120 lines
3.3 KiB
Dart
120 lines
3.3 KiB
Dart
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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import '../utils.dart';
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Stream<int> _getStream() {
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final controller = StreamController<int>();
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Timer(const Duration(milliseconds: 100), () => controller.add(1));
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Timer(const Duration(milliseconds: 200), () => controller.add(2));
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Timer(const Duration(milliseconds: 300), () => controller.add(3));
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Timer(const Duration(milliseconds: 400), () {
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controller.add(4);
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controller.close();
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});
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return controller.stream;
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}
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Stream<int> _getOtherStream() {
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final controller = StreamController<int>();
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Timer(const Duration(milliseconds: 250), () {
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controller.add(1);
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controller.close();
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});
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return controller.stream;
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}
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void main() {
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test('Rx.takeUntil', () async {
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const expectedOutput = [1, 2];
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var count = 0;
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_getStream().takeUntil(_getOtherStream()).listen(expectAsync1((result) {
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expect(expectedOutput[count++], result);
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}, count: expectedOutput.length));
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});
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test('Rx.takeUntil.shouldClose', () async {
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_getStream()
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.takeUntil(Stream<void>.empty())
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.listen(null, onDone: expectAsync0(() => expect(true, isTrue)));
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});
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test('Rx.takeUntil.reusable', () async {
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final transformer = TakeUntilStreamTransformer<int, int>(
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_getOtherStream().asBroadcastStream());
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const expectedOutput = [1, 2];
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var countA = 0, countB = 0;
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_getStream().transform(transformer).listen(expectAsync1((result) {
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expect(expectedOutput[countA++], result);
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}, count: expectedOutput.length));
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_getStream().transform(transformer).listen(expectAsync1((result) {
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expect(expectedOutput[countB++], result);
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}, count: expectedOutput.length));
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});
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test('Rx.takeUntil.asBroadcastStream', () async {
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final stream = _getStream()
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.asBroadcastStream()
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.takeUntil(_getOtherStream().asBroadcastStream());
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// listen twice on same stream
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stream.listen(null);
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stream.listen(null);
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// code should reach here
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await expectLater(true, true);
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});
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test('Rx.takeUntil.error.shouldThrowA', () async {
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final streamWithError =
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Stream<void>.error(Exception()).takeUntil(_getOtherStream());
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streamWithError.listen(null,
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onError: expectAsync2((Exception e, StackTrace s) {
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expect(e, isException);
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}));
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});
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test('Rx.takeUntil.pause.resume', () async {
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late StreamSubscription<int> subscription;
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const expectedOutput = [1, 2];
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var count = 0;
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subscription =
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_getStream().takeUntil(_getOtherStream()).listen(expectAsync1((result) {
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expect(result, expectedOutput[count++]);
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if (count == expectedOutput.length) {
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subscription.cancel();
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}
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}, count: expectedOutput.length));
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subscription.pause();
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subscription.resume();
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});
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test('Rx.takeUntil accidental broadcast', () async {
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final controller = StreamController<int>();
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final stream = controller.stream.takeUntil(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.takeUntil.nullable', () {
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nullableTest<String?>(
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(s) => s.takeUntil(Stream<void>.empty()),
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);
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});
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}
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