1 package de.juplo.kafka.chat.backend;
3 import de.juplo.kafka.chat.backend.api.ChatRoomInfoTo;
4 import lombok.extern.slf4j.Slf4j;
5 import org.junit.jupiter.api.BeforeEach;
6 import org.junit.jupiter.api.Test;
7 import org.springframework.core.ParameterizedTypeReference;
8 import org.springframework.http.HttpStatus;
9 import org.springframework.http.MediaType;
10 import org.springframework.http.codec.ServerSentEvent;
11 import org.springframework.web.reactive.function.client.WebClient;
12 import org.testcontainers.junit.jupiter.Testcontainers;
13 import reactor.core.publisher.Flux;
14 import reactor.core.publisher.Mono;
16 import java.util.Arrays;
17 import java.util.concurrent.ExecutorService;
18 import java.util.concurrent.Executors;
19 import java.util.stream.IntStream;
24 public abstract class AbstractHandoverIT
26 static final ParameterizedTypeReference<ServerSentEvent<String>> SSE_TYPE = new ParameterizedTypeReference<>() {};
27 static final int NUM_CHATROOMS = 23;
28 static final int NUM_CLIENTS = 17;
31 private final AbstractHandoverITContainers containers;
32 private final ExecutorService executorService = Executors.newFixedThreadPool(NUM_CLIENTS);
35 AbstractHandoverIT(AbstractHandoverITContainers containers)
37 this.containers = containers;
42 void test() throws InterruptedException
44 ChatRoomInfoTo[] chatRooms = Flux
45 .range(0, NUM_CHATROOMS)
46 .flatMap(i -> createChatRoom("room-" + i))
48 .toArray(size -> new ChatRoomInfoTo[size]);
50 TestClient[] testClients = Flux
51 .fromStream(IntStream.range(0, NUM_CLIENTS).mapToObj(i -> "user-" + Integer.toString(i)))
52 .map(i -> new TestClient(
53 containers.haproxy.getMappedPort(8400),
56 .doOnNext(testClient -> executorService.execute(testClient))
58 .toArray(size -> new TestClient[size]);
64 .forEach(testClient -> testClient.running = false);
68 .flatMap(chatRoom ->receiveMessages(chatRoom).take(50))
69 .doOnNext(message -> log.info("message: {}", message))
74 Mono<ChatRoomInfoTo> createChatRoom(String name)
79 .contentType(MediaType.TEXT_PLAIN)
81 .accept(MediaType.APPLICATION_JSON)
82 .exchangeToMono(response ->
84 if (response.statusCode().equals(HttpStatus.OK))
86 return response.bodyToMono(ChatRoomInfoTo.class);
90 return response.createError();
95 Flux<ServerSentEvent<String>> receiveMessages(ChatRoomInfoTo chatRoom)
100 "/{chatRoomId}/listen",
102 .accept(MediaType.TEXT_EVENT_STREAM)
104 .bodyToFlux(SSE_TYPE);
111 void setUp() throws Exception
115 Integer port = containers.haproxy.getMappedPort(8400);
116 webClient = WebClient.create("http://localhost:" + port);