63 lines
2 KiB
Dart
63 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.mergeWith', () 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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const expected = [2, 1];
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var count = 0;
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delayedStream.mergeWith([immediateStream]).listen(expectAsync1((result) {
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expect(result, expected[count++]);
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}, count: expected.length));
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});
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test('Rx.mergeWith accidental broadcast', () async {
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final controller = StreamController<int>();
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final stream = controller.stream.mergeWith([Stream<int>.empty()]);
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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.mergeWith 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 = [2, 1, emitsDone];
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final concatenatedStream = delayedStream.mergeWith([immediateStream]);
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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.mergeWith 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 = [2, 1, emitsDone];
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final concatenatedStream = delayedStream.mergeWith([immediateStream]);
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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.mergeWith 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 = delayedStream.mergeWith([immediateStream]);
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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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