128 lines
2.7 KiB
Dart
128 lines
2.7 KiB
Dart
import 'dart:async';
|
|
|
|
import 'package:angel3_reactivex/angel3_reactivex.dart';
|
|
import 'package:test/test.dart';
|
|
|
|
void main() {
|
|
test('Rx.defer', () async {
|
|
const value = 1;
|
|
|
|
final stream = _getDeferStream();
|
|
|
|
stream.listen(expectAsync1((actual) {
|
|
expect(actual, value);
|
|
}, count: 1));
|
|
});
|
|
|
|
test('Rx.defer.multiple.listeners', () async {
|
|
const value = 1;
|
|
|
|
final stream = _getBroadcastDeferStream();
|
|
|
|
stream.listen(expectAsync1((actual) {
|
|
expect(actual, value);
|
|
}, count: 1));
|
|
|
|
stream.listen(expectAsync1((actual) {
|
|
expect(actual, value);
|
|
}, count: 1));
|
|
});
|
|
|
|
test('Rx.defer.streamFactory.called', () async {
|
|
var count = 0;
|
|
|
|
Stream<int> streamFactory() {
|
|
++count;
|
|
return Stream.value(1);
|
|
}
|
|
|
|
var deferStream = DeferStream(
|
|
streamFactory,
|
|
reusable: false,
|
|
);
|
|
|
|
expect(count, 0);
|
|
|
|
deferStream.listen(
|
|
expectAsync1((_) {
|
|
expect(count, 1);
|
|
}),
|
|
);
|
|
});
|
|
|
|
test('Rx.defer.reusable', () async {
|
|
const value = 1;
|
|
|
|
final stream = Rx.defer(
|
|
() => Stream.fromFuture(
|
|
Future.delayed(
|
|
Duration(seconds: 1),
|
|
() => value,
|
|
),
|
|
),
|
|
reusable: true,
|
|
);
|
|
|
|
stream.listen(
|
|
expectAsync1(
|
|
(actual) => expect(actual, value),
|
|
count: 1,
|
|
),
|
|
);
|
|
stream.listen(
|
|
expectAsync1(
|
|
(actual) => expect(actual, value),
|
|
count: 1,
|
|
),
|
|
);
|
|
});
|
|
|
|
test('Rx.defer.single.subscription', () async {
|
|
final stream = _getDeferStream();
|
|
|
|
try {
|
|
stream.listen(null);
|
|
stream.listen(null);
|
|
expect(true, false);
|
|
} catch (e) {
|
|
expect(e, isStateError);
|
|
}
|
|
});
|
|
|
|
test('Rx.defer.error.shouldThrow.A', () async {
|
|
final streamWithError = Rx.defer(() => _getErroneousStream());
|
|
|
|
streamWithError.listen(null,
|
|
onError: expectAsync1((Exception e) {
|
|
expect(e, isException);
|
|
}, count: 1));
|
|
});
|
|
|
|
test('Rx.defer.error.shouldThrow.B', () {
|
|
final deferStream1 = Rx.defer<int>(() => throw Exception());
|
|
expect(
|
|
deferStream1,
|
|
emitsInOrder(<dynamic>[emitsError(isException), emitsDone]),
|
|
);
|
|
|
|
final deferStream2 = Rx.defer<int>(() => throw Exception(), reusable: true);
|
|
expect(
|
|
deferStream2,
|
|
emitsInOrder(<dynamic>[emitsError(isException), emitsDone]),
|
|
);
|
|
});
|
|
}
|
|
|
|
Stream<int> _getDeferStream() => Rx.defer(() => Stream.value(1));
|
|
|
|
Stream<int> _getBroadcastDeferStream() =>
|
|
Rx.defer(() => Stream.value(1)).asBroadcastStream();
|
|
|
|
Stream<int> _getErroneousStream() {
|
|
final controller = StreamController<int>();
|
|
|
|
controller.addError(Exception());
|
|
controller.close();
|
|
|
|
return controller.stream;
|
|
}
|