Mark nested Junit5 tests with @Nested

Author: stIncMale

src/test/java/com/mongodb/kafka/connect/source/MongoSourceConfigTest.java

@@ -76,6 +76,7 @@
 
 import org.apache.kafka.common.config.ConfigException;
 import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 
 import org.bson.BsonTimestamp;
@@ -546,7 +547,8 @@ void testHeartbeatTopicName() {
                     .getString(HEARTBEAT_TOPIC_NAME_CONFIG)));
   }
 
-  static final class StartupModeTest {
+  @Nested
+  final class StartupModeTest {
     @Test
     void startupMode() {
       assertAll(

src/test/java/com/mongodb/kafka/connect/source/StartedMongoSourceTaskTest.java

@@ -31,6 +31,7 @@
 import org.apache.kafka.connect.storage.OffsetStorageReader;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
 
@@ -45,7 +46,8 @@
 import com.mongodb.kafka.connect.source.statistics.JmxStatisticsManager;
 
 final class StartedMongoSourceTaskTest {
-  static final class ChangeStreamIterableOptionsTest {
+  @Nested
+  final class ChangeStreamIterableOptionsTest {
     private final Map<String, String> properties = new HashMap<>();
     private StartedMongoSourceTask task;