Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

spring-boot/src/test/java/com/baeldung/annotation/servletcomponentscan/SpringBootWithServletComponentIntegrationTest.java

@@ -0,0 +1,61 @@
+package com.baeldung.annotation.servletcomponentscan;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+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.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.servlet.FilterRegistration;
+import javax.servlet.ServletContext;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = SpringBootAnnotatedApp.class)
+public class SpringBootWithServletComponentIntegrationTest {
+
+    @Autowired
+    private ServletContext servletContext;
+
+    @Test
+    public void givenServletContext_whenAccessAttrs_thenFoundAttrsPutInServletListner() {
+        assertNotNull(servletContext);
+        assertNotNull(servletContext.getAttribute("servlet-context-attr"));
+        assertEquals("test", servletContext.getAttribute("servlet-context-attr"));
+    }
+
+    @Test
+    public void givenServletContext_whenCheckHelloFilterMappings_thenCorrect() {
+        assertNotNull(servletContext);
+        FilterRegistration filterRegistration = servletContext.getFilterRegistration("hello filter");
+
+        assertNotNull(filterRegistration);
+        assertTrue(filterRegistration.getServletNameMappings().contains("echo servlet"));
+    }
+
+    @Autowired
+    private TestRestTemplate restTemplate;
+
+    @Test
+    public void givenServletFilter_whenGetHello_thenRequestFiltered() {
+        ResponseEntity<String> responseEntity = this.restTemplate.getForEntity("/hello", String.class);
+        assertEquals(HttpStatus.OK, responseEntity.getStatusCode());
+        assertEquals("filtering hello", responseEntity.getBody());
+    }
+
+    @Test
+    public void givenFilterAndServlet_whenPostEcho_thenEchoFiltered() {
+        ResponseEntity<String> responseEntity = this.restTemplate.postForEntity("/echo", "echo", String.class);
+        assertEquals(HttpStatus.OK, responseEntity.getStatusCode());
+        assertEquals("filtering echo", responseEntity.getBody());
+    }
+
+}

spring-boot/src/test/java/com/baeldung/annotation/servletcomponentscan/SpringBootWithoutServletComponentIntegrationTest.java

@@ -0,0 +1,49 @@
+package com.baeldung.annotation.servletcomponentscan;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import javax.servlet.FilterRegistration;
+import javax.servlet.ServletContext;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = SpringBootPlainApp.class)
+public class SpringBootWithoutServletComponentIntegrationTest {
+
+    @Autowired
+    private ServletContext servletContext;
+
+    @Autowired
+    private TestRestTemplate restTemplate;
+
+    @Test
+    public void givenServletContext_whenAccessAttrs_thenNotFound() {
+        assertNull(servletContext.getAttribute("servlet-context-attr"));
+    }
+
+    @Test
+    public void givenServletFilter_whenGetHello_thenEndpointNotFound() {
+        ResponseEntity<String> responseEntity = this.restTemplate.getForEntity("/hello", String.class);
+        assertEquals(HttpStatus.NOT_FOUND, responseEntity.getStatusCode());
+    }
+
+    @Test
+    public void givenServletContext_whenCheckFilterMappings_thenEmpty() {
+        assertNotNull(servletContext);
+        FilterRegistration filterRegistration = servletContext.getFilterRegistration("hello filter");
+
+        assertNull(filterRegistration);
+    }
+
+}

spring-boot/src/test/java/com/baeldung/beanvalidation/application/UserControllerIntegrationTest.java

@@ -0,0 +1,70 @@
+package com.baeldung.beanvalidation.application;
+
+import com.baeldung.beanvalidation.application.controllers.UserController;
+import com.baeldung.beanvalidation.application.repositories.UserRepository;
+
+import java.nio.charset.Charset;
+import static org.assertj.core.api.Assertions.assertThat;
+import org.hamcrest.core.Is;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
+
+@RunWith(SpringRunner.class)
+@WebMvcTest
+@AutoConfigureMockMvc
+public class UserControllerIntegrationTest {
+
+    @MockBean
+    private UserRepository userRepository;
+    
+    @Autowired
+    UserController userController;
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void whenUserControllerInjected_thenNotNull() throws Exception {
+        assertThat(userController).isNotNull();
+    }
+
+    @Test
+    public void whenGetRequestToUsers_thenCorrectResponse() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.get("/users")
+                .contentType(MediaType.APPLICATION_JSON_UTF8))
+                .andExpect(MockMvcResultMatchers.status().isOk())
+                .andExpect(MockMvcResultMatchers.content().contentType(MediaType.APPLICATION_JSON_UTF8));
+    
+    }
+    
+    @Test
+    public void whenPostRequestToUsersAndValidUser_thenCorrectResponse() throws Exception {
+        MediaType textPlainUtf8 = new MediaType(MediaType.TEXT_PLAIN, Charset.forName("UTF-8"));
+        String user = "{\"name\": \"bob\", \"email\" : \"bob@domain.com\"}";
+        mockMvc.perform(MockMvcRequestBuilders.post("/users")
+                .content(user)
+                .contentType(MediaType.APPLICATION_JSON_UTF8))
+                .andExpect(MockMvcResultMatchers.status().isOk())
+                .andExpect(MockMvcResultMatchers.content().contentType(textPlainUtf8));
+    }
+    
+    @Test
+    public void whenPostRequestToUsersAndInValidUser_thenCorrectReponse() throws Exception {
+        String user = "{\"name\": \"\", \"email\" : \"bob@domain.com\"}";
+        mockMvc.perform(MockMvcRequestBuilders.post("/users")
+                .content(user)
+                .contentType(MediaType.APPLICATION_JSON_UTF8))
+                .andExpect(MockMvcResultMatchers.status().isBadRequest())
+                .andExpect(MockMvcResultMatchers.jsonPath("$.name", Is.is("Name is mandatory")))
+                .andExpect(MockMvcResultMatchers.content().contentType(MediaType.APPLICATION_JSON_UTF8));
+    }
+}

spring-boot/src/test/java/com/baeldung/displayallbeans/DisplayBeanIntegrationTest.java

@@ -0,0 +1,101 @@
+package com.baeldung.displayallbeans;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.BDDAssertions.then;
+
+import java.net.URI;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.actuate.beans.BeansEndpoint.ContextBeans;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.RequestEntity;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.context.WebApplicationContext;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Application.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@TestPropertySource(properties = { "management.port=0", "management.endpoints.web.exposure.include=*" })
+public class DisplayBeanIntegrationTest {
+
+    @LocalServerPort
+    private int port;
+
+    @Value("${local.management.port}")
+    private int mgt;
+
+    @Autowired
+    private TestRestTemplate testRestTemplate;
+
+    @Autowired
+    private WebApplicationContext context;
+
+    private static final String ACTUATOR_PATH = "/actuator";
+
+    @Test
+    public void givenRestTemplate_whenAccessServerUrl_thenHttpStatusOK() throws Exception {
+        ResponseEntity<String> entity = this.testRestTemplate.getForEntity("http://localhost:" + this.port + "/displayallbeans", String.class);
+
+        then(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+    }
+
+    @Test
+    public void givenRestTemplate_whenAccessEndpointUrl_thenHttpStatusOK() throws Exception {
+        ParameterizedTypeReference<Map<String, ContextBeans>> responseType = new ParameterizedTypeReference<Map<String, ContextBeans>>() {
+        };
+        RequestEntity<Void> requestEntity = RequestEntity.get(new URI("http://localhost:" + this.mgt + ACTUATOR_PATH + "/beans"))
+            .accept(MediaType.APPLICATION_JSON)
+            .build();
+        ResponseEntity<Map<String, ContextBeans>> entity = this.testRestTemplate.exchange(requestEntity, responseType);
+
+        then(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+    }
+
+    @Test
+    public void givenRestTemplate_whenAccessEndpointUrl_thenReturnsBeanNames() throws Exception {
+        RequestEntity<Void> requestEntity = RequestEntity.get(new URI("http://localhost:" + this.mgt + ACTUATOR_PATH + "/beans"))
+            .accept(MediaType.APPLICATION_JSON)
+            .build();
+        ResponseEntity<BeanActuatorResponse> entity = this.testRestTemplate.exchange(requestEntity, BeanActuatorResponse.class);
+
+        Collection<String> beanNamesList = entity.getBody()
+            .getBeans();
+
+        assertThat(beanNamesList).contains("fooController", "fooService");
+    }
+
+    @Test
+    public void givenWebApplicationContext_whenAccessGetBeanDefinitionNames_thenReturnsBeanNames() throws Exception {
+        String[] beanNames = context.getBeanDefinitionNames();
+
+        List<String> beanNamesList = Arrays.asList(beanNames);
+        assertThat(beanNamesList).contains("fooController", "fooService");
+    }
+
+    private static class BeanActuatorResponse {
+        private Map<String, Map<String, Map<String, Map<String, Object>>>> contexts;
+
+        public Collection<String> getBeans() {
+            return this.contexts.get("application")
+                .get("beans")
+                .keySet();
+        }
+
+        public Map<String, Map<String, Map<String, Map<String, Object>>>> getContexts() {
+            return contexts;
+        }
+    }
+}

spring-boot/src/test/java/com/baeldung/failureanalyzer/FailureAnalyzerAppIntegrationTest.java

@@ -0,0 +1,47 @@
+package com.baeldung.failureanalyzer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Collection;
+import java.util.stream.Collectors;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.BeanCreationException;
+import org.springframework.boot.SpringApplication;
+
+import com.baeldung.failureanalyzer.utils.ListAppender;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+
+public class FailureAnalyzerAppIntegrationTest {
+
+    private static final String EXPECTED_ANALYSIS_DESCRIPTION_TITLE = "Description:";
+    private static final String EXPECTED_ANALYSIS_DESCRIPTION_CONTENT = "The bean myDAO could not be injected as com.baeldung.failureanalyzer.MyDAO because it is of type com.baeldung.failureanalyzer.MySecondDAO";
+    private static final String EXPECTED_ANALYSIS_ACTION_TITLE = "Action:";
+    private static final String EXPECTED_ANALYSIS_ACTION_CONTENT = "Consider creating a bean with name myDAO of type com.baeldung.failureanalyzer.MyDAO";
+
+    @BeforeEach
+    public void clearLogList() {
+        ListAppender.clearEventList();
+    }
+
+    @Test
+    public void givenBeanCreationErrorInContext_whenContextLoaded_thenFailureAnalyzerLogsReport() {
+        try {
+            SpringApplication.run(FailureAnalyzerApplication.class);
+        } catch (BeanCreationException e) {
+            Collection<String> allLoggedEntries = ListAppender.getEvents()
+                .stream()
+                .map(ILoggingEvent::getFormattedMessage)
+                .collect(Collectors.toList());
+            assertThat(allLoggedEntries).anyMatch(entry -> entry.contains(EXPECTED_ANALYSIS_DESCRIPTION_TITLE))
+                .anyMatch(entry -> entry.contains(EXPECTED_ANALYSIS_DESCRIPTION_CONTENT))
+                .anyMatch(entry -> entry.contains(EXPECTED_ANALYSIS_ACTION_TITLE))
+                .anyMatch(entry -> entry.contains(EXPECTED_ANALYSIS_ACTION_CONTENT));
+            return;
+        }
+        throw new IllegalStateException("Context load should be failing due to a BeanCreationException!");
+    }
+
+}

spring-boot/src/test/java/com/baeldung/failureanalyzer/utils/ListAppender.java

@@ -0,0 +1,25 @@
+package com.baeldung.failureanalyzer.utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.AppenderBase;
+
+public class ListAppender extends AppenderBase<ILoggingEvent> {
+    
+    static private List<ILoggingEvent> events = new ArrayList<>();
+
+    @Override
+    protected void append(ILoggingEvent eventObject) {
+        events.add(eventObject);
+    }
+    
+    public static List<ILoggingEvent> getEvents() {
+        return events;
+    }
+    
+    public static void clearEventList() {
+        events.clear();
+    }
+}

spring-boot/src/test/java/com/baeldung/git/CommitIdIntegrationTest.java

@@ -0,0 +1,43 @@
+package com.baeldung.git;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = CommitIdApplication.class)
+@TestPropertySource(properties = { "spring.jmx.default-domain=test" })
+public class CommitIdIntegrationTest {
+
+    private static final Logger LOG = LoggerFactory.getLogger(CommitIdIntegrationTest.class);
+
+    @Value("${git.commit.message.short:UNKNOWN}")
+    private String commitMessage;
+
+    @Value("${git.branch:UNKNOWN}")
+    private String branch;
+
+    @Value("${git.commit.id:UNKNOWN}")
+    private String commitId;
+
+    @Test
+    public void whenInjecting_shouldDisplay() throws Exception {
+
+        LOG.info(commitId);
+        LOG.info(commitMessage);
+        LOG.info(branch);
+
+        assertThat(commitMessage).isNotEqualTo("UNKNOWN");
+
+        assertThat(branch).isNotEqualTo("UNKNOWN");
+
+        assertThat(commitId).isNotEqualTo("UNKNOWN");
+    }
+}

spring-boot/src/test/java/com/baeldung/intro/AppLiveTest.java

@@ -0,0 +1,35 @@
+package com.baeldung.intro;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+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.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK)
+@AutoConfigureMockMvc
+public class AppLiveTest {
+
+    @Autowired
+    private MockMvc mvc;
+
+    @Test
+    public void getIndex() throws Exception {
+        mvc.perform(MockMvcRequestBuilders.get("/").accept(MediaType.APPLICATION_JSON)).andExpect(status().isOk()).andExpect(content().string(equalTo("Index Page")));
+    }
+
+    @Test
+    public void getLocal() throws Exception {
+        mvc.perform(MockMvcRequestBuilders.get("/local").accept(MediaType.APPLICATION_JSON)).andExpect(status().isOk()).andExpect(content().string(equalTo("/local")));
+    }
+
+}

spring-boot/src/test/java/com/baeldung/jsondateformat/ContactAppUnitTest.java

@@ -0,0 +1,109 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.io.IOException;
+import java.text.ParseException;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = RANDOM_PORT, classes = ContactApp.class)
+@TestPropertySource(properties = {
+        "spring.jackson.date-format=yyyy-MM-dd HH:mm:ss"
+})
+public class ContactAppUnitTest {
+
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    @Autowired
+    TestRestTemplate restTemplate;
+    
+    @LocalServerPort
+    int port;
+    
+    String url;
+
+    @Before
+    public void before() {
+        url=String.format("http://localhost:%s", port);
+    }
+    
+    @Test
+    public void givenJsonFormatAnnotationAndJava8DateType_whenGet_thenReturnExpectedDateFormat() throws IOException, ParseException {
+        ResponseEntity<String> response = restTemplate.getForEntity(url + "/contacts", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test
+    public void givenJsonFormatAnnotationAndLegacyDateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity(url + "/contacts/javaUtilDate", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test
+    public void givenDefaultDateFormatInAppPropertiesAndLegacyDateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity(url + "/contacts/plainWithJavaUtilDate", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test(expected = DateTimeParseException.class)
+    public void givenDefaultDateFormatInAppPropertiesAndJava8DateType_whenGet_thenNotApplyFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity(url + "/contacts/plain", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+    }
+
+}

spring-boot/src/test/java/com/baeldung/jsondateformat/ContactAppWithObjectMapperCustomizerUnitTest.java

@@ -0,0 +1,76 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.io.IOException;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = RANDOM_PORT, classes = ContactApp.class)
+public class ContactAppWithObjectMapperCustomizerUnitTest {
+
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    @Autowired
+    TestRestTemplate restTemplate;
+
+    @LocalServerPort
+    int port;
+    
+    String url;
+
+    @Before
+    public void before() {
+        url=String.format("http://localhost:%s", port);
+    }
+    
+    @Test
+    public void givenDefaultDateFormatInAppPropertiesAndLegacyDateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity(url + "/contacts/plainWithJavaUtilDate", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test
+    public void givenDefaultDateFormatInAppPropertiesAndJava8DateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity(url + "/contacts/plain", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+}

spring-boot/src/test/java/com/baeldung/kong/KongAdminAPILiveTest.java

@@ -0,0 +1,170 @@
+package com.baeldung.kong;
+
+import com.baeldung.kong.domain.APIObject;
+import com.baeldung.kong.domain.ConsumerObject;
+import com.baeldung.kong.domain.KeyAuthObject;
+import com.baeldung.kong.domain.PluginObject;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.*;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.net.URI;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.DEFINED_PORT;
+
+/**
+ * @author aiet
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = DEFINED_PORT, classes = StockApp.class)
+public class KongAdminAPILiveTest {
+
+    private String getStockPrice(String code) {
+        try {
+            return restTemplate.getForObject(new URI("http://localhost:8080/stock/" + code), String.class);
+        } catch (Exception ignored) {
+        }
+        return null;
+    }
+
+    @Before
+    public void init() {
+        System.setProperty("sun.net.http.allowRestrictedHeaders", "true");
+    }
+
+    @Autowired
+    TestRestTemplate restTemplate;
+
+    @Test
+    public void givenEndpoint_whenQueryStockPrice_thenPriceCorrect() {
+        String response = getStockPrice("btc");
+        assertEquals("10000", response);
+
+        response = getStockPrice("eth");
+        assertEquals("N/A", response);
+    }
+
+    @Test
+    public void givenKongAdminAPI_whenAddAPI_thenAPIAccessibleViaKong() throws Exception {
+        restTemplate.delete("http://localhost:8001/apis/stock-api");
+
+        APIObject stockAPI = new APIObject("stock-api", "stock.api", "http://localhost:9090", "/");
+        HttpEntity<APIObject> apiEntity = new HttpEntity<>(stockAPI);
+        ResponseEntity<String> addAPIResp = restTemplate.postForEntity("http://localhost:8001/apis", apiEntity, String.class);
+
+        assertEquals(HttpStatus.CREATED, addAPIResp.getStatusCode());
+
+        addAPIResp = restTemplate.postForEntity("http://localhost:8001/apis", apiEntity, String.class);
+        assertEquals(HttpStatus.CONFLICT, addAPIResp.getStatusCode());
+        String apiListResp = restTemplate.getForObject("http://localhost:8001/apis/", String.class);
+
+        assertTrue(apiListResp.contains("stock-api"));
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("Host", "stock.api");
+        RequestEntity<String> requestEntity = new RequestEntity<>(headers, HttpMethod.GET, new URI("http://localhost:8000/springbootapp/stock/btc"));
+        ResponseEntity<String> stockPriceResp = restTemplate.exchange(requestEntity, String.class);
+
+        assertEquals("10000", stockPriceResp.getBody());
+    }
+
+    @Test
+    public void givenKongAdminAPI_whenAddAPIConsumer_thenAdded() {
+        restTemplate.delete("http://localhost:8001/consumers/eugenp");
+
+        ConsumerObject consumer = new ConsumerObject("eugenp");
+        HttpEntity<ConsumerObject> addConsumerEntity = new HttpEntity<>(consumer);
+        ResponseEntity<String> addConsumerResp = restTemplate.postForEntity("http://localhost:8001/consumers/", addConsumerEntity, String.class);
+
+        assertEquals(HttpStatus.CREATED, addConsumerResp.getStatusCode());
+
+        addConsumerResp = restTemplate.postForEntity("http://localhost:8001/consumers", addConsumerEntity, String.class);
+        assertEquals(HttpStatus.CONFLICT, addConsumerResp.getStatusCode());
+
+        String consumerListResp = restTemplate.getForObject("http://localhost:8001/consumers/", String.class);
+        assertTrue(consumerListResp.contains("eugenp"));
+    }
+
+    @Test
+    public void givenAPI_whenEnableAuth_thenAnonymousDenied() throws Exception {
+        String apiListResp = restTemplate.getForObject("http://localhost:8001/apis/", String.class);
+        if (!apiListResp.contains("stock-api")) {
+            givenKongAdminAPI_whenAddAPI_thenAPIAccessibleViaKong();
+        }
+
+        PluginObject authPlugin = new PluginObject("key-auth");
+        ResponseEntity<String> enableAuthResp = restTemplate.postForEntity("http://localhost:8001/apis/stock-api/plugins", new HttpEntity<>(authPlugin), String.class);
+
+        assertTrue(HttpStatus.CREATED == enableAuthResp.getStatusCode() || HttpStatus.CONFLICT == enableAuthResp.getStatusCode());
+
+        String pluginsResp = restTemplate.getForObject("http://localhost:8001/apis/stock-api/plugins", String.class);
+        assertTrue(pluginsResp.contains("key-auth"));
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("Host", "stock.api");
+        RequestEntity<String> requestEntity = new RequestEntity<>(headers, HttpMethod.GET, new URI("http://localhost:8000/stock/btc"));
+        ResponseEntity<String> stockPriceResp = restTemplate.exchange(requestEntity, String.class);
+        assertEquals(HttpStatus.UNAUTHORIZED, stockPriceResp.getStatusCode());
+    }
+
+    @Test
+    public void givenAPIAuthEnabled_whenAddKey_thenAccessAllowed() throws Exception {
+        String apiListResp = restTemplate.getForObject("http://localhost:8001/apis/", String.class);
+        if (!apiListResp.contains("stock-api")) {
+            givenKongAdminAPI_whenAddAPI_thenAPIAccessibleViaKong();
+        }
+
+        String consumerListResp = restTemplate.getForObject("http://localhost:8001/consumers/", String.class);
+        if (!consumerListResp.contains("eugenp")) {
+            givenKongAdminAPI_whenAddAPIConsumer_thenAdded();
+        }
+
+        PluginObject authPlugin = new PluginObject("key-auth");
+        ResponseEntity<String> enableAuthResp = restTemplate.postForEntity("http://localhost:8001/apis/stock-api/plugins", new HttpEntity<>(authPlugin), String.class);
+        assertTrue(HttpStatus.CREATED == enableAuthResp.getStatusCode() || HttpStatus.CONFLICT == enableAuthResp.getStatusCode());
+
+        final String consumerKey = "eugenp.pass";
+        KeyAuthObject keyAuth = new KeyAuthObject(consumerKey);
+        ResponseEntity<String> keyAuthResp = restTemplate.postForEntity("http://localhost:8001/consumers/eugenp/key-auth", new HttpEntity<>(keyAuth), String.class);
+        
+        assertTrue(HttpStatus.CREATED == keyAuthResp.getStatusCode() || HttpStatus.CONFLICT == keyAuthResp.getStatusCode());
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("Host", "stock.api");
+        headers.set("apikey", consumerKey);
+        RequestEntity<String> requestEntity = new RequestEntity<>(headers, HttpMethod.GET, new URI("http://localhost:8000/springbootapp/stock/btc"));
+        ResponseEntity<String> stockPriceResp = restTemplate.exchange(requestEntity, String.class);
+
+        assertEquals("10000", stockPriceResp.getBody());
+
+        headers.set("apikey", "wrongpass");
+        requestEntity = new RequestEntity<>(headers, HttpMethod.GET, new URI("http://localhost:8000/springbootapp/stock/btc"));
+        stockPriceResp = restTemplate.exchange(requestEntity, String.class);
+        assertEquals(HttpStatus.FORBIDDEN, stockPriceResp.getStatusCode());
+    }
+
+    @Test
+    public void givenAdminAPIProxy_whenAddAPIViaProxy_thenAPIAdded() throws Exception {
+        APIObject adminAPI = new APIObject("admin-api", "admin.api", "http://localhost:8001", "/admin-api");
+        HttpEntity<APIObject> apiEntity = new HttpEntity<>(adminAPI);
+        ResponseEntity<String> addAPIResp = restTemplate.postForEntity("http://localhost:8001/apis", apiEntity, String.class);
+
+        assertTrue(HttpStatus.CREATED == addAPIResp.getStatusCode() || HttpStatus.CONFLICT == addAPIResp.getStatusCode());
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("Host", "admin.api");
+        APIObject baeldungAPI = new APIObject("baeldung-api", "baeldung.com", "http://ww.baeldung.com", "/");
+        RequestEntity<APIObject> requestEntity = new RequestEntity<>(baeldungAPI, headers, HttpMethod.POST, new URI("http://localhost:8000/admin-api/apis"));
+        addAPIResp = restTemplate.exchange(requestEntity, String.class);
+
+        assertTrue(HttpStatus.CREATED == addAPIResp.getStatusCode() || HttpStatus.CONFLICT == addAPIResp.getStatusCode());
+    }
+
+}

spring-boot/src/test/java/com/baeldung/kong/KongLoadBalanceLiveTest.java

@@ -0,0 +1,75 @@
+package com.baeldung.kong;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.DEFINED_PORT;
+
+import java.net.URI;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.RequestEntity;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.kong.domain.APIObject;
+import com.baeldung.kong.domain.TargetObject;
+import com.baeldung.kong.domain.UpstreamObject;
+
+/**
+ * @author aiet
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = DEFINED_PORT, classes = StockApp.class, properties = "server.servlet.contextPath=/springbootapp")
+public class KongLoadBalanceLiveTest {
+
+    @Before
+    public void init() {
+        System.setProperty("sun.net.http.allowRestrictedHeaders", "true");
+    }
+
+    @Autowired
+    TestRestTemplate restTemplate;
+
+    @Test
+    public void givenKongAdminAPI_whenAddAPI_thenAPIAccessibleViaKong() throws Exception {
+        UpstreamObject upstream = new UpstreamObject("stock.api.service");
+        ResponseEntity<String> addUpstreamResp = restTemplate.postForEntity("http://localhost:8001/upstreams", new HttpEntity<>(upstream), String.class);
+        assertTrue(HttpStatus.CREATED == addUpstreamResp.getStatusCode() || HttpStatus.CONFLICT == addUpstreamResp.getStatusCode());
+
+        TargetObject testTarget = new TargetObject("localhost:8080", 10);
+        ResponseEntity<String> addTargetResp = restTemplate.postForEntity("http://localhost:8001/upstreams/stock.api.service/targets", new HttpEntity<>(testTarget), String.class);
+        assertTrue(HttpStatus.CREATED == addTargetResp.getStatusCode() || HttpStatus.CONFLICT == addTargetResp.getStatusCode());
+
+        TargetObject releaseTarget = new TargetObject("localhost:9090", 40);
+        addTargetResp = restTemplate.postForEntity("http://localhost:8001/upstreams/stock.api.service/targets", new HttpEntity<>(releaseTarget), String.class);
+        assertTrue(HttpStatus.CREATED == addTargetResp.getStatusCode() || HttpStatus.CONFLICT == addTargetResp.getStatusCode());
+
+        APIObject stockAPI = new APIObject("balanced-stock-api", "balanced.stock.api", "http://stock.api.service", "/");
+        HttpEntity<APIObject> apiEntity = new HttpEntity<>(stockAPI);
+        ResponseEntity<String> addAPIResp = restTemplate.postForEntity("http://localhost:8001/apis", apiEntity, String.class);
+        assertTrue(HttpStatus.CREATED == addAPIResp.getStatusCode() || HttpStatus.CONFLICT == addAPIResp.getStatusCode());
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("Host", "balanced.stock.api");
+        for (int i = 0; i < 1000; i++) {
+            RequestEntity<String> requestEntity = new RequestEntity<>(headers, HttpMethod.GET, new URI("http://localhost:8000/springbootapp/stock/btc"));
+            ResponseEntity<String> stockPriceResp = restTemplate.exchange(requestEntity, String.class);
+            assertEquals("10000", stockPriceResp.getBody());
+        }
+
+        int releaseCount = restTemplate.getForObject("http://localhost:9090/springbootapp/stock/reqcount", Integer.class);
+        int testCount = restTemplate.getForObject("http://localhost:8080/springbootapp/stock/reqcount", Integer.class);
+
+        assertTrue(Math.round(releaseCount * 1.0 / testCount) == 4);
+    }
+
+}

spring-boot/src/test/java/com/baeldung/kong/domain/APIObject.java

@@ -0,0 +1,54 @@
+package com.baeldung.kong.domain;
+
+/**
+ * @author aiet
+ */
+public class APIObject {
+
+    public APIObject() {
+    }
+
+    public APIObject(String name, String hosts, String upstream_url, String uris) {
+        this.name = name;
+        this.hosts = hosts;
+        this.upstream_url = upstream_url;
+        this.uris = uris;
+    }
+
+    private String name;
+    private String hosts;
+    private String upstream_url;
+    private String uris;
+
+    public String getUris() {
+        return uris;
+    }
+
+    public void setUris(String uris) {
+        this.uris = uris;
+    }
+
+    public String getUpstream_url() {
+        return upstream_url;
+    }
+
+    public void setUpstream_url(String upstream_url) {
+        this.upstream_url = upstream_url;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getHosts() {
+        return hosts;
+    }
+
+    public void setHosts(String hosts) {
+        this.hosts = hosts;
+    }
+}

spring-boot/src/test/java/com/baeldung/kong/domain/ConsumerObject.java

@@ -0,0 +1,35 @@
+package com.baeldung.kong.domain;
+
+/**
+ * @author aiet
+ */
+public class ConsumerObject {
+
+    private String username;
+    private String custom_id;
+
+    public ConsumerObject(String username) {
+        this.username = username;
+    }
+
+    public ConsumerObject(String username, String custom_id) {
+        this.username = username;
+        this.custom_id = custom_id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getCustom_id() {
+        return custom_id;
+    }
+
+    public void setCustom_id(String custom_id) {
+        this.custom_id = custom_id;
+    }
+}

spring-boot/src/test/java/com/baeldung/kong/domain/KeyAuthObject.java

@@ -0,0 +1,21 @@
+package com.baeldung.kong.domain;
+
+/**
+ * @author aiet
+ */
+public class KeyAuthObject {
+
+    public KeyAuthObject(String key) {
+        this.key = key;
+    }
+
+    private String key;
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+}

spring-boot/src/test/java/com/baeldung/kong/domain/PluginObject.java

@@ -0,0 +1,30 @@
+package com.baeldung.kong.domain;
+
+/**
+ * @author aiet
+ */
+public class PluginObject {
+
+    private String name;
+    private String consumer_id;
+
+    public PluginObject(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getConsumer_id() {
+        return consumer_id;
+    }
+
+    public void setConsumer_id(String consumer_id) {
+        this.consumer_id = consumer_id;
+    }
+}

spring-boot/src/test/java/com/baeldung/kong/domain/TargetObject.java

@@ -0,0 +1,31 @@
+package com.baeldung.kong.domain;
+
+/**
+ * @author aiet
+ */
+public class TargetObject {
+
+    public TargetObject(String target, int weight) {
+        this.target = target;
+        this.weight = weight;
+    }
+
+    private String target;
+    private int weight;
+
+    public String getTarget() {
+        return target;
+    }
+
+    public void setTarget(String target) {
+        this.target = target;
+    }
+
+    public int getWeight() {
+        return weight;
+    }
+
+    public void setWeight(int weight) {
+        this.weight = weight;
+    }
+}

spring-boot/src/test/java/com/baeldung/kong/domain/UpstreamObject.java

@@ -0,0 +1,21 @@
+package com.baeldung.kong.domain;
+
+/**
+ * @author aiet
+ */
+public class UpstreamObject {
+
+    public UpstreamObject(String name) {
+        this.name = name;
+    }
+
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

spring-boot/src/test/java/com/baeldung/servletinitializer/WarInitializerApplicationIntegrationTest.java

@@ -0,0 +1,36 @@
+package com.baeldung.servletinitializer;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import com.baeldung.servletinitializer.WarInitializerApplication.WarInitializerController;
+
+@RunWith(SpringRunner.class)
+@WebMvcTest(controllers = WarInitializerController.class)
+public class WarInitializerApplicationIntegrationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void whenContextRootUrlIsAccessed_thenStatusIsOk() throws Exception {
+        mockMvc.perform(get("/"))
+            .andExpect(status().is(200));
+    }
+
+    @Test
+    public void whenContextRootUrlIsAccesed_thenCorrectStringIsReturned() throws Exception {
+        mockMvc.perform(get("/"))
+            .andExpect(content().string(containsString("WarInitializerApplication is up and running!")));
+    }
+
+}

spring-boot/src/test/java/com/baeldung/toggle/ToggleIntegrationTest.java

@@ -0,0 +1,62 @@
+package com.baeldung.toggle;
+
+import static org.junit.Assert.assertEquals;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+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.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK, classes = ToggleApplication.class)
+@AutoConfigureMockMvc
+public class ToggleIntegrationTest {
+
+    @Autowired
+    private EmployeeRepository employeeRepository;
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setup() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
+    }
+
+    @Test
+    public void givenFeaturePropertyFalse_whenIncreaseSalary_thenNoIncrease() throws Exception {
+        Employee emp = new Employee(1, 2000);
+        employeeRepository.save(emp);
+
+        System.setProperty("employee.feature", "false");
+
+        mockMvc.perform(post("/increaseSalary").param("id", emp.getId() + "")).andExpect(status().is(200));
+
+        emp = employeeRepository.findById(1L).orElse(null);
+        assertEquals("salary incorrect", 2000, emp.getSalary(), 0.5);
+    }
+
+    @Test
+    public void givenFeaturePropertyTrue_whenIncreaseSalary_thenIncrease() throws Exception {
+        Employee emp = new Employee(1, 2000);
+        employeeRepository.save(emp);
+
+        System.setProperty("employee.feature", "true");
+
+        mockMvc.perform(post("/increaseSalary").param("id", emp.getId() + "")).andExpect(status().is(200));
+
+        emp = employeeRepository.findById(1L).orElse(null);
+        assertEquals("salary incorrect", 2200, emp.getSalary(), 0.5);
+    }
+}

spring-boot/src/test/java/com/baeldung/utils/UtilsControllerIntegrationTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.utils;
+
+import com.baeldung.utils.controller.UtilsController;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.InjectMocks;
+import org.mockito.MockitoAnnotations;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+public class UtilsControllerIntegrationTest {
+
+    @InjectMocks
+    private UtilsController utilsController;
+
+    private MockMvc mockMvc;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        this.mockMvc = MockMvcBuilders.standaloneSetup(utilsController).build();
+
+    }
+
+    @Test
+    public void givenParameter_setRequestParam_andSetSessionAttribute() throws Exception {
+        String param = "testparam";
+        this.mockMvc.perform(post("/setParam").param("param", param).sessionAttr("parameter", param)).andExpect(status().isOk());
+    }
+
+}

spring-boot/src/test/java/org/baeldung/boot/ApplicationIntegrationTest.java

@@ -0,0 +1,17 @@
+package org.baeldung.boot;
+
+import org.baeldung.session.exception.Application;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Application.class)
+@TestPropertySource("classpath:exception.properties")
+public class ApplicationIntegrationTest {
+    @Test
+    public void contextLoads() {
+    }
+}

spring-boot/src/test/java/org/baeldung/boot/DemoApplicationIntegrationTest.java

@@ -0,0 +1,17 @@
+package org.baeldung.boot;
+
+import org.baeldung.demo.DemoApplication;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = DemoApplication.class, webEnvironment = WebEnvironment.RANDOM_PORT)
+public class DemoApplicationIntegrationTest {
+
+    @Test
+    public void contextLoads() {
+    }
+}

spring-boot/src/test/java/org/baeldung/boot/jsoncomponent/UserJsonDeserializerIntegrationTest.java

@@ -0,0 +1,29 @@
+package org.baeldung.boot.jsoncomponent;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import javafx.scene.paint.Color;
+
+import org.baeldung.boot.jsoncomponent.User;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.json.JsonTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+
+@JsonTest
+@RunWith(SpringRunner.class)
+public class UserJsonDeserializerIntegrationTest {
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    @Test
+    public void testDeserialize() throws IOException {
+        User user = objectMapper.readValue("{\"favoriteColor\":\"#f0f8ff\"}", User.class);
+        assertEquals(Color.ALICEBLUE, user.getFavoriteColor());
+    }
+}

spring-boot/src/test/java/org/baeldung/boot/jsoncomponent/UserJsonSerializerIntegrationTest.java

@@ -0,0 +1,28 @@
+package org.baeldung.boot.jsoncomponent;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import javafx.scene.paint.Color;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.json.JsonTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.junit.Assert.assertEquals;
+
+import org.baeldung.boot.jsoncomponent.User;
+
+@JsonTest
+@RunWith(SpringRunner.class)
+public class UserJsonSerializerIntegrationTest {
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    @Test
+    public void testSerialization() throws JsonProcessingException {
+        String json = objectMapper.writeValueAsString(new User(Color.ALICEBLUE));
+        assertEquals("{\"favoriteColor\":\"#f0f8ff\"}", json);
+    }
+}

spring-boot/src/test/java/org/baeldung/boot/repository/FooRepositoryIntegrationTest.java

@@ -0,0 +1,35 @@
+package org.baeldung.boot.repository;
+
+import static org.junit.Assert.assertThat;
+
+import org.baeldung.boot.DemoApplicationIntegrationTest;
+import org.baeldung.demo.model.Foo;
+import org.baeldung.demo.repository.FooRepository;
+
+import static org.hamcrest.Matchers.notNullValue;
+import static org.hamcrest.Matchers.is;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.transaction.annotation.Transactional;
+
+@Transactional
+public class FooRepositoryIntegrationTest extends DemoApplicationIntegrationTest {
+    @Autowired
+    private FooRepository fooRepository;
+
+    @Before
+    public void setUp() {
+        fooRepository.save(new Foo("Foo"));
+        fooRepository.save(new Foo("Bar"));
+    }
+
+    @Test
+    public void testFindByName() {
+        Foo foo = fooRepository.findByName("Bar");
+        assertThat(foo, notNullValue());
+        assertThat(foo.getId(), is(2));
+    }
+
+}

spring-boot/src/test/java/org/baeldung/boot/repository/HibernateSessionIntegrationTest.java

@@ -0,0 +1,30 @@
+package org.baeldung.boot.repository;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+import org.baeldung.boot.DemoApplicationIntegrationTest;
+import org.baeldung.demo.model.Foo;
+import org.baeldung.demo.repository.FooRepository;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.transaction.annotation.Transactional;
+
+@Transactional
+public class HibernateSessionIntegrationTest extends DemoApplicationIntegrationTest {
+    @Autowired
+    private FooRepository fooRepository;
+
+    @Test
+    public void whenSavingWithCurrentSession_thenThrowNoException() {
+        Foo foo = new Foo("Exception Solved");
+        fooRepository.save(foo);
+        foo = null;
+        foo = fooRepository.findByName("Exception Solved");
+
+        assertThat(foo, notNullValue());
+        assertThat(foo.getId(), is(1));
+        assertThat(foo.getName(), is("Exception Solved"));
+    }
+}

spring-boot/src/test/java/org/baeldung/boot/repository/NoHibernateSessionIntegrationTest.java

@@ -0,0 +1,23 @@
+package org.baeldung.boot.repository;
+
+import org.baeldung.boot.ApplicationIntegrationTest;
+import org.baeldung.demo.model.Foo;
+import org.baeldung.session.exception.repository.FooRepository;
+import org.hibernate.HibernateException;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.transaction.annotation.Transactional;
+
+@Transactional
+@TestPropertySource("classpath:exception-hibernate.properties")
+public class NoHibernateSessionIntegrationTest extends ApplicationIntegrationTest {
+    @Autowired
+    private FooRepository fooRepository;
+
+    @Test(expected = HibernateException.class)
+    public void whenSavingWithoutCurrentSession_thenThrowException() {
+        Foo foo = new Foo("Exception Thrown");
+        fooRepository.save(foo);
+    }
+}

spring-boot/src/test/java/org/baeldung/converter/CustomConverterIntegrationTest.java

@@ -0,0 +1,50 @@
+package org.baeldung.converter;
+
+import com.baeldung.toggle.Employee;
+
+import org.baeldung.boot.Application;
+import org.baeldung.boot.domain.Modes;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.core.convert.ConversionService;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+import java.math.BigDecimal;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = Application.class)
+@WebAppConfiguration
+public class CustomConverterIntegrationTest {
+
+    @Autowired
+    ConversionService conversionService;
+
+    @Test
+    public void whenConvertStringToIntegerUsingDefaultConverter_thenSuccess() {
+        assertThat(conversionService.convert("25", Integer.class)).isEqualTo(25);
+    }
+
+    @Test
+    public void whenConvertStringToEmployee_thenSuccess() {
+        Employee employee = conversionService.convert("1,50000.00", Employee.class);
+        Employee actualEmployee = new Employee(1, 50000.00);
+        assertThat(conversionService.convert("1,50000.00", Employee.class)).isEqualToComparingFieldByField(actualEmployee);
+    }
+
+    @Test
+    public void whenConvertStringToEnum_thenSuccess() {
+        assertThat(conversionService.convert("ALPHA", Modes.class)).isEqualTo(Modes.ALPHA);
+    }
+
+    @Test
+    public void whenConvertingToBigDecimalUsingGenericConverter_thenSuccess() {
+        assertThat(conversionService.convert(Integer.valueOf(11), BigDecimal.class)).isEqualTo(BigDecimal.valueOf(11.00).setScale(2, BigDecimal.ROUND_HALF_EVEN));
+        assertThat(conversionService.convert(Double.valueOf(25.23), BigDecimal.class)).isEqualByComparingTo(BigDecimal.valueOf(Double.valueOf(25.23)));
+        assertThat(conversionService.convert("2.32", BigDecimal.class)).isEqualTo(BigDecimal.valueOf(2.32));
+    }
+}

spring-boot/src/test/java/org/baeldung/converter/controller/StringToEmployeeConverterControllerIntegrationTest.java

@@ -0,0 +1,31 @@
+package org.baeldung.converter.controller;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+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.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.baeldung.boot.Application;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK, classes = Application.class)
+@AutoConfigureMockMvc
+public class StringToEmployeeConverterControllerIntegrationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void getStringToEmployeeTest() throws Exception {
+        mockMvc.perform(get("/string-to-employee?employee=1,2000")).andDo(print()).andExpect(jsonPath("$.id", is(1))).andExpect(jsonPath("$.salary", is(2000.0))).andExpect(status().isOk());
+    }
+}

spring-boot/src/test/java/org/baeldung/demo/boottest/EmployeeControllerIntegrationTest.java

@@ -0,0 +1,71 @@
+package org.baeldung.demo.boottest;
+
+import org.baeldung.demo.boottest.Employee;
+import org.baeldung.demo.boottest.EmployeeRestController;
+import org.baeldung.demo.boottest.EmployeeService;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+import org.mockito.internal.verification.VerificationModeFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.Matchers.hasSize;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.verify;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@RunWith(SpringRunner.class)
+@WebMvcTest(EmployeeRestController.class)
+public class EmployeeControllerIntegrationTest {
+
+    @Autowired
+    private MockMvc mvc;
+
+    @MockBean
+    private EmployeeService service;
+
+    @Before
+    public void setUp() throws Exception {
+    }
+
+    @Test
+    public void whenPostEmployee_thenCreateEmployee() throws Exception {
+        Employee alex = new Employee("alex");
+        given(service.save(Mockito.any())).willReturn(alex);
+
+        mvc.perform(post("/api/employees").contentType(MediaType.APPLICATION_JSON).content(JsonUtil.toJson(alex))).andExpect(status().isCreated()).andExpect(jsonPath("$.name", is("alex")));
+        verify(service, VerificationModeFactory.times(1)).save(Mockito.any());
+        reset(service);
+    }
+
+    @Test
+    public void givenEmployees_whenGetEmployees_thenReturnJsonArray() throws Exception {
+        Employee alex = new Employee("alex");
+        Employee john = new Employee("john");
+        Employee bob = new Employee("bob");
+
+        List<Employee> allEmployees = Arrays.asList(alex, john, bob);
+
+        given(service.getAllEmployees()).willReturn(allEmployees);
+
+        mvc.perform(get("/api/employees").contentType(MediaType.APPLICATION_JSON)).andExpect(status().isOk()).andExpect(jsonPath("$", hasSize(3))).andExpect(jsonPath("$[0].name", is(alex.getName()))).andExpect(jsonPath("$[1].name", is(john.getName())))
+                .andExpect(jsonPath("$[2].name", is(bob.getName())));
+        verify(service, VerificationModeFactory.times(1)).getAllEmployees();
+        reset(service);
+    }
+
+}

spring-boot/src/test/java/org/baeldung/demo/boottest/EmployeeRepositoryIntegrationTest.java

@@ -0,0 +1,71 @@
+package org.baeldung.demo.boottest;
+
+import org.baeldung.demo.boottest.Employee;
+import org.baeldung.demo.boottest.EmployeeRepository;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringRunner.class)
+@DataJpaTest
+public class EmployeeRepositoryIntegrationTest {
+
+    @Autowired
+    private TestEntityManager entityManager;
+
+    @Autowired
+    private EmployeeRepository employeeRepository;
+
+    @Test
+    public void whenFindByName_thenReturnEmployee() {
+        Employee alex = new Employee("alex");
+        entityManager.persistAndFlush(alex);
+
+        Employee found = employeeRepository.findByName(alex.getName());
+        assertThat(found.getName()).isEqualTo(alex.getName());
+    }
+
+    @Test
+    public void whenInvalidName_thenReturnNull() {
+        Employee fromDb = employeeRepository.findByName("doesNotExist");
+        assertThat(fromDb).isNull();
+    }
+
+    @Test
+    public void whenFindById_thenReturnEmployee() {
+        Employee emp = new Employee("test");
+        entityManager.persistAndFlush(emp);
+
+        Employee fromDb = employeeRepository.findById(emp.getId()).orElse(null);
+        assertThat(fromDb.getName()).isEqualTo(emp.getName());
+    }
+
+    @Test
+    public void whenInvalidId_thenReturnNull() {
+        Employee fromDb = employeeRepository.findById(-11l).orElse(null);
+        assertThat(fromDb).isNull();
+    }
+
+    @Test
+    public void givenSetOfEmployees_whenFindAll_thenReturnAllEmployees() {
+        Employee alex = new Employee("alex");
+        Employee ron = new Employee("ron");
+        Employee bob = new Employee("bob");
+
+        entityManager.persist(alex);
+        entityManager.persist(bob);
+        entityManager.persist(ron);
+        entityManager.flush();
+
+        List<Employee> allEmployees = employeeRepository.findAll();
+
+        assertThat(allEmployees).hasSize(3).extracting(Employee::getName).containsOnly(alex.getName(), ron.getName(), bob.getName());
+    }
+}

spring-boot/src/test/java/org/baeldung/demo/boottest/EmployeeRestControllerIntegrationTest.java

@@ -0,0 +1,80 @@
+package org.baeldung.demo.boottest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.hamcrest.Matchers.hasSize;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.baeldung.demo.DemoApplication;
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT, classes = DemoApplication.class)
+@AutoConfigureMockMvc 
+// @TestPropertySource(locations = "classpath:application-integrationtest.properties")
+@AutoConfigureTestDatabase
+public class EmployeeRestControllerIntegrationTest {
+
+    @Autowired
+    private MockMvc mvc;
+
+    @Autowired
+    private EmployeeRepository repository;
+
+    @After
+    public void resetDb() {
+        repository.deleteAll();
+    }
+
+    @Test
+    public void whenValidInput_thenCreateEmployee() throws IOException, Exception {
+        Employee bob = new Employee("bob");
+        mvc.perform(post("/api/employees").contentType(MediaType.APPLICATION_JSON).content(JsonUtil.toJson(bob)));
+
+        List<Employee> found = repository.findAll();
+        assertThat(found).extracting(Employee::getName).containsOnly("bob");
+    }
+
+    @Test
+    public void givenEmployees_whenGetEmployees_thenStatus200() throws Exception {
+        createTestEmployee("bob");
+        createTestEmployee("alex");
+
+        // @formatter:off
+        mvc.perform(get("/api/employees").contentType(MediaType.APPLICATION_JSON))
+          .andDo(print())
+          .andExpect(status().isOk())
+          .andExpect(content().contentTypeCompatibleWith(MediaType.APPLICATION_JSON))
+          .andExpect(jsonPath("$", hasSize(greaterThanOrEqualTo(2))))
+          .andExpect(jsonPath("$[0].name", is("bob")))
+          .andExpect(jsonPath("$[1].name", is("alex")));
+        // @formatter:on
+    }
+
+    //
+
+    private void createTestEmployee(String name) {
+        Employee emp = new Employee(name);
+        repository.saveAndFlush(emp);
+    }
+
+}

spring-boot/src/test/java/org/baeldung/demo/boottest/EmployeeServiceImplIntegrationTest.java

@@ -0,0 +1,127 @@
+package org.baeldung.demo.boottest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+import org.mockito.internal.verification.VerificationModeFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+public class EmployeeServiceImplIntegrationTest {
+
+    @TestConfiguration
+    static class EmployeeServiceImplTestContextConfiguration {
+        @Bean
+        public EmployeeService employeeService() {
+            return new EmployeeServiceImpl();
+        }
+    }
+
+    @Autowired
+    private EmployeeService employeeService;
+
+    @MockBean
+    private EmployeeRepository employeeRepository;
+
+    @Before
+    public void setUp() {
+        Employee john = new Employee("john");
+        john.setId(11L);
+
+        Employee bob = new Employee("bob");
+        Employee alex = new Employee("alex");
+
+        List<Employee> allEmployees = Arrays.asList(john, bob, alex);
+
+        Mockito.when(employeeRepository.findByName(john.getName())).thenReturn(john);
+        Mockito.when(employeeRepository.findByName(alex.getName())).thenReturn(alex);
+        Mockito.when(employeeRepository.findByName("wrong_name")).thenReturn(null);
+        Mockito.when(employeeRepository.findById(john.getId())).thenReturn(Optional.of(john));
+        Mockito.when(employeeRepository.findAll()).thenReturn(allEmployees);
+        Mockito.when(employeeRepository.findById(-99L)).thenReturn(Optional.empty());
+    }
+
+    @Test
+    public void whenValidName_thenEmployeeShouldBeFound() {
+        String name = "alex";
+        Employee found = employeeService.getEmployeeByName(name);
+
+        assertThat(found.getName()).isEqualTo(name);
+    }
+
+    @Test
+    public void whenInValidName_thenEmployeeShouldNotBeFound() {
+        Employee fromDb = employeeService.getEmployeeByName("wrong_name");
+        assertThat(fromDb).isNull();
+
+        verifyFindByNameIsCalledOnce("wrong_name");
+    }
+
+    @Test
+    public void whenValidName_thenEmployeeShouldExist() {
+        boolean doesEmployeeExist = employeeService.exists("john");
+        assertThat(doesEmployeeExist).isEqualTo(true);
+
+        verifyFindByNameIsCalledOnce("john");
+    }
+
+    @Test
+    public void whenNonExistingName_thenEmployeeShouldNotExist() {
+        boolean doesEmployeeExist = employeeService.exists("some_name");
+        assertThat(doesEmployeeExist).isEqualTo(false);
+
+        verifyFindByNameIsCalledOnce("some_name");
+    }
+
+    @Test
+    public void whenValidId_thenEmployeeShouldBeFound() {
+        Employee fromDb = employeeService.getEmployeeById(11L);
+        assertThat(fromDb.getName()).isEqualTo("john");
+
+        verifyFindByIdIsCalledOnce();
+    }
+
+    @Test
+    public void whenInValidId_thenEmployeeShouldNotBeFound() {
+        Employee fromDb = employeeService.getEmployeeById(-99L);
+        verifyFindByIdIsCalledOnce();
+        assertThat(fromDb).isNull();
+    }
+
+    @Test
+    public void given3Employees_whengetAll_thenReturn3Records() {
+        Employee alex = new Employee("alex");
+        Employee john = new Employee("john");
+        Employee bob = new Employee("bob");
+
+        List<Employee> allEmployees = employeeService.getAllEmployees();
+        verifyFindAllEmployeesIsCalledOnce();
+        assertThat(allEmployees).hasSize(3).extracting(Employee::getName).contains(alex.getName(), john.getName(), bob.getName());
+    }
+
+    private void verifyFindByNameIsCalledOnce(String name) {
+        Mockito.verify(employeeRepository, VerificationModeFactory.times(1)).findByName(name);
+        Mockito.reset(employeeRepository);
+    }
+
+    private void verifyFindByIdIsCalledOnce() {
+        Mockito.verify(employeeRepository, VerificationModeFactory.times(1)).findById(Mockito.anyLong());
+        Mockito.reset(employeeRepository);
+    }
+
+    private void verifyFindAllEmployeesIsCalledOnce() {
+        Mockito.verify(employeeRepository, VerificationModeFactory.times(1)).findAll();
+        Mockito.reset(employeeRepository);
+    }
+}

spring-boot/src/test/java/org/baeldung/demo/boottest/JsonUtil.java

@@ -0,0 +1,14 @@
+package org.baeldung.demo.boottest;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+
+class JsonUtil {
+    static byte[] toJson(Object object) throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+        return mapper.writeValueAsBytes(object);
+    }
+}

spring-boot/src/test/java/org/baeldung/repository/UserRepositoryIntegrationTest.java

@@ -0,0 +1,72 @@
+package org.baeldung.repository;
+
+import org.baeldung.boot.config.H2JpaConfig;
+import org.baeldung.model.User;
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Created by adam.
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = H2JpaConfig.class)
+public class UserRepositoryIntegrationTest {
+
+    private final String USER_NAME_ADAM = "Adam";
+    private final Integer ACTIVE_STATUS = 1;
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Test
+    public void givenEmptyDBWhenFindOneByNameThenReturnEmptyOptional() {
+        Optional<User> foundUser = userRepository.findOneByName(USER_NAME_ADAM);
+
+        assertThat(foundUser.isPresent()).isEqualTo(false);
+    }
+
+    @Test
+    public void givenUserInDBWhenFindOneByNameThenReturnOptionalWithUser() {
+        User user = new User();
+        user.setName(USER_NAME_ADAM);
+        userRepository.save(user);
+
+        Optional<User> foundUser = userRepository.findOneByName(USER_NAME_ADAM);
+
+        assertThat(foundUser.isPresent()).isEqualTo(true);
+
+        assertThat(foundUser
+          .get()
+          .getName()).isEqualTo(USER_NAME_ADAM);
+    }
+
+    @Test
+    public void givenUserInDBWhenFindOneByStatusAsyncThenReturnCompletableFutureUser() throws ExecutionException, InterruptedException {
+        User user = new User();
+        user.setName(USER_NAME_ADAM);
+        user.setStatus(ACTIVE_STATUS);
+        userRepository.save(user);
+
+        CompletableFuture<User> userByStatus = userRepository.findOneByStatus(ACTIVE_STATUS);
+
+        assertThat(userByStatus
+          .get()
+          .getName()).isEqualTo(USER_NAME_ADAM);
+    }
+
+    @After
+    public void cleanUp() {
+        userRepository.deleteAll();
+    }
+
+}