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| 1 | +package io.rsocket.loadbalance; |
| 2 | + |
| 3 | +import static java.util.Collections.singletonList; |
| 4 | +import static org.assertj.core.api.Assertions.assertThat; |
| 5 | +import static org.mockito.Mockito.verify; |
| 6 | +import static org.mockito.Mockito.verifyNoMoreInteractions; |
| 7 | +import static org.mockito.Mockito.when; |
| 8 | + |
| 9 | +import io.rsocket.Payload; |
| 10 | +import io.rsocket.RSocket; |
| 11 | +import io.rsocket.core.RSocketClient; |
| 12 | +import io.rsocket.core.RSocketConnector; |
| 13 | +import io.rsocket.transport.ClientTransport; |
| 14 | +import io.rsocket.util.DefaultPayload; |
| 15 | +import java.time.Duration; |
| 16 | +import java.util.concurrent.atomic.AtomicInteger; |
| 17 | +import org.junit.jupiter.api.Test; |
| 18 | +import org.junit.jupiter.api.extension.ExtendWith; |
| 19 | +import org.mockito.Mock; |
| 20 | +import org.mockito.junit.jupiter.MockitoExtension; |
| 21 | +import org.reactivestreams.Publisher; |
| 22 | +import reactor.core.publisher.Flux; |
| 23 | +import reactor.core.publisher.Mono; |
| 24 | +import reactor.test.StepVerifier; |
| 25 | + |
| 26 | +@ExtendWith(MockitoExtension.class) |
| 27 | +class LoadbalanceRSocketClientTest { |
| 28 | + |
| 29 | + @Mock private ClientTransport clientTransport; |
| 30 | + @Mock private RSocketConnector rSocketConnector; |
| 31 | + |
| 32 | + public static final Duration SHORT_DURATION = Duration.ofMillis(25); |
| 33 | + public static final Duration LONG_DURATION = Duration.ofMillis(75); |
| 34 | + |
| 35 | + private static final Publisher<Payload> SOURCE = |
| 36 | + Flux.interval(SHORT_DURATION).map(String::valueOf).map(DefaultPayload::create); |
| 37 | + |
| 38 | + private static final Mono<RSocket> PROGRESSING_HANDLER = |
| 39 | + Mono.just( |
| 40 | + new RSocket() { |
| 41 | + private final AtomicInteger i = new AtomicInteger(); |
| 42 | + |
| 43 | + @Override |
| 44 | + public Flux<Payload> requestChannel(Publisher<Payload> payloads) { |
| 45 | + return Flux.from(payloads) |
| 46 | + .delayElements(SHORT_DURATION) |
| 47 | + .map(Payload::getDataUtf8) |
| 48 | + .map(DefaultPayload::create) |
| 49 | + .take(i.incrementAndGet()); |
| 50 | + } |
| 51 | + }); |
| 52 | + |
| 53 | + @Test |
| 54 | + void testChannelReconnection() { |
| 55 | + when(rSocketConnector.connect(clientTransport)).thenReturn(PROGRESSING_HANDLER); |
| 56 | + |
| 57 | + RSocketClient client = |
| 58 | + LoadbalanceRSocketClient.create( |
| 59 | + rSocketConnector, |
| 60 | + Mono.just(singletonList(LoadbalanceTarget.from("key", clientTransport)))); |
| 61 | + |
| 62 | + Publisher<String> result = |
| 63 | + client |
| 64 | + .requestChannel(SOURCE) |
| 65 | + .repeatWhen(longFlux -> longFlux.delayElements(LONG_DURATION).take(5)) |
| 66 | + .map(Payload::getDataUtf8) |
| 67 | + .log(); |
| 68 | + |
| 69 | + StepVerifier.create(result) |
| 70 | + .expectSubscription() |
| 71 | + .assertNext(s -> assertThat(s).isEqualTo("0")) |
| 72 | + .assertNext(s -> assertThat(s).isEqualTo("0")) |
| 73 | + .assertNext(s -> assertThat(s).isEqualTo("1")) |
| 74 | + .assertNext(s -> assertThat(s).isEqualTo("0")) |
| 75 | + .assertNext(s -> assertThat(s).isEqualTo("1")) |
| 76 | + .assertNext(s -> assertThat(s).isEqualTo("2")) |
| 77 | + .assertNext(s -> assertThat(s).isEqualTo("0")) |
| 78 | + .assertNext(s -> assertThat(s).isEqualTo("1")) |
| 79 | + .assertNext(s -> assertThat(s).isEqualTo("2")) |
| 80 | + .assertNext(s -> assertThat(s).isEqualTo("3")) |
| 81 | + .assertNext(s -> assertThat(s).isEqualTo("0")) |
| 82 | + .assertNext(s -> assertThat(s).isEqualTo("1")) |
| 83 | + .assertNext(s -> assertThat(s).isEqualTo("2")) |
| 84 | + .assertNext(s -> assertThat(s).isEqualTo("3")) |
| 85 | + .assertNext(s -> assertThat(s).isEqualTo("4")) |
| 86 | + .verifyComplete(); |
| 87 | + |
| 88 | + verify(rSocketConnector).connect(clientTransport); |
| 89 | + verifyNoMoreInteractions(rSocketConnector, clientTransport); |
| 90 | + } |
| 91 | +} |
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