Fix deprecation warnings

spring-session-docs/modules/ROOT/examples/java/docs/FindByIndexNameSessionRepositoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 the original author or authors.
+ * Copyright 2014-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,10 +18,10 @@ package docs;
 
 import java.util.Map;
 
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
+import org.mockito.junit.jupiter.MockitoExtension;
 
 import org.springframework.session.FindByIndexNameSessionRepository;
 import org.springframework.session.Session;
@@ -30,6 +30,7 @@ import org.springframework.session.Session;
  * @author Rob Winch
  *
  */
+@ExtendWith(MockitoExtension.class)
 class FindByIndexNameSessionRepositoryTests {
 
 	@Mock
@@ -38,11 +39,6 @@ class FindByIndexNameSessionRepositoryTests {
 	@Mock
 	Session session;
 
-	@BeforeEach
-	void setUp() {
-		MockitoAnnotations.initMocks(this);
-	}
-
 	@Test
 	void setUsername() {
 		// tag::set-username[]
@@ -52,7 +48,6 @@ class FindByIndexNameSessionRepositoryTests {
 	}
 
 	@Test
-	@SuppressWarnings("unused")
 	void findByUsername() {
 		// tag::findby-username[]
 		String username = "username";