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

   1 package de.juplo.kafka.chat.backend.persistence;
   2
   3 import com.fasterxml.jackson.databind.ObjectMapper;
   4 import com.fasterxml.jackson.databind.SerializationFeature;
   5 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
   6 import de.juplo.kafka.chat.backend.domain.ChatHome;
   7 import de.juplo.kafka.chat.backend.domain.ChatRoom;
   8 import de.juplo.kafka.chat.backend.domain.Message;
   9 import lombok.extern.slf4j.Slf4j;
  10 import org.junit.jupiter.api.BeforeEach;
  11 import org.junit.jupiter.api.Test;
  12 import reactor.core.publisher.Flux;
  13
  14 import java.io.IOException;
  15 import java.nio.file.Files;
  16 import java.nio.file.Path;
  17 import java.nio.file.Paths;
  18 import java.time.Clock;
  19 import java.util.List;
  20
  21 import static pl.rzrz.assertj.reactor.Assertions.*;
  22
  23
  24 @Slf4j
  25 public class LocalJsonFilesStorageStrategyIT
  26 {
  27   final static Path path = Paths.get("target","local-json-files");
  28
  29   InMemoryChatHomeService service;
  30   StorageStrategy storageStrategy;
  31   ChatHome chathome;
  32
  33   void start()
  34   {
  35     Clock clock = Clock.systemDefaultZone();
  36     service = new InMemoryChatHomeService(clock, 8);
  37     ObjectMapper mapper = new ObjectMapper();
  38     mapper.registerModule(new JavaTimeModule());
  39     mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
  40     storageStrategy = new LocalJsonFilesStorageStrategy(path, mapper, service);
  41     chathome = new ChatHome(service, storageStrategy.readChatrooms());
  42   }
  43
  44   void stop()
  45   {
  46     storageStrategy.writeChatrooms(Flux.fromStream(chathome.list()));
  47   }
  48
  49   @Test
  50   void testStoreAndRecreate()
  51   {
  52     start();
  53
  54     assertThat(chathome.list()).hasSize(0);
  55
  56     ChatRoom chatroom = chathome.createChatroom("FOO");
  57     Message m1 = chatroom.addMessage(1l,"Peter", "Hallo, ich heiße Peter!").block();
  58     Message m2 = chatroom.addMessage(1l, "Ute", "Ich bin Ute...").block();
  59     Message m3 = chatroom.addMessage(2l, "Peter", "Willst du mit mir gehen?").block();
  60     Message m4 = chatroom.addMessage(1l, "Klaus", "Ja? Nein? Vielleicht??").block();
  61
  62     assertThat(chathome.list()).containsExactlyElementsOf(List.of(chatroom));
  63     assertThat(chathome.getChatroom(chatroom.getId())).contains(chatroom);
  64     assertThat(chathome
  65         .getChatroom(chatroom.getId())
  66         .get()
  67         .getMessages()).emitsExactly(m1, m2, m3, m4);
  68
  69     stop();
  70     start();
  71
  72     assertThat(chathome.list()).containsExactlyElementsOf(List.of(chatroom));
  73     assertThat(chathome.getChatroom(chatroom.getId())).contains(chatroom);
  74     assertThat(chathome
  75         .getChatroom(chatroom.getId())
  76         .get()
  77         .getMessages()).emitsExactly(m1, m2, m3, m4);
  78   }
  79
  80   @BeforeEach
  81   void reset() throws Exception
  82   {
  83     if (Files.exists(path))
  84     {
  85       Files
  86           .walk(path)
  87           .forEach(file ->
  88           {
  89             try
  90             {
  91               if (!file.equals(path))
  92               {
  93                 log.debug("Deleting file {}", file);
  94                 Files.delete(file);
  95               }
  96             }
  97             catch (IOException e)
  98             {
  99               throw new RuntimeException(e);
 100             }
 101           });
 102       log.debug("Deleting data-directory {}", path);
 103       Files.delete(path);
 104     }
 105   }
 106 }