Migrate JDBC examples to JUnit 5.

See #583.
Original pull request: #615

jdbc/basics/src/test/java/example/springdata/jdbc/basics/aggregate/AggregateTests.java

@@ -24,20 +24,20 @@ import java.util.Arrays;
 import java.util.List;
 
 import org.assertj.core.groups.Tuple;
-import org.junit.Test;
-import org.junit.runner.RunWith;
+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.data.jdbc.AutoConfigureDataJdbc;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.annotation.DirtiesContext;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
 
 /**
  * Demonstrates various possibilities to customize the behavior of a repository.
  *
  * @author Jens Schauder
  */
-@RunWith(SpringRunner.class)
 @SpringBootTest(classes = AggregateConfiguration.class)
 @AutoConfigureDataJdbc
 @DirtiesContext(classMode = DirtiesContext.ClassMode.BEFORE_EACH_TEST_METHOD)

jdbc/basics/src/test/java/example/springdata/jdbc/basics/simpleentity/SimpleEntityTests.java

@@ -15,24 +15,21 @@
  */
 package example.springdata.jdbc.basics.simpleentity;
 
-import static org.assertj.core.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
 
-import example.springdata.jdbc.basics.Output;
-import example.springdata.jdbc.basics.aggregate.AgeGroup;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureJdbc;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.junit4.SpringRunner;
+
+import example.springdata.jdbc.basics.Output;
+import example.springdata.jdbc.basics.aggregate.AgeGroup;
 
 /**
  * Demonstrates simple CRUD operations with a simple entity without any references.
  *
  * @author Jens Schauder
  */
-@RunWith(SpringRunner.class)
 @SpringBootTest(classes = CategoryConfiguration.class)
 @AutoConfigureJdbc
 public class SimpleEntityTests {

jdbc/jooq/src/test/java/example/springdata/jdbc/jooq/SimpleEntityTests.java

@@ -15,18 +15,18 @@
  */
 package example.springdata.jdbc.jooq;
 
-import static java.util.Arrays.*;
-import static org.assertj.core.api.Assertions.*;
+import static java.util.Arrays.asList;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.tuple;
 
 import java.util.List;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureJdbc;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.ComponentScan;
-import org.springframework.test.context.junit4.SpringRunner;
+
 
 /**
  * Demonstrates simple CRUD operations with a simple entity without any references.
@@ -34,7 +34,6 @@ import org.springframework.test.context.junit4.SpringRunner;
  * @author Jens Schauder
  * @author Florian Lüdiger
  */
-@RunWith(SpringRunner.class)
 @SpringBootTest(classes = CategoryConfiguration.class)
 @AutoConfigureJdbc
 @ComponentScan

jdbc/mybatis/src/test/java/example/springdata/jdbc/mybatis/MyBatisTests.java

@@ -17,20 +17,20 @@ package example.springdata.jdbc.mybatis;
 
 import static org.assertj.core.api.Assertions.*;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.mybatis.spring.boot.test.autoconfigure.MybatisTest;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureJdbc;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
 
 /**
  * Demonstrates queries can be mapped using MyBatis.
  *
  * @author Jens Schauder
  */
-@RunWith(SpringRunner.class)
+@ExtendWith(SpringExtension.class)
 @SpringBootTest(classes = MyBatisConfiguration.class)
 @AutoConfigureJdbc
 @MybatisTest