refactor: remove code smell java:S5786 (#2159)

https://sonarcloud.io/organizations/iluwatar/rules?open=java%3AS5786&rule_key=java%3AS5786

cloud-claim-check-pattern/call-usage-app/src/test/java/com/iluwatar/claimcheckpattern/consumer/callcostprocessor/functions/UsageCostProcessorFunctionTest.java

@@ -58,7 +58,7 @@ import static org.mockito.Mockito.*;
  * Unit test for Function class.
  */
 @ExtendWith(MockitoExtension.class)
-public class UsageCostProcessorFunctionTest {
+class UsageCostProcessorFunctionTest {
 
     @Mock
     MessageHandlerUtility<UsageDetail> mockMessageHandlerUtilityForUsageADetail;
@@ -74,7 +74,7 @@ public class UsageCostProcessorFunctionTest {
     UsageCostProcessorFunction usageCostProcessorFunction;
 
     @BeforeEach
-    public void setUp() {
+    void setUp() {
         var messageBodyUsageDetail = new MessageBody<UsageDetail>();
         var usageDetailsList = new ArrayList<UsageDetail>();
 
@@ -122,7 +122,7 @@ public class UsageCostProcessorFunctionTest {
      * Unit test for HttpTriggerJava method.
      */
     @Test
-    public void shouldTriggerHttpAzureFunctionJavaWithSubscriptionValidationEventType() throws Exception {
+    void shouldTriggerHttpAzureFunctionJavaWithSubscriptionValidationEventType() throws Exception {
 
         // Setup
         @SuppressWarnings("unchecked")
@@ -148,7 +148,7 @@ public class UsageCostProcessorFunctionTest {
     }
 
     @Test
-    public void shouldTriggerHttpAzureFunctionJavaWithUsageDetailEventType() throws Exception {
+    void shouldTriggerHttpAzureFunctionJavaWithUsageDetailEventType() throws Exception {
         // Setup
         @SuppressWarnings("unchecked")
         final HttpRequestMessage<Optional<String>> req = mock(HttpRequestMessage.class);

cloud-claim-check-pattern/call-usage-app/src/test/java/com/iluwatar/claimcheckpattern/producer/calldetails/functions/UsageDetailPublisherFunctionTest.java

@@ -52,7 +52,7 @@ import static org.mockito.Mockito.*;
  * Unit test for Function class.
  */
 @ExtendWith(MockitoExtension.class)
-public class UsageDetailPublisherFunctionTest {
+class UsageDetailPublisherFunctionTest {
     @Mock
     MessageHandlerUtility<UsageDetail> mockMessageHandlerUtility;
     @Mock
@@ -65,7 +65,7 @@ public class UsageDetailPublisherFunctionTest {
      * Unit test for HttpTriggerJava method.
      */
     @Test
-    public void shouldTriggerHttpAzureFunctionJavaWithSubscriptionValidationEventType() throws Exception {
+    void shouldTriggerHttpAzureFunctionJavaWithSubscriptionValidationEventType() throws Exception {
 
         // Setup
         @SuppressWarnings("unchecked")
@@ -91,7 +91,7 @@ public class UsageDetailPublisherFunctionTest {
     }
 
     @Test
-    public void shouldTriggerHttpAzureFunctionJavaWithUsageDetailEventType() throws Exception {
+    void shouldTriggerHttpAzureFunctionJavaWithUsageDetailEventType() throws Exception {
 
         // Setup
         @SuppressWarnings("unchecked")

cloud-claim-check-pattern/call-usage-app/src/test/java/com/iluwatar/claimcheckpattern/utility/EventHandlerUtilityTest.java

@@ -40,7 +40,7 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 
 @ExtendWith(MockitoExtension.class)
-public class EventHandlerUtilityTest {
+class EventHandlerUtilityTest {
 
     @Mock
     EventGridPublisherClient<BinaryData> mockCustomEventClient;
@@ -49,7 +49,7 @@ public class EventHandlerUtilityTest {
     EventHandlerUtility<Message<UsageDetail>> eventHandlerUtility;
 
     @BeforeEach
-    public void setUp() {
+    void setUp() {
 
         System.setProperty("EventGridURL", "https://www.dummyEndpoint.com/api/events");
         System.setProperty("EventGridKey", "EventGridURL");

cloud-claim-check-pattern/call-usage-app/src/test/java/com/iluwatar/claimcheckpattern/utility/MessageHandlerUtilityTest.java

@@ -46,7 +46,7 @@ import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.*;
 
 @ExtendWith(MockitoExtension.class)
-public class MessageHandlerUtilityTest {
+class MessageHandlerUtilityTest {
     @Mock
     private BlobClient mockBlobClient;
 
@@ -63,7 +63,7 @@ public class MessageHandlerUtilityTest {
     private MessageReference messageReference;
 
     @BeforeEach
-    public void setUp() {
+    void setUp() {
         System.setProperty("BlobStorageConnectionString", "https://www.dummyEndpoint.com/api/blobs");
 
         var messageBody = new MessageBody<UsageDetail>();