juplo.de Git - demos/kafka/chat/blob - src/test/java/de/juplo/kafka/chat/backend/AbstractHandoverIT.java

   1 package de.juplo.kafka.chat.backend;
   2
   3 import de.juplo.kafka.chat.backend.api.ChatRoomInfoTo;
   4 import de.juplo.kafka.chat.backend.api.MessageTo;
   5 import lombok.extern.slf4j.Slf4j;
   6 import org.junit.jupiter.api.BeforeEach;
   7 import org.junit.jupiter.api.Test;
   8 import org.springframework.http.HttpStatus;
   9 import org.springframework.http.MediaType;
  10 import org.springframework.web.reactive.function.client.WebClient;
  11 import org.testcontainers.junit.jupiter.Testcontainers;
  12 import pl.rzrz.assertj.reactor.Assertions;
  13 import reactor.core.publisher.Flux;
  14 import reactor.core.publisher.Mono;
  15
  16 import java.util.List;
  17 import java.util.concurrent.CompletableFuture;
  18
  19
  20 @Testcontainers
  21 @Slf4j
  22 public abstract class AbstractHandoverIT
  23 {
  24   static final int NUM_CHATROOMS = 23;
  25   static final int NUM_CLIENTS = 17;
  26
  27
  28   private final AbstractHandoverITContainers containers;
  29
  30
  31   AbstractHandoverIT(AbstractHandoverITContainers containers)
  32   {
  33     this.containers = containers;
  34   }
  35
  36
  37   @Test
  38   void test() throws InterruptedException
  39   {
  40     ChatRoomInfoTo[] chatRooms = Flux
  41         .range(0, NUM_CHATROOMS)
  42         .flatMap(i -> createChatRoom("room-" + i))
  43         .toStream()
  44         .toArray(size -> new ChatRoomInfoTo[size]);
  45
  46     int port = containers.haproxy.getMappedPort(8400);
  47
  48     CompletableFuture<Void>[] testWriterFutures = new CompletableFuture[NUM_CLIENTS];
  49     TestWriter[] testWriters = new TestWriter[NUM_CLIENTS];
  50     for (int i = 0; i < NUM_CLIENTS; i++)
  51     {
  52       TestWriter testWriter = new TestWriter(
  53           port,
  54           chatRooms[i % NUM_CHATROOMS],
  55           "user-" + i);
  56       testWriters[i] = testWriter;
  57       testWriterFutures[i] = testWriter
  58           .run()
  59           .toFuture();
  60     }
  61
  62     TestListener testListener = new TestListener(port, chatRooms);
  63     testListener
  64         .run()
  65         .subscribe(message -> log.info(
  66             "Received message: {}",
  67             message));
  68
  69     log.info("Sleeping for 3 seconds...");
  70     Thread.sleep(3000);
  71
  72     log.info("Starting Backend 2...");
  73     containers.backend2.start();
  74     log.info("Backend 2 started");
  75
  76     log.info("Sleeping for 3 seconds...");
  77     Thread.sleep(3000);
  78
  79     log.info("Starting Backend 3...");
  80     containers.backend3.start();
  81     log.info("Backend 3 started");
  82
  83     log.info("Sleeping for 3 seconds...");
  84     Thread.sleep(3000);
  85
  86     log.info("Shutting down writers...");
  87     for (int i = 0; i < NUM_CLIENTS; i++)
  88     {
  89       log.info("Shutting down writer {}", i);
  90       testWriters[i].running = false;
  91       testWriterFutures[i].join();
  92       log.info("Joined TestWriter {}", testWriters[i].user);
  93     }
  94
  95     // Yield the work, so that the last messages can be received
  96     Thread.sleep(500);
  97
  98     for (int i = 0; i < NUM_CLIENTS; i++)
  99     {
 100       TestWriter testWriter = testWriters[i];
 101       ChatRoomInfoTo chatRoom = testWriter.chatRoom;
 102       List<MessageTo> receivedMessages = testListener.receivedMessages.get(chatRoom.getId());
 103
 104       Assertions.assertThat(receivedMessages
 105           .stream()
 106           .filter(message -> message.getUser().equals(testWriter.user.getName()))
 107           ).containsExactlyElementsOf(testWriter.sentMessages);
 108     }
 109   }
 110
 111   Mono<ChatRoomInfoTo> createChatRoom(String name)
 112   {
 113     return webClient
 114         .post()
 115         .uri("/create")
 116         .contentType(MediaType.TEXT_PLAIN)
 117         .bodyValue(name)
 118         .accept(MediaType.APPLICATION_JSON)
 119         .exchangeToMono(response ->
 120         {
 121           if (response.statusCode().equals(HttpStatus.OK))
 122           {
 123             return response.bodyToMono(ChatRoomInfoTo.class);
 124           }
 125           else
 126           {
 127             return response.createError();
 128           }
 129         });
 130   }
 131
 132
 133   WebClient webClient;
 134
 135   @BeforeEach
 136   void setUp() throws Exception
 137   {
 138     containers.setUp();
 139
 140     Integer port = containers.haproxy.getMappedPort(8400);
 141     webClient = WebClient.create("http://localhost:" + port);
 142   }
 143 }