79 lines
1.8 KiB
Dart
79 lines
1.8 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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import '../../utils.dart';
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void main() {
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test('Rx.pairwise', () async {
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const expectedOutput = [
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[1, 2],
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[2, 3],
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[3, 4]
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];
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var count = 0;
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final stream = Rx.range(1, 4).pairwise();
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stream.listen(
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expectAsync1((result) {
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// test to see if the combined output matches
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expect(result, expectedOutput[count++]);
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}, count: expectedOutput.length),
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onError: expectAsync2((Object e, StackTrace s) {}, count: 0),
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onDone: expectAsync0(() {}, count: 1),
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);
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});
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test('Rx.pairwise.empty', () {
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expect(Stream<int>.empty().pairwise(), emitsDone);
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});
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test('Rx.pairwise.single', () {
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expect(Stream.value(1).pairwise(), emitsDone);
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});
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test('Rx.pairwise.compatible', () {
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expect(
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Stream.fromIterable([1, 2]).pairwise(),
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isA<Stream<Iterable<int>>>(),
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);
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Stream<Iterable<int>> s = Stream.fromIterable([1, 2]).pairwise();
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expect(
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s,
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emitsInOrder(<Object>[
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[1, 2],
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emitsDone
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]),
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);
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});
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test('Rx.pairwise.asBroadcastStream', () async {
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final stream =
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Stream.fromIterable(const [1, 2, 3, 4]).asBroadcastStream().pairwise();
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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.pairwise.error.shouldThrow.onError', () async {
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final streamWithError = Stream<void>.error(Exception()).pairwise();
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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.pairwise.nullable', () {
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nullableTest<Iterable<String?>>(
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(s) => s.pairwise(),
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);
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});
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}
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