Revert "Add data-URI support class to dart:core (next to Uri)."

tests/corelib/data_uri_test.dart

-// Copyright (c) 2015, 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";
-import "dart:convert";
-import "dart:typed_data";
-
-main() {
-  testMediaType();
-
-  testRoundTrip("");
-  testRoundTrip("a");
-  testRoundTrip("ab");
-  testRoundTrip("abc");
-  testRoundTrip("abcd");
-  testRoundTrip("Content with special%25 characters: # ? = % # ? = %");
-  testRoundTrip("blåbærgrød", UTF8);
-  testRoundTrip("blåbærgrød", LATIN1);
-
-  testUtf8Encoding("\u1000\uffff");
-  testBytes();
-  testInvalidCharacters();
-  testErrors();
-}
-
-void testMediaType() {
-  for (var mimeType in ["", "text/plain", "text/javascript"]) {
-    for (var charset in ["", ";charset=US-ASCII", ";charset=UTF-8"]) {
-      for (var base64 in ["", ";base64"]) {
-        bool isBase64 = base64.isNotEmpty;
-        var text = "data:$mimeType$charset$base64,";
-        var uri = UriData.parse(text);
-
-        String expectedCharset =
-            charset.isEmpty ? "US-ASCII" : charset.substring(9);
-        String expectedMimeType =
-            mimeType.isEmpty ? "text/plain" : mimeType;
-
-        Expect.equals(text, "$uri");
-        Expect.equals(expectedMimeType, uri.mimeType);
-        Expect.equals(expectedCharset, uri.charset);
-        Expect.equals(isBase64, uri.isBase64);
-      }
-    }
-  }
-}
-
-void testRoundTrip(String content, [Encoding encoding]) {
-  UriData dataUri =
-      new UriData.fromString(content, encoding: encoding);
-  Expect.isFalse(dataUri.isBase64);
-  Uri uri = dataUri.uri;
-  expectUriEquals(new Uri.dataFromString(content, encoding: encoding), uri);
-
-  if (encoding != null) {
-    UriData dataUriParams = new UriData.fromString(
-        content, parameters: {"charset" : encoding.name});
-    Expect.equals("$dataUri", "$dataUriParams");
-  }
-
-  Expect.equals(encoding ?? ASCII, Encoding.getByName(dataUri.charset));
-  Expect.equals(content, dataUri.contentAsString(encoding: encoding));
-  Expect.equals(content, dataUri.contentAsString());
-  Expect.equals(content, (encoding ?? ASCII).decode(dataUri.contentAsBytes()));
-
-  uri = dataUri.uri;
-  Expect.equals(uri.toString(), dataUri.toString());
-  Expect.equals(dataUri.toString(), new UriData.fromUri(uri).toString());
-
-  dataUri = new UriData.fromBytes(content.codeUnits);
-  Expect.listEquals(content.codeUnits, dataUri.contentAsBytes());
-  Expect.equals(content, dataUri.contentAsString(encoding: LATIN1));
-
-  uri = dataUri.uri;
-  Expect.equals(uri.toString(), dataUri.toString());
-  Expect.equals(dataUri.toString(), new UriData.fromUri(uri).toString());
-  // Check that the URI is properly normalized.
-  expectUriEquals(uri, Uri.parse("$uri"));
-}
-
-void testUtf8Encoding(String content) {
-  UriData uri = new UriData.fromString(content, encoding: UTF8);
-  Expect.equals(content, uri.contentAsString(encoding: UTF8));
-  Expect.listEquals(UTF8.encode(content), uri.contentAsBytes());
-}
-
-void testInvalidCharacters() {
-  // SPACE, CTL and tspecial, plus '%' and '#' (URI gen-delim)
-  // This contains all ASCII character that are not valid in attribute/value
-  // parts.
-  var invalid =
-    '\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x7f'
-    ' ()<>@,;:"/[]?=%#\x80\u{1000}\u{10000}';
-  var invalidNoSlash = invalid.replaceAll('/', '');
-  var dataUri = new UriData.fromString(
-      invalid,
-      encoding: UTF8,
-      mimeType: "$invalidNoSlash/$invalidNoSlash",
-      parameters: {invalid: invalid});
-
-  Expect.equals(invalid, dataUri.contentAsString());
-  Expect.equals("$invalidNoSlash/$invalidNoSlash", dataUri.mimeType);
-  Expect.equals(invalid, dataUri.parameters[invalid]);
-
-  var uri = dataUri.uri;
-  Expect.equals("$uri", "$dataUri");
-  expectUriEquals(uri, Uri.parse("$uri"));  // Check that it's canonicalized.
-  Expect.equals("$dataUri", new UriData.fromUri(uri).toString());
-}
-
-void testBytes() {
-  void testList(List<int> list) {
-    var dataUri = new UriData.fromBytes(list);
-    Expect.equals("application/octet-stream", dataUri.mimeType);
-    Expect.isTrue(dataUri.isBase64);
-    Expect.listEquals(list, dataUri.contentAsBytes());
-
-    dataUri = new UriData.fromBytes(list, percentEncoded: true);
-    Expect.equals("application/octet-stream", dataUri.mimeType);
-    Expect.isFalse(dataUri.isBase64);
-    Expect.listEquals(list, dataUri.contentAsBytes());
-
-    var string = new String.fromCharCodes(list);
-
-    dataUri = new UriData.fromString(string, encoding: LATIN1);
-    Expect.equals("text/plain", dataUri.mimeType);
-    Expect.isFalse(dataUri.isBase64);
-    Expect.listEquals(list, dataUri.contentAsBytes());
-
-    dataUri =
-        new UriData.fromString(string, encoding: LATIN1, base64: true);
-    Expect.equals("text/plain", dataUri.mimeType);
-    Expect.isTrue(dataUri.isBase64);
-    Expect.listEquals(list, dataUri.contentAsBytes());
-  }
-
-  void testLists(List<int> list) {
-    testList(list);
-    for (int i = 0; i < 27; i++) {
-      testList(list.sublist(i, i + i));  // All lengths from 0 to 27.
-    }
-  }
-
-  var bytes = new Uint8List(512);
-  for (int i = 0; i < bytes.length; i++) {
-    bytes[i] = i;
-  }
-  testLists(bytes);
-  testLists(new List.from(bytes));
-  testLists(new List.unmodifiable(bytes));
-}
-
-bool badArgument(e) => e is ArgumentError;
-bool badFormat(e) => e is FormatException;
-
-void testErrors() {
-  // Invalid constructor parameters.
-  Expect.throws(() { new UriData.fromBytes([], mimeType: "noslash"); },
-                badArgument);
-  Expect.throws(() { new UriData.fromBytes([257]); },
-                badArgument);
-  Expect.throws(() { new UriData.fromBytes([-1]); },
-                badArgument);
-  Expect.throws(() { new UriData.fromBytes([0x100000000]); },
-                badArgument);
-  Expect.throws(() { new UriData.fromString("", mimeType: "noslash"); },
-                badArgument);
-
-  Expect.throws(() { new Uri.dataFromBytes([], mimeType: "noslash"); },
-                badArgument);
-  Expect.throws(() { new Uri.dataFromBytes([257]); },
-                badArgument);
-  Expect.throws(() { new Uri.dataFromBytes([-1]); },
-                badArgument);
-  Expect.throws(() { new Uri.dataFromBytes([0x100000000]); },
-                badArgument);
-  Expect.throws(() { new Uri.dataFromString("", mimeType: "noslash"); },
-                badArgument);
-
-  // Empty parameters allowed, not an error.
-  var uri = new UriData.fromString("", mimeType: "", parameters: {});
-  Expect.equals("data:,", "$uri");
-  // Empty parameter key or value is an error.
-  Expect.throws(() =>  new UriData.fromString("", parameters: {"": "X"}),
-                badArgument);
-  Expect.throws(() =>  new UriData.fromString("", parameters: {"X": ""}),
-                badArgument);
-
-  // Not recognizing charset is an error.
-  uri = UriData.parse("data:;charset=arglebargle,X");
-  Expect.throws(() {
-    uri.contentAsString();
-  });
-  // Doesn't throw if we specify the encoding.
-  Expect.equals("X", uri.contentAsString(encoding: ASCII));
-
-  // Parse format.
-  Expect.throws(() { UriData.parse("notdata:,");}, badFormat);
-  Expect.throws(() { UriData.parse("text/plain,noscheme");}, badFormat);
-  Expect.throws(() { UriData.parse("data:noseparator");}, badFormat);
-  Expect.throws(() { UriData.parse("data:noslash,text");}, badFormat);
-  Expect.throws(() { UriData.parse("data:type/sub;noequals,text");},
-                badFormat);
-  Expect.throws(() { UriData.parse("data:type/sub;knocomma=");},
-                badFormat);
-  Expect.throws(() { UriData.parse("data:type/sub;k=v;nocomma");},
-                badFormat);
-  Expect.throws(() { UriData.parse("data:type/sub;k=nocomma");},
-                badFormat);
-  Expect.throws(() { UriData.parse("data:type/sub;k=v;base64");},
-                badFormat);
-
-  // Invalid base64 format (only detected when decodeing).
-  for (var a = 0; a <= 4; a++) {
-    for (var p = 0; p <= 4; p++) {
-      // Base-64 encoding must have length divisible by four and no more
-      // than two padding characters at the end.
-      if (p < 3 && (a + p) % 4 == 0) continue;
-      uri = UriData.parse("data:;base64," + "A" * a + "=" * p);
-      Expect.throws(uri.contentAsBytes, badFormat);
-    }
-  }
-  // Invalid base64 encoding: padding not at end.
-  uri = UriData.parse("data:;base64,AA=A");
-  Expect.throws(uri.contentAsBytes, badFormat);
-  uri = UriData.parse("data:;base64,A=AA");
-  Expect.throws(uri.contentAsBytes, badFormat);
-  uri = UriData.parse("data:;base64,=AAA");
-  Expect.throws(uri.contentAsBytes, badFormat);
-  uri = UriData.parse("data:;base64,A==A");
-  Expect.throws(uri.contentAsBytes, badFormat);
-  uri = UriData.parse("data:;base64,==AA");
-  Expect.throws(uri.contentAsBytes, badFormat);
-  uri = UriData.parse("data:;base64,===A");
-  Expect.throws(uri.contentAsBytes, badFormat);
-}
-
-/// Checks that two [Uri]s are exactly the same.
-expectUriEquals(Uri expect, Uri actual) {
-  Expect.equals(expect.scheme, actual.scheme, "scheme");
-  Expect.equals(expect.hasAuthority, actual.hasAuthority, "hasAuthority");
-  Expect.equals(expect.userInfo, actual.userInfo, "userInfo");
-  Expect.equals(expect.host, actual.host, "host");
-  Expect.equals(expect.hasPort, actual.hasPort, "hasPort");
-  Expect.equals(expect.port, actual.port, "port");
-  Expect.equals(expect.port, actual.port, "port");
-  Expect.equals(expect.hasQuery, actual.hasQuery, "hasQuery");
-  Expect.equals(expect.query, actual.query, "query");
-  Expect.equals(expect.hasFragment, actual.hasFragment, "hasFragment");
-  Expect.equals(expect.fragment, actual.fragment, "fragment");
-}