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// Copyright (c) 2013, 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
import 'dart:convert';
import 'package:expect/expect.dart';
// This test implements a new special interface that can be used to
// send data more efficiently between two converters.
abstract class MyChunkedIntSink extends ChunkedConversionSink<int> {
MyChunkedIntSink();
factory MyChunkedIntSink.from(sink) = IntAdapterSink;
factory MyChunkedIntSink.withCallback(callback) {
var sink = new ChunkedConversionSink.withCallback(callback);
return new MyChunkedIntSink.from(sink);
}
add(int i);
close();
// The special method.
void specialI(int i);
}
class IntAdapterSink extends MyChunkedIntSink {
final _sink;
IntAdapterSink(this._sink);
add(o) => _sink.add(o);
close() => _sink.close();
void specialI(int o) => add(o);
}
abstract class MyChunkedBoolSink extends ChunkedConversionSink<bool> {
MyChunkedBoolSink();
factory MyChunkedBoolSink.from(sink) = BoolAdapterSink;
factory MyChunkedBoolSink.withCallback(callback) {
var sink = new ChunkedConversionSink.withCallback(callback);
return new MyChunkedBoolSink.from(sink);
}
add(bool b);
close();
specialB(bool b);
}
class BoolAdapterSink extends MyChunkedBoolSink {
final _sink;
BoolAdapterSink(this._sink);
add(o) => _sink.add(o);
close() => _sink.close();
specialB(o) => add(o);
}
class IntBoolConverter1 extends Converter<int, bool> {
bool convert(int input) => input > 0;
startChunkedConversion(sink) {
if (sink is! MyChunkedBoolSink) sink = new MyChunkedBoolSink.from(sink);
return new IntBoolConverter1Sink(sink);
}
}
class BoolIntConverter1 extends Converter<bool, int> {
int convert(bool input) => input ? 1 : 0;
startChunkedConversion(sink) {
if (sink is! MyChunkedIntSink) sink = new MyChunkedIntSink.from(sink);
return new BoolIntConverter1Sink(sink);
}
}
int specialICounter = 0;
int specialBCounter = 0;
class IntBoolConverter1Sink extends MyChunkedIntSink {
var outSink;
IntBoolConverter1Sink(this.outSink);
add(int i) {
outSink.specialB(i > 0);
}
void specialI(int i) {
specialICounter++;
add(i);
}
close() => outSink.close();
}
class BoolIntConverter1Sink extends MyChunkedBoolSink {
var outSink;
BoolIntConverter1Sink(this.outSink);
add(bool b) {
outSink.specialI(b ? 1 : 0);
}
specialB(bool b) {
specialBCounter++;
add(b);
}
close() => outSink.close();
}
class IdentityConverter<T> extends Converter<T, T> {
T convert(T x) => x;
startChunkedConversion(sink) {
return new IdentitySink<T>(sink);
}
}
class IdentitySink<T> extends ChunkedConversionSink<T> {
final _sink;
IdentitySink(this._sink);
void add(T o) => _sink.add(o);
close() => _sink.close();
}
main() {
var intSink, boolSink, sink, sink2;
// Test int->bool converter individually.
Converter<int, bool> int2boolConverter = new IntBoolConverter1();
Expect.listEquals(
[true, false, true], [2, -2, 2].map(int2boolConverter.convert).toList());
var hasExecuted = false;
boolSink = new MyChunkedBoolSink.withCallback((value) {
hasExecuted = true;
Expect.listEquals([true, false, true], value);
});
intSink = int2boolConverter.startChunkedConversion(boolSink);
intSink.add(3);
intSink.specialI(-3);
intSink.add(3);
intSink.close();
Expect.isTrue(hasExecuted);
Expect.equals(1, specialICounter);
specialICounter = 0;
hasExecuted = false;
// Test bool->int converter individually.
Converter<bool, int> bool2intConverter = new BoolIntConverter1();
Expect.listEquals(
[1, 0, 1], [true, false, true].map(bool2intConverter.convert).toList());
hasExecuted = false;
intSink = new MyChunkedIntSink.withCallback((value) {
hasExecuted = true;
Expect.listEquals([1, 0, 1], value);
});
boolSink = bool2intConverter.startChunkedConversion(intSink);
boolSink.specialB(true);
boolSink.add(false);
boolSink.add(true);
boolSink.close();
Expect.isTrue(hasExecuted);
Expect.equals(1, specialBCounter);
specialBCounter = 0;
hasExecuted = false;
// Test identity converter individually.
var identityConverter = new IdentityConverter();
hasExecuted = false;
sink = new ChunkedConversionSink.withCallback((value) {
hasExecuted = true;
Expect.listEquals([1, 2, 3], value);
});
sink2 = identityConverter.startChunkedConversion(sink);
[1, 2, 3].forEach(sink2.add);
sink2.close();
Expect.isTrue(hasExecuted);
hasExecuted = false;
// Test fused converters.
Converter<int, int> fused = int2boolConverter.fuse(bool2intConverter);
Expect.listEquals([1, 0, 1], [2, -2, 2].map(fused.convert).toList());
hasExecuted = false;
Sink<int> intSink2 = new MyChunkedIntSink.withCallback((value) {
hasExecuted = true;
Expect.listEquals([1, 0, 1], value);
});
intSink = fused.startChunkedConversion(intSink2);
intSink.specialI(3);
intSink.add(-3);
intSink.add(3);
intSink.close();
Expect.isTrue(hasExecuted);
Expect.equals(3, specialBCounter);
specialBCounter = 0;
Expect.equals(1, specialICounter);
specialICounter = 0;
hasExecuted = false;
// With identity in front.
Converter<int, int> fused2 = new IdentityConverter<int>().fuse(fused);
hasExecuted = false;
intSink2 = new MyChunkedIntSink.withCallback((value) {
hasExecuted = true;
Expect.listEquals([1, 0, 1], value);
});
sink = fused2.startChunkedConversion(intSink2);
Expect.isFalse(sink is MyChunkedIntSink);
sink.add(3);
sink.add(-3);
sink.add(3);
sink.close();
Expect.isTrue(hasExecuted);
Expect.equals(3, specialBCounter);
specialBCounter = 0;
Expect.equals(0, specialICounter);
specialICounter = 0;
hasExecuted = false;
// With identity at the end.
fused2 = fused.fuse(new IdentityConverter());
hasExecuted = false;
sink = new ChunkedConversionSink<int>.withCallback((value) {
hasExecuted = true;
Expect.listEquals([1, 0, 1], value);
});
intSink = fused2.startChunkedConversion(sink);
Expect.isTrue(intSink is MyChunkedIntSink);
intSink.specialI(3);
intSink.add(-3);
intSink.specialI(3);
intSink.close();
Expect.isTrue(hasExecuted);
Expect.equals(3, specialBCounter);
specialBCounter = 0;
Expect.equals(2, specialICounter);
specialICounter = 0;
hasExecuted = false;
// With identity between the two converters.
fused =
int2boolConverter.fuse(new IdentityConverter()).fuse(bool2intConverter);
Expect.listEquals([1, 0, 1], [2, -2, 2].map(fused.convert).toList());
hasExecuted = false;
intSink2 = new MyChunkedIntSink.withCallback((value) {
hasExecuted = true;
Expect.listEquals([1, 0, 1], value);
});
intSink = fused.startChunkedConversion(intSink2);
intSink.specialI(3);
intSink.add(-3);
intSink.add(3);
intSink.close();
Expect.isTrue(hasExecuted);
Expect.equals(0, specialBCounter);
specialBCounter = 0;
Expect.equals(1, specialICounter);
specialICounter = 0;
hasExecuted = false;
}