64 lines
2 KiB
Dart
64 lines
2 KiB
Dart
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import 'dart:async';
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import 'package:angel3_reactivex/angel3_reactivex.dart';
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import 'package:test/test.dart';
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void main() {
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test('Rx.zipWith', () async {
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Stream<int>.value(1)
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.zipWith(Stream<int>.value(2), (int one, int two) => one + two)
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.listen(expectAsync1((int result) {
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expect(result, 3);
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}, count: 1));
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});
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test('Rx.zipWith accidental broadcast', () async {
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final controller = StreamController<int>();
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final stream =
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controller.stream.zipWith(Stream<int>.empty(), (_, dynamic __) => true);
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stream.listen(null);
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expect(() => stream.listen(null), throwsStateError);
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controller.add(1);
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});
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test('Rx.zipWith on single stream should stay single ', () async {
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final delayedStream = Rx.timer(1, Duration(milliseconds: 10));
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final immediateStream = Stream.value(2);
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final expected = [3, emitsDone];
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final concatenatedStream =
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delayedStream.zipWith(immediateStream, (a, int b) => a + b);
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expect(concatenatedStream.isBroadcast, isFalse);
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expect(concatenatedStream, emitsInOrder(expected));
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});
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test('Rx.zipWith on broadcast stream should stay broadcast ', () async {
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final delayedStream =
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Rx.timer(1, Duration(milliseconds: 10)).asBroadcastStream();
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final immediateStream = Stream.value(2);
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final expected = [3, emitsDone];
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final concatenatedStream =
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delayedStream.zipWith(immediateStream, (a, int b) => a + b);
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expect(concatenatedStream.isBroadcast, isTrue);
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expect(concatenatedStream, emitsInOrder(expected));
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});
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test('Rx.zipWith multiple subscriptions on single ', () async {
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final delayedStream = Rx.timer(1, Duration(milliseconds: 10));
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final immediateStream = Stream.value(2);
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final concatenatedStream =
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delayedStream.zipWith(immediateStream, (a, int b) => a + b);
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expect(() => concatenatedStream.listen(null), returnsNormally);
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expect(() => concatenatedStream.listen(null),
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throwsA(TypeMatcher<StateError>()));
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});
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}
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