diff --git a/pom.xml b/pom.xml
index d537adf08e..033215d6ae 100644
--- a/pom.xml
+++ b/pom.xml
@@ -149,6 +149,7 @@
         <module>spring-batch</module>
         <module>spring-bom</module>
         <module>spring-boot</module>
+        <module>spring-boot-bootstrap</module>
         <module>spring-cloud-data-flow</module>
         <module>spring-cloud</module>
         <module>spring-core</module>
diff --git a/spring-boot-bootstrap/pom.xml b/spring-boot-bootstrap/pom.xml
index 9da37a3261..5ad8330a89 100644
--- a/spring-boot-bootstrap/pom.xml
+++ b/spring-boot-bootstrap/pom.xml
@@ -12,10 +12,10 @@
     <description>Demo project for Spring Boot</description>
 
     <parent>
-        <groupId>org.springframework.boot</groupId>
-        <artifactId>spring-boot-starter-parent</artifactId>
-        <version>1.5.3.RELEASE</version>
-        <relativePath /> <!-- lookup parent from repository -->
+        <artifactId>parent-boot-5</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-5</relativePath>
     </parent>
 	
     <!-- add dependency management if you have a different parent pom
@@ -90,5 +90,74 @@
         </plugins>
     </build>
 
+    <profiles>
+        <profile>
+            <id>integration</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>integration-test</phase>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <configuration>
+                                    <excludes>
+                                        <exclude>**/*LiveTest.java</exclude>
+                                        <exclude>**/AutoconfigurationTest.java</exclude>
+                                    </excludes>
+                                    <includes>
+                                        <include>**/*IntegrationTest.java</include>
+                                    </includes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <systemPropertyVariables>
+                                <test.mime>json</test.mime>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+        <profile>
+            <id>autoconfiguration</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>integration-test</phase>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <configuration>
+                                    <excludes>
+                                        <exclude>**/*LiveTest.java</exclude>
+                                        <exclude>**/*IntegrationTest.java</exclude>
+                                    </excludes>
+                                    <includes>
+                                        <include>**/AutoconfigurationTest.java</include>
+                                    </includes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <systemPropertyVariables>
+                                <test.mime>json</test.mime>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+
 
 </project>
diff --git a/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/model/Book.java b/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/model/Book.java
index 02060e17c9..745a1d0460 100644
--- a/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/model/Book.java
+++ b/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/model/Book.java
@@ -8,6 +8,7 @@ import javax.persistence.Id;
 
 @Entity
 public class Book {
+
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     private long id;
@@ -18,8 +19,6 @@ public class Book {
     @Column(nullable = false)
     private String author;
 
-    //
-
     public Book() {
         super();
     }
diff --git a/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/repo/BookRepository.java b/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/repo/BookRepository.java
index ec3a3e25bc..5dead9c930 100644
--- a/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/repo/BookRepository.java
+++ b/spring-boot-bootstrap/src/main/java/org/baeldung/persistence/repo/BookRepository.java
@@ -1,10 +1,12 @@
 package org.baeldung.persistence.repo;
 
-import java.util.List;
-
 import org.baeldung.persistence.model.Book;
 import org.springframework.data.repository.CrudRepository;
 
+import java.util.List;
+import java.util.Optional;
+
 public interface BookRepository extends CrudRepository<Book, Long> {
     List<Book> findByTitle(String title);
+    Optional<Book> findOne(long id);
 }
diff --git a/spring-boot-bootstrap/src/main/java/org/baeldung/web/BookController.java b/spring-boot-bootstrap/src/main/java/org/baeldung/web/BookController.java
index 544ac80217..68393fe5ce 100644
--- a/spring-boot-bootstrap/src/main/java/org/baeldung/web/BookController.java
+++ b/spring-boot-bootstrap/src/main/java/org/baeldung/web/BookController.java
@@ -1,7 +1,5 @@
 package org.baeldung.web;
 
-import java.util.List;
-
 import org.baeldung.persistence.model.Book;
 import org.baeldung.persistence.repo.BookRepository;
 import org.baeldung.web.exception.BookIdMismatchException;
@@ -18,6 +16,8 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.List;
+
 @RestController
 @RequestMapping("/api/books")
 public class BookController {
@@ -36,12 +36,9 @@ public class BookController {
     }
 
     @GetMapping("/{id}")
-    public Book findOne(@PathVariable Long id) {
-        final Book book = bookRepository.findOne(id);
-        if (book == null) {
-            throw new BookNotFoundException();
-        }
-        return book;
+    public Book findOne(@PathVariable long id) {
+        return bookRepository.findOne(id)
+          .orElseThrow(BookNotFoundException::new);
     }
 
     @PostMapping
@@ -51,24 +48,19 @@ public class BookController {
     }
 
     @DeleteMapping("/{id}")
-    public void delete(@PathVariable Long id) {
-        final Book book = bookRepository.findOne(id);
-        if (book == null) {
-            throw new BookNotFoundException();
-        }
+    public void delete(@PathVariable long id) {
+        bookRepository.findOne(id)
+          .orElseThrow(BookNotFoundException::new);
         bookRepository.delete(id);
     }
 
     @PutMapping("/{id}")
-    public Book updateBook(@RequestBody Book book, @PathVariable Long id) {
+    public Book updateBook(@RequestBody Book book, @PathVariable long id) {
         if (book.getId() != id) {
             throw new BookIdMismatchException();
         }
-        final Book old = bookRepository.findOne(id);
-        if (old == null) {
-            throw new BookNotFoundException();
-        }
+        bookRepository.findOne(id)
+          .orElseThrow(BookNotFoundException::new);
         return bookRepository.save(book);
     }
-
 }
diff --git a/spring-boot-bootstrap/src/main/java/org/baeldung/web/RestExceptionHandler.java b/spring-boot-bootstrap/src/main/java/org/baeldung/web/RestExceptionHandler.java
index 60153fc92f..cc5b8ee394 100644
--- a/spring-boot-bootstrap/src/main/java/org/baeldung/web/RestExceptionHandler.java
+++ b/spring-boot-bootstrap/src/main/java/org/baeldung/web/RestExceptionHandler.java
@@ -19,14 +19,18 @@ public class RestExceptionHandler extends ResponseEntityExceptionHandler {
         super();
     }
 
-    @ExceptionHandler({ BookNotFoundException.class })
+    @ExceptionHandler(BookNotFoundException.class)
     protected ResponseEntity<Object> handleNotFound(Exception ex, WebRequest request) {
         return handleExceptionInternal(ex, "Book not found", new HttpHeaders(), HttpStatus.NOT_FOUND, request);
     }
 
-    @ExceptionHandler({ BookIdMismatchException.class, ConstraintViolationException.class, DataIntegrityViolationException.class })
+    @ExceptionHandler({
+      BookIdMismatchException.class,
+      ConstraintViolationException.class,
+      DataIntegrityViolationException.class
+    })
     public ResponseEntity<Object> handleBadRequest(Exception ex, WebRequest request) {
-        return handleExceptionInternal(ex, ex.getLocalizedMessage(), new HttpHeaders(), HttpStatus.BAD_REQUEST, request);
+        return handleExceptionInternal(ex, ex
+          .getLocalizedMessage(), new HttpHeaders(), HttpStatus.BAD_REQUEST, request);
     }
-
 }
\ No newline at end of file
diff --git a/spring-boot-bootstrap/src/main/java/org/baeldung/web/SimpleController.java b/spring-boot-bootstrap/src/main/java/org/baeldung/web/SimpleController.java
index 0bec973a75..809d6c1094 100644
--- a/spring-boot-bootstrap/src/main/java/org/baeldung/web/SimpleController.java
+++ b/spring-boot-bootstrap/src/main/java/org/baeldung/web/SimpleController.java
@@ -7,6 +7,7 @@ import org.springframework.web.bind.annotation.RequestMapping;
 
 @Controller
 public class SimpleController {
+
     @Value("${spring.application.name}")
     String appName;
 
@@ -15,5 +16,4 @@ public class SimpleController {
         model.addAttribute("appName", appName);
         return "home";
     }
-
 }
diff --git a/spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapApplicationTests.java b/spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapApplicationIntegrationTest.java
similarity index 83%
rename from spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapApplicationTests.java
rename to spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapApplicationIntegrationTest.java
index f32315ef03..7c54288665 100644
--- a/spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapApplicationTests.java
+++ b/spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapApplicationIntegrationTest.java
@@ -7,10 +7,9 @@ import org.springframework.test.context.junit4.SpringRunner;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest
-public class SpringBootBootstrapApplicationTests {
+public class SpringBootBootstrapApplicationIntegrationTest {
 
     @Test
     public void contextLoads() {
     }
-
 }
diff --git a/spring-boot-bootstrap/src/test/java/org/baeldung/LiveTest.java b/spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapIntegrationTest.java
similarity index 97%
rename from spring-boot-bootstrap/src/test/java/org/baeldung/LiveTest.java
rename to spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapIntegrationTest.java
index 5ecd4023bd..b14dc2cbd0 100644
--- a/spring-boot-bootstrap/src/test/java/org/baeldung/LiveTest.java
+++ b/spring-boot-bootstrap/src/test/java/org/baeldung/SpringBootBootstrapIntegrationTest.java
@@ -21,8 +21,8 @@ import org.springframework.http.MediaType;
 import org.springframework.test.context.junit4.SpringRunner;
 
 @RunWith(SpringRunner.class)
-@SpringBootTest(classes = { Application.class }, webEnvironment = WebEnvironment.DEFINED_PORT)
-public class LiveTest {
+@SpringBootTest(classes = Application.class, webEnvironment = WebEnvironment.DEFINED_PORT)
+public class SpringBootBootstrapIntegrationTest {
 
     @Before
     public void setUp() {
diff --git a/spring-boot/src/test/java/com/baeldung/keycloak/KeycloakConfigurationTest.java b/spring-boot/src/test/java/com/baeldung/keycloak/KeycloakConfigurationTest.java
index 8e3436a8ef..fd194cb98a 100644
--- a/spring-boot/src/test/java/com/baeldung/keycloak/KeycloakConfigurationTest.java
+++ b/spring-boot/src/test/java/com/baeldung/keycloak/KeycloakConfigurationTest.java
@@ -1,53 +1,44 @@
 package com.baeldung.keycloak;
 
-
-import org.junit.Before;
 import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.keycloak.KeycloakPrincipal;
-import org.keycloak.KeycloakSecurityContext;
-import org.keycloak.adapters.springboot.client.KeycloakSecurityContextClientRequestInterceptor;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-import org.mockito.Spy;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.mock.web.MockHttpServletRequest;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
-import org.springframework.web.context.request.RequestContextHolder;
-import org.springframework.web.context.request.ServletRequestAttributes;
 
-import static org.junit.Assert.assertNotNull;
-import static org.mockito.Mockito.when;
+import java.util.Random;
+import java.util.stream.IntStream;
+import java.util.stream.Stream;
 
-@RunWith(SpringJUnit4ClassRunner.class)
-@SpringBootTest(classes = SpringBoot.class)
 public class KeycloakConfigurationTest {
 
-    @Spy
-    private KeycloakSecurityContextClientRequestInterceptor factory;
-
-    private MockHttpServletRequest servletRequest;
-
-    @Mock
-    public KeycloakSecurityContext keycloakSecurityContext;
-
-    @Mock
-    private KeycloakPrincipal keycloakPrincipal;
-
-    @Before
-    public void setUp() {
-        MockitoAnnotations.initMocks(this);
-        servletRequest = new MockHttpServletRequest();
-        RequestContextHolder.setRequestAttributes(new ServletRequestAttributes(servletRequest));
-        servletRequest.setUserPrincipal(keycloakPrincipal);
-        when(keycloakPrincipal.getKeycloakSecurityContext()).thenReturn(keycloakSecurityContext);
-    }
+    private static final Random RANDOM = new Random();
 
     @Test
     public void testGetKeycloakSecurityContext() throws Exception {
-        assertNotNull(keycloakPrincipal.getKeycloakSecurityContext());
+        IntStream.generate(this::getResultWithSwitching)
+          .limit(10000000)
+          .average().ifPresent(System.out::println);
     }
 
- 
+    public int getResultWithoutSwitching() {
+        boolean[] gates = {false, false, false};
+        gates[RANDOM.nextInt(3)] = true;
+        int pick = RANDOM.nextInt(3);
+        return gates[pick] ? 1 : 0;
+    }
 
+    public int getResultWithSwitching() {
+        boolean[] gates = {false, false, false};
+        int win = RANDOM.nextInt(3);
+        gates[win] = true;
+        int pick = RANDOM.nextInt(3);
+        int empty = Stream.of(0, 1, 2)
+          .filter(i -> i != pick)
+          .filter(i -> !gates[i])
+          .findFirst().get();
+
+        int newPick = Stream.of(0, 1, 2)
+          .filter(i -> i != pick)
+          .filter(i -> i != empty)
+          .findFirst().get();
+
+        return gates[newPick] ? 1 : 0;
+    }
 }