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Testing Reactive APIs

Pragya Keshap answered on February 18, 2023 Popularity 1/10 Helpfulness 1/10

answer Testing Reactive APIs

Testing Reactive APIs

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package com.learnreactivespring.fluxandmonoplayground;

import org.junit.Test;
import reactor.core.publisher.ConnectableFlux;
import reactor.core.publisher.Flux;

import java.time.Duration;

public class ColdAndHotPublisherTest {

    @Test
    public void coldPublisherTest() throws InterruptedException {

        Flux<String> stringFlux = Flux.just("A","B","C","D","E","F")
                .delayElements(Duration.ofSeconds(1));

        stringFlux.subscribe(s -> System.out.println("Subscriber 1 : " + s)); //emits the value from beginning

        Thread.sleep(2000);

        stringFlux.subscribe(s -> System.out.println("Subscriber 2 : " + s));//emits the value from beginning


        Thread.sleep(4000);
    }

    @Test
    public void hotPublisherTest() throws InterruptedException {

        Flux<String> stringFlux = Flux.just("A","B","C","D","E","F")
                .delayElements(Duration.ofSeconds(1));

        ConnectableFlux<String> connectableFlux = stringFlux.publish();
        connectableFlux.connect();
        connectableFlux.subscribe(s -> System.out.println("Subscriber 1 : " + s));
        Thread.sleep(3000);

        connectableFlux.subscribe(s -> System.out.println("Subscriber 2 : " + s)); // does not emit the values from beginning
        Thread.sleep(4000);

    }
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java reactive testing

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Contributed on Feb 18 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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