a bytes using encoding or the charset specified in
/// parameters (defaulting to US-ASCII if not specified or unrecognized), then
/// encodes the bytes into the resulting data URI.
///
/// Defaults to encoding using percent-encoding (any non-ASCII or non-URI-valid
/// bytes is replaced by a percent encoding). If base64 is true, the bytes are
/// instead encoded using BASE64.
///
/// If encoding is not provided and parameters has a charset entry, that name is
/// looked up using Encoding.getByName, and if the lookup returns an encoding,
/// that encoding is used to convert content to bytes. If providing both an
/// encoding and a charset parameter, they should agree, otherwise decoding
/// won't be able to use the charset parameter to determine the encoding.
///
/// If mimeType and/or parameters are supplied, they are added to the created
/// URI. If any of these contain characters that are not allowed in the data URI,
/// the character is percent-escaped. If the character is non-ASCII, it is first
/// UTF-8 encoded and then the bytes are percent encoded. An omitted mimeType in
/// a data URI means text/plain, just as an omitted charset parameter defaults to
/// meaning US-ASCII.
/// @description Checks that this constructor creates an expected Uri. Test
/// parameters parameter specified
/// @author sgrekhov@unipro.ru

import "dart:convert";
import "../../../Utils/expect.dart";
import "UriDataEncoder.lib.dart";

check(String content, Map<String, String> parameters) {
  Uri uri = new Uri.dataFromString(content, parameters: parameters);

  Expect.equals(encodeString(content), uri.data?.contentText);
  Expect.equals("text/plain", uri.data?.mimeType);
  Expect.mapEquals(parameters, uri.data?.parameters);
  Expect.equals("data:" + map2query(parameters) + "," + encodeString(content),
      uri.data.toString());

  Expect.equals("data", uri.scheme);
  Expect.equals("", uri.userInfo);
  Expect.equals("", uri.host);
  Expect.equals(0, uri.port);
  Expect.equals("", uri.fragment);
}

String map2query(Map<String, String> map) {
  StringBuffer sb = new StringBuffer();
  Iterator it = map.keys.iterator;
  while (it.moveNext()) {
    sb.write(";" + encodeString(it.current) + "=" +
        encodeString(map[it.current]!, encoding: Encoding.getByName("utf-8")));
  }
  return sb.toString();
}

main() {
  check("Some data", {"a": "b", "c": "d"});
  check("", {});
  check(reserved, {});
  check(unreserved, {"a": "b c"});
  check("Some data", {"a 1": "b"});
  check("Some data", {"a": "Кириллица прекрасна!"});
}