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// Copyright (c) 2014, 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.
// @dart = 2.9
// Test that the fused UTF-8/JSON decoder accepts a leading BOM.
library test;
import "package:expect/expect.dart";
import "dart:convert";
void main() {
for (var parse in [parseFuse, parseSequence, parseChunked]) {
// Sanity checks.
Expect.isTrue(parse('true'.codeUnits.toList()));
Expect.isFalse(parse('false'.codeUnits.toList()));
Expect.equals(123, parse('123'.codeUnits.toList()));
Expect.listEquals([42], parse('[42]'.codeUnits.toList()));
Expect.mapEquals({"x": 42}, parse('{"x":42}'.codeUnits.toList()));
// String (0x22 = ") with UTF-8 encoded Unicode characters.
Expect.equals(
"A\xff\u1234\u{65555}",
parse([
0x22,
0x41,
0xc3,
0xbf,
0xe1,
0x88,
0xb4,
0xf1,
0xa5,
0x95,
0x95,
0x22
]));
// BOM followed by true.
Expect.isTrue(parse([0xEF, 0xBB, 0xBF, 0x74, 0x72, 0x75, 0x65]));
}
// Do not accept BOM in non-UTF-8 decoder.
Expect.throws<FormatException>(
() => new JsonDecoder().convert("\xEF\xBB\xBFtrue"));
Expect.throws<FormatException>(() => new JsonDecoder().convert("\uFEFFtrue"));
// Only accept BOM first.
Expect.throws<FormatException>(
() => parseFuse(" \xEF\xBB\xBFtrue".codeUnits.toList()));
// Only accept BOM first.
Expect.throws<FormatException>(
() => parseFuse(" true\xEF\xBB\xBF".codeUnits.toList()));
Expect.throws<FormatException>(
() => parseFuse(" [\xEF\xBB\xBF]".codeUnits.toList()));
}
Object parseFuse(List<int> text) {
return new Utf8Decoder().fuse(new JsonDecoder()).convert(text);
}
Object parseSequence(List<int> text) {
return new JsonDecoder().convert(new Utf8Decoder().convert(text));
}
Object parseChunked(List<int> text) {
var result;
var sink = new Utf8Decoder().fuse(new JsonDecoder()).startChunkedConversion(
new ChunkedConversionSink.withCallback((List<Object> values) {
result = values[0];
}));
for (var i = 0; i < text.length; i++) {
sink.add([text[i]]);
}
sink.close();
return result;
}