Replace old utf8 decoder with new one.

tests/lib/convert/utf82_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.
+
+library utf8_test;
+import "package:expect/expect.dart";
+import 'dart:convert';
+import 'dart:codec';
+
+String decode(List<int> bytes) => new Utf8Decoder().convert(bytes);
+String decodeAllowMalformed(List<int> bytes) {
+  return new Utf8Decoder(allowMalformed: true).convert(bytes);
+}
+
+String decode2(List<int> bytes) => UTF8.decode(bytes);
+String decodeAllowMalformed2(List<int> bytes) {
+  return UTF8.decode(bytes, allowMalformed: true);
+}
+
+String decode3(List<int> bytes) => new Utf8Codec().decode(bytes);
+String decodeAllowMalformed3(List<int> bytes) {
+  return new Utf8Codec(allowMalformed: true).decode(bytes);
+}
+
+String decode4(List<int> bytes) => new Utf8Codec().decoder.convert(bytes);
+String decodeAllowMalformed4(List<int> bytes) {
+  return new Utf8Codec(allowMalformed: true).decoder.convert(bytes);
+}
+
+final TESTS = [
+  // Unfinished UTF-8 sequences.
+  [ 0xc3 ],
+  [ 0xE2, 0x82 ],
+  [ 0xF0, 0xA4, 0xAD ],
+  // Overlong encoding of euro-sign.
+  [ 0xF0, 0x82, 0x82, 0xAC ],
+  // Other overlong/unfinished sequences.
+  [ 0xC0 ],
+  [ 0xC1 ],
+  [ 0xF5 ],
+  [ 0xF6 ],
+  [ 0xF7 ],
+  [ 0xF8 ],
+  [ 0xF9 ],
+  [ 0xFA ],
+  [ 0xFB ],
+  [ 0xFC ],
+  [ 0xFD ],
+  [ 0xFE ],
+  [ 0xFF ],
+  [ 0xC0, 0x80 ],
+  [ 0xC1, 0x80 ],
+  // Outside valid range.
+  [ 0xF4, 0xBF, 0xBF, 0xBF ]];
+
+final TESTS2 = [
+  // Test that 0xC0|1, 0x80 does not eat the next character.
+  [[ 0xC0, 0x80, 0x61 ], "Xa" ],
+  [[ 0xC1, 0x80, 0x61 ], "Xa" ],
+  // 0xF5 .. 0xFF never appear in valid UTF-8 sequences.
+  [[ 0xF5, 0x80 ], "XX" ],
+  [[ 0xF6, 0x80 ], "XX" ],
+  [[ 0xF7, 0x80 ], "XX" ],
+  [[ 0xF8, 0x80 ], "XX" ],
+  [[ 0xF9, 0x80 ], "XX" ],
+  [[ 0xFA, 0x80 ], "XX" ],
+  [[ 0xFB, 0x80 ], "XX" ],
+  [[ 0xFC, 0x80 ], "XX" ],
+  [[ 0xFD, 0x80 ], "XX" ],
+  [[ 0xFE, 0x80 ], "XX" ],
+  [[ 0xFF, 0x80 ], "XX" ],
+  [[ 0xF5, 0x80, 0x61 ], "XXa" ],
+  [[ 0xF6, 0x80, 0x61 ], "XXa" ],
+  [[ 0xF7, 0x80, 0x61 ], "XXa" ],
+  [[ 0xF8, 0x80, 0x61 ], "XXa" ],
+  [[ 0xF9, 0x80, 0x61 ], "XXa" ],
+  [[ 0xFA, 0x80, 0x61 ], "XXa" ],
+  [[ 0xFB, 0x80, 0x61 ], "XXa" ],
+  [[ 0xFC, 0x80, 0x61 ], "XXa" ],
+  [[ 0xFD, 0x80, 0x61 ], "XXa" ],
+  [[ 0xFE, 0x80, 0x61 ], "XXa" ],
+  [[ 0xFF, 0x80, 0x61 ], "XXa" ],
+  // Characters outside the valid range.
+  [[ 0xF5, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xF6, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xF7, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xF8, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xF9, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xFA, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xFB, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xFC, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xFD, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xFE, 0x80, 0x80, 0x61 ], "XXXa" ],
+  [[ 0xFF, 0x80, 0x80, 0x61 ], "XXXa" ]];
+
+main() {
+  var allTests = TESTS.expand((test) {
+    // Pairs of test and expected string output when malformed strings are
+    // allowed. Replacement character: U+FFFD
+    return [[ test, "\u{FFFD}" ],
+            [ new List.from([0x61])..addAll(test), "a\u{FFFD}" ],
+            [ new List.from([0x61])..addAll(test)..add(0x61), "a\u{FFFD}a" ],
+            [ new List.from(test)..add(0x61), "\u{FFFD}a" ],
+            [ new List.from(test)..addAll(test), "\u{FFFD}\u{FFFD}" ],
+            [ new List.from(test)..add(0x61)..addAll(test),
+              "\u{FFFD}a\u{FFFD}" ],
+            [ new List.from([0xc3, 0xa5])..addAll(test), "å\u{FFFD}" ],
+            [ new List.from([0xc3, 0xa5])..addAll(test)..addAll([0xc3, 0xa5]),
+              "å\u{FFFD}å" ],
+            [ new List.from(test)..addAll([0xc3, 0xa5]), "\u{FFFD}å" ],
+            [ new List.from(test)..addAll([0xc3, 0xa5])..addAll(test),
+              "\u{FFFD}å\u{FFFD}" ]];
+  });
+
+  var allTests2 = TESTS2.map((test) {
+    // Pairs of test and expected string output when malformed strings are
+    // allowed. Replacement character: U+FFFD
+    String expected = test[1].replaceAll("X", "\u{FFFD}");
+    return [test[0], expected];
+  });
+
+  for (var test in []..addAll(allTests)..addAll(allTests2)) {
+    List<int> bytes = test[0];
+    Expect.throws(() => decode(bytes), (e) => e is FormatException);
+    Expect.throws(() => decode2(bytes), (e) => e is FormatException);
+    Expect.throws(() => decode3(bytes), (e) => e is FormatException);
+    Expect.throws(() => decode4(bytes), (e) => e is FormatException);
+
+    String expected = test[1];
+    Expect.equals(expected, decodeAllowMalformed(bytes));
+    Expect.equals(expected, decodeAllowMalformed2(bytes));
+    Expect.equals(expected, decodeAllowMalformed3(bytes));
+    Expect.equals(expected, decodeAllowMalformed4(bytes));
+  }
+}