BAEL-5696: Refactors spring caching TTL tutorial (#12825)

Co-authored-by: Abdul <abdul.wahab@monese.com>

spring-caching-2/src/test/java/com/baeldung/caching/redis/ItemServiceCachingIntegrationTest.java

@@ -0,0 +1,84 @@
+package com.baeldung.caching.redis;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
+import org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration;
+import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import redis.embedded.RedisServer;
+
+import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+@Import({ CacheConfig.class, ItemService.class })
+@ExtendWith(SpringExtension.class)
+@ImportAutoConfiguration(classes = { CacheAutoConfiguration.class, RedisAutoConfiguration.class })
+@EnableCaching
+class ItemServiceCachingIntegrationTest {
+
+    private static final String AN_ID = "id-1";
+    private static final String A_DESCRIPTION = "an item";
+
+    @MockBean
+    private ItemRepository mockItemRepository;
+
+    @Autowired
+    private ItemService itemService;
+
+    @Autowired
+    private CacheManager cacheManager;
+
+    @Test
+    void givenRedisCaching_whenFindItemById_thenItemReturnedFromCache() {
+        Item anItem = new Item(AN_ID, A_DESCRIPTION);
+        given(mockItemRepository.findById(AN_ID))
+                .willReturn(Optional.of(anItem));
+
+        Item itemCacheMiss = itemService.getItemForId(AN_ID);
+        Item itemCacheHit = itemService.getItemForId(AN_ID);
+
+        assertThat(itemCacheMiss).isEqualTo(anItem);
+        assertThat(itemCacheHit).isEqualTo(anItem);
+
+        verify(mockItemRepository, times(1)).findById(AN_ID);
+        assertThat(itemFromCache()).isEqualTo(anItem);
+    }
+
+    private Object itemFromCache() {
+        return cacheManager.getCache("itemCache").get(AN_ID).get();
+    }
+
+    @TestConfiguration
+    static class EmbeddedRedisConfiguration {
+
+        private final RedisServer redisServer;
+
+        public EmbeddedRedisConfiguration() {
+            this.redisServer = new RedisServer();
+        }
+
+        @PostConstruct
+        public void startRedis() {
+            redisServer.start();
+        }
+
+        @PreDestroy
+        public void stopRedis() {
+            this.redisServer.stop();
+        }
+    }
+
+}

spring-caching-2/src/test/java/com/baeldung/caching/ttl/HotelControllerIntegrationTest.java

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+package com.baeldung.caching.ttl;
+
+import com.baeldung.caching.ttl.repository.HotelRepository;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.jdbc.Sql;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.hamcrest.Matchers.hasSize;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@ExtendWith(SpringExtension.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
+@AutoConfigureMockMvc
+@Sql(executionPhase = Sql.ExecutionPhase.BEFORE_TEST_METHOD, scripts = "classpath:data.sql")
+@SlowTest
+class HotelControllerIntegrationTest {
+    @Autowired private MockMvc mockMvc;
+    @Autowired private HotelRepository repository;
+
+    @Test
+    @DisplayName("When all hotels requested then request is successful")
+    void whenAllHotelsRequested_thenRequestIsSuccessful() throws Exception {
+        mockMvc
+                .perform(get("/hotel"))
+                .andExpect(status().isOk());
+    }
+
+    @Test
+    @DisplayName("When all hotels are requested then they correct number of hotels is returned")
+    void whenAllHotelsRequested_thenReturnAllHotels() throws Exception {
+        mockMvc
+                .perform(get("/hotel"))
+                .andExpect(jsonPath("$", hasSize((int) repository.findAll().stream().count())));
+    }
+}

spring-caching-2/src/test/java/com/baeldung/caching/ttl/SlowTest.java

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+package com.baeldung.caching.ttl;
+
+public @interface SlowTest {
+}

spring-caching-2/src/test/resources/application.properties

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+spring.datasource.url=jdbc:h2:mem:testdb;DB_CLOSE_ON_EXIT=FALSE
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=
+
+# Enabling H2 Console
+spring.h2.console.enabled=true
+spring.h2.console.path=/h2
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=false
+caching.spring.hotelListTTL=43200
+# Connection details
+#spring.redis.host=localhost
+#spring.redis.port=6379
+server.port=8000