Upgrade Java 17

Issue-ID: POLICY-4803
Change-Id: Iad0d08ee6f8ab18eb177b458d8edbba4002bcc73
Signed-off-by: adheli.tavares <adheli.tavares@est.tech>

14 files changed, 294 insertions, 298 deletions

diff --git a/main/src/main/java/org/onap/policy/distribution/main/rest/DistributionRestController.java b/main/src/main/java/org/onap/policy/distribution/main/rest/DistributionRestController.java
index 702f8a2a..e9e4b04e 100644
--- a/main/src/main/java/org/onap/policy/distribution/main/rest/DistributionRestController.java
+++ b/main/src/main/java/org/onap/policy/distribution/main/rest/DistributionRestController.java
@@ -26,11 +26,11 @@ import io.swagger.annotations.ApiOperation;
 import io.swagger.annotations.Info;
 import io.swagger.annotations.SwaggerDefinition;
 import io.swagger.annotations.Tag;
-import javax.ws.rs.GET;
-import javax.ws.rs.Path;
-import javax.ws.rs.Produces;
-import javax.ws.rs.core.MediaType;
-import javax.ws.rs.core.Response;
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.Response;
 import org.onap.policy.common.endpoints.report.HealthCheckReport;
 
 /**
diff --git a/main/src/test/java/org/onap/policy/distribution/main/TestExceptions.java b/main/src/test/java/org/onap/policy/distribution/main/TestExceptions.java
index 0f5e5023..4a15506e 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/TestExceptions.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/TestExceptions.java
@@ -20,19 +20,19 @@
 
 package org.onap.policy.distribution.main;
 
-import static org.junit.Assert.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 import java.io.IOException;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class TestExceptions {
+class TestExceptions {
 
     @Test
-    public void test() {
-        assertNotNull(new PolicyDistributionException("Message"));
-        assertNotNull(new PolicyDistributionException("Message", new IOException()));
+    void test() {
+        assertDoesNotThrow(() -> new PolicyDistributionException("Message"));
+        assertDoesNotThrow(() -> new PolicyDistributionException("Message", new IOException()));
 
-        assertNotNull(new PolicyDistributionRuntimeException("Message"));
-        assertNotNull(new PolicyDistributionRuntimeException("Message", new IOException()));
+        assertDoesNotThrow(() -> new PolicyDistributionRuntimeException("Message"));
+        assertDoesNotThrow(() -> new PolicyDistributionRuntimeException("Message", new IOException()));
     }
 }
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/CommonTestData.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/CommonTestData.java
index 9f6fab5a..57fa97d1 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/parameters/CommonTestData.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/CommonTestData.java
@@ -133,6 +133,22 @@ public class CommonTestData {
     /**
      * Returns an instance of ReceptionHandlerParameters for test cases.
      *
+     * @param port the port
+     * @return the restServerParameters object
+     */
+    public RestServerParameters getRestServerParameters(final int port) {
+        final var fileName = "src/test/resources/parameters/RestServerParameters.json";
+        try {
+            var json = Files.readString(new File(fileName).toPath());
+            return coder.decode(json.replace("6969", String.valueOf(port)), RestServerParameters.class);
+        } catch (final Exception exp) {
+            throw new RuntimeException("cannot read/decode " + fileName, exp);
+        }
+    }
+
+    /**
+     * Returns an instance of ReceptionHandlerParameters for test cases.
+     *
      * @param isEmpty boolean value to represent that object created should be empty or not
      * @return the receptionHandlerParameters object
      */
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterGroup.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterGroup.java
index 0b5bfcb8..a48b0bd7 100644..100755
--- a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterGroup.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterGroup.java
@@ -23,12 +23,12 @@
 package org.onap.policy.distribution.main.parameters;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Map;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.common.endpoints.parameters.RestServerParameters;
 import org.onap.policy.common.parameters.ValidationResult;
 import org.onap.policy.distribution.main.testclasses.DummyPolicyForwarderParameterGroup;
@@ -42,25 +42,24 @@ import org.onap.policy.distribution.reception.parameters.ReceptionHandlerParamet
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestDistributionParameterGroup {
+class TestDistributionParameterGroup {
     CommonTestData commonTestData = new CommonTestData();
 
     @Test
-    public void testDistributionParameterGroup() {
-        final RestServerParameters restServerParameters = commonTestData.getRestServerParameters(false);
-        final Map<String, ReceptionHandlerParameters> receptionHandlerParameters =
-                commonTestData.getReceptionHandlerParameters(false);
-        final Map<String, ReceptionHandlerConfigurationParameterGroup> receptionHandlerConfigurations =
+    void testDistributionParameterGroup() {
+        final var restServerParameters = commonTestData.getRestServerParameters(false);
+        final var receptionHandlerParameters = commonTestData.getReceptionHandlerParameters(false);
+        final var receptionHandlerConfigurations =
                 commonTestData.getReceptionHandlerConfigurationParameters(false);
-        final Map<String, PolicyForwarderConfigurationParameterGroup> forwarderConfigurations =
+        final var forwarderConfigurations =
                 commonTestData.getPolicyForwarderConfigurationParameters(false);
-        final Map<String, PolicyDecoderConfigurationParameterGroup> decoderConfigurations =
+        final var decoderConfigurations =
                 commonTestData.getPolicyDecoderConfigurationParameters(false);
 
-        final DistributionParameterGroup distributionParameters = new DistributionParameterGroup(
+        final var distributionParameters = new DistributionParameterGroup(
                 CommonTestData.DISTRIBUTION_GROUP_NAME, restServerParameters, receptionHandlerParameters,
                 receptionHandlerConfigurations, forwarderConfigurations, decoderConfigurations);
-        final ValidationResult validationResult = distributionParameters.validate();
+        final var validationResult = distributionParameters.validate();
         assertTrue(validationResult.isValid());
         assertEquals(restServerParameters.getHost(), distributionParameters.getRestServerParameters().getHost());
         assertEquals(restServerParameters.getPort(), distributionParameters.getRestServerParameters().getPort());
@@ -100,9 +99,9 @@ public class TestDistributionParameterGroup {
     }
 
     @Test
-    public void testDistributionParameterGroup_NullName() {
-        final RestServerParameters restServerParameters = commonTestData.getRestServerParameters(false);
-        final Map<String, ReceptionHandlerParameters> receptionHandlerParameters =
+    void testDistributionParameterGroup_NullName() {
+        final var restServerParameters = commonTestData.getRestServerParameters(false);
+        final var receptionHandlerParameters =
                 commonTestData.getReceptionHandlerParameters(false);
         final Map<String, ReceptionHandlerConfigurationParameterGroup> receptionHandlerConfigurations =
                 commonTestData.getReceptionHandlerConfigurationParameters(false);
@@ -116,7 +115,7 @@ public class TestDistributionParameterGroup {
                         receptionHandlerConfigurations, forwarderConfigurations, decoderConfigurations);
         final ValidationResult validationResult = distributionParameters.validate();
         assertFalse(validationResult.isValid());
-        assertEquals(null, distributionParameters.getName());
+        assertThat(distributionParameters.getName()).isNull();
         assertEquals(
                 receptionHandlerParameters.get(CommonTestData.DUMMY_RECEPTION_HANDLER_KEY).getReceptionHandlerType(),
                 distributionParameters.getReceptionHandlerParameters().get(CommonTestData.DUMMY_RECEPTION_HANDLER_KEY)
@@ -134,7 +133,7 @@ public class TestDistributionParameterGroup {
     }
 
     @Test
-    public void testDistributionParameterGroup_EmptyName() {
+    void testDistributionParameterGroup_EmptyName() {
         final RestServerParameters restServerParameters = commonTestData.getRestServerParameters(false);
         final Map<String, ReceptionHandlerParameters> receptionHandlerParameters =
                 commonTestData.getReceptionHandlerParameters(false);
@@ -168,7 +167,7 @@ public class TestDistributionParameterGroup {
     }
 
     @Test
-    public void testDistributionParameterGroup_NullReceptionHandlerParameters() {
+    void testDistributionParameterGroup_NullReceptionHandlerParameters() {
         final RestServerParameters restServerParameters = commonTestData.getRestServerParameters(false);
         final Map<String, ReceptionHandlerConfigurationParameterGroup> receptionHandlerConfigurations =
                 commonTestData.getReceptionHandlerConfigurationParameters(false);
@@ -184,7 +183,7 @@ public class TestDistributionParameterGroup {
     }
 
     @Test
-    public void testDistributionParameterGroup_EmptyReceptionHandlerParameters() {
+    void testDistributionParameterGroup_EmptyReceptionHandlerParameters() {
         final RestServerParameters restServerParameters = commonTestData.getRestServerParameters(false);
         final Map<String, ReceptionHandlerParameters> receptionHandlerParameters =
                 commonTestData.getReceptionHandlerParameters(true);
@@ -204,7 +203,7 @@ public class TestDistributionParameterGroup {
     }
 
     @Test
-    public void testDistributionParameterGroup_EmptyRestServerParameters() {
+    void testDistributionParameterGroup_EmptyRestServerParameters() {
         final RestServerParameters restServerParameters = commonTestData.getRestServerParameters(true);
         final Map<String, ReceptionHandlerParameters> receptionHandlerParameters =
                 commonTestData.getReceptionHandlerParameters(false);
@@ -224,7 +223,7 @@ public class TestDistributionParameterGroup {
     }
 
     @Test
-    public void testDistributionParameterGroup_NullRestServerParameters() {
+    void testDistributionParameterGroup_NullRestServerParameters() {
         final RestServerParameters restServerParameters = null;
         final Map<String, ReceptionHandlerParameters> receptionHandlerParameters =
                 commonTestData.getReceptionHandlerParameters(false);
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterHandler.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterHandler.java
index b83b3fc9..697cdd64 100644..100755
--- a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterHandler.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestDistributionParameterHandler.java
@@ -23,13 +23,13 @@
 package org.onap.policy.distribution.main.parameters;
 
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.common.utils.cmd.CommandLineException;
 import org.onap.policy.distribution.main.PolicyDistributionException;
 import org.onap.policy.distribution.main.startstop.DistributionCommandLineArguments;
@@ -41,20 +41,20 @@ import org.onap.policy.distribution.main.testclasses.DummyPolicyForwarderParamet
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestDistributionParameterHandler {
+class TestDistributionParameterHandler {
     @Test
-    public void testParameterHandlerNoParameterFile() throws PolicyDistributionException, CommandLineException {
+    void testParameterHandlerNoParameterFile() throws PolicyDistributionException, CommandLineException {
         verifyFailure("NoParameterFile.json", PolicyDistributionException.class, "FileNotFoundException");
     }
 
     @Test
-    public void testParameterHandlerEmptyParameters() throws PolicyDistributionException, CommandLineException {
+    void testParameterHandlerEmptyParameters() throws PolicyDistributionException, CommandLineException {
         verifyFailure("EmptyParameters.json", PolicyDistributionException.class,
                 "no parameters found in \"parameters/EmptyParameters.json\"");
     }
 
     @Test
-    public void testParameterHandlerBadParameters() throws PolicyDistributionException, CommandLineException {
+    void testParameterHandlerBadParameters() throws PolicyDistributionException, CommandLineException {
         verifyFailure("BadParameters.json", PolicyDistributionException.class,
                 "error reading parameters from \"parameters/BadParameters.json\"\n"
                         + "(JsonSyntaxException):java.lang.IllegalStateException: "
@@ -62,7 +62,7 @@ public class TestDistributionParameterHandler {
     }
 
     @Test
-    public void testParameterHandlerInvalidParameters() throws PolicyDistributionException, CommandLineException {
+    void testParameterHandlerInvalidParameters() throws PolicyDistributionException, CommandLineException {
         verifyFailure("InvalidParameters.json", PolicyDistributionException.class,
                 "error reading parameters from \"parameters/InvalidParameters.json\"\n"
                         + "(JsonSyntaxException):java.lang.IllegalStateException: "
@@ -70,30 +70,30 @@ public class TestDistributionParameterHandler {
     }
 
     @Test
-    public void testParameterHandlerNoParameters() throws PolicyDistributionException, CommandLineException {
+    void testParameterHandlerNoParameters() throws PolicyDistributionException, CommandLineException {
         verifyFailure("NoParameters.json", PolicyDistributionException.class,
                 "\"receptionHandlerParameters\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testParameterHandlerMinumumParameters() throws PolicyDistributionException, CommandLineException {
+    void testParameterHandlerMinumumParameters() throws PolicyDistributionException, CommandLineException {
         final String[] minArgumentString = {"-c", "parameters/MinimumParameters.json"};
 
-        final DistributionCommandLineArguments minArguments = new DistributionCommandLineArguments();
+        final var minArguments = new DistributionCommandLineArguments();
         minArguments.parse(minArgumentString);
 
-        final DistributionParameterGroup parGroup = new DistributionParameterHandler().getParameters(minArguments);
+        final var parGroup = new DistributionParameterHandler().getParameters(minArguments);
         assertEquals(CommonTestData.DISTRIBUTION_GROUP_NAME, parGroup.getName());
     }
 
     @Test
-    public void testDistributionParameterGroup() throws PolicyDistributionException, CommandLineException {
+    void testDistributionParameterGroup() throws PolicyDistributionException, CommandLineException {
         final String[] distributionConfigParameters = {"-c", "parameters/DistributionConfigParameters.json"};
 
-        final DistributionCommandLineArguments arguments = new DistributionCommandLineArguments();
+        final var arguments = new DistributionCommandLineArguments();
         arguments.parse(distributionConfigParameters);
 
-        final DistributionParameterGroup parGroup = new DistributionParameterHandler().getParameters(arguments);
+        final var parGroup = new DistributionParameterHandler().getParameters(arguments);
         assertTrue(arguments.checkSetConfigurationFilePath());
         assertEquals(CommonTestData.DISTRIBUTION_GROUP_NAME, parGroup.getName());
         assertEquals(CommonTestData.RECEPTION_HANDLER_TYPE, parGroup.getReceptionHandlerParameters()
@@ -118,14 +118,14 @@ public class TestDistributionParameterHandler {
     }
 
     @Test
-    public void testDistributionParameterGroup_InvalidForwarderConfigurationClassName()
+    void testDistributionParameterGroup_InvalidForwarderConfigurationClassName()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_InvalidForwarderConfigurationClassName.json",
                 PolicyDistributionException.class, "parameter \"parameterClassName\" value \"\" invalid in JSON file");
     }
 
     @Test
-    public void testDistributionParameterGroup_UnknownForwarderConfigurationClassName()
+    void testDistributionParameterGroup_UnknownForwarderConfigurationClassName()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_UnknownForwarderConfigurationClassName.json",
                 PolicyDistributionException.class,
@@ -133,58 +133,58 @@ public class TestDistributionParameterHandler {
     }
 
     @Test
-    public void testDistributionParameterGroup_InvalidName() throws PolicyDistributionException, CommandLineException {
+    void testDistributionParameterGroup_InvalidName() throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_InvalidName.json", PolicyDistributionException.class,
                 "\"name\" value \" \" INVALID, is blank");
     }
 
     @Test
-    public void testDistributionParameterGroup_NoReceptionHandler()
+    void testDistributionParameterGroup_NoReceptionHandler()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_NoReceptionHandler.json", PolicyDistributionException.class,
                 "\"receptionHandlerParameters\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testDistributionParameterGroup_EmptyReceptionHandler()
+    void testDistributionParameterGroup_EmptyReceptionHandler()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_EmptyReceptionHandler.json", PolicyDistributionException.class,
                 "\"receptionHandlerParameters\" value \"{}\" INVALID, minimum number of elements: 1");
     }
 
     @Test
-    public void testDistributionParameterGroup_NoPolicyDecoder()
+    void testDistributionParameterGroup_NoPolicyDecoder()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_NoPolicyDecoder.json", PolicyDistributionException.class,
                 "\"policyDecoders\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testDistributionParameterGroup_NoPolicyForwarder()
+    void testDistributionParameterGroup_NoPolicyForwarder()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_NoPolicyForwarder.json", PolicyDistributionException.class,
                 "\"policyForwarderConfigurationParameters\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testDistributionParameterGroup_EmptyPolicyDecoder()
+    void testDistributionParameterGroup_EmptyPolicyDecoder()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_EmptyPolicyDecoder.json", PolicyDistributionException.class,
                 "\"policyDecoders\" value \"{}\" INVALID, minimum number of elements: 1");
     }
 
     @Test
-    public void testDistributionParameterGroup_EmptyPolicyForwarder()
+    void testDistributionParameterGroup_EmptyPolicyForwarder()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_EmptyPolicyForwarder.json", PolicyDistributionException.class,
                 "\"policyForwarders\" value \"{}\" INVALID, minimum number of elements: 1");
     }
 
     @Test
-    public void testDistributionParameterGroup_InvalidReceptionHandlerParameters()
+    void testDistributionParameterGroup_InvalidReceptionHandlerParameters()
             throws PolicyDistributionException, IOException, CommandLineException {
 
-        String resultString = Files
+        var resultString = Files
                 .readString(
                         Paths.get("src/test/resources/expectedValidationResults/InvalidReceptionHandlerParameters.txt"))
                 .trim().replaceAll("\\r\\n", "\\\n");
@@ -194,77 +194,77 @@ public class TestDistributionParameterHandler {
     }
 
     @Test
-    public void testDistributionParameterGroup_InvalidDecoderAndForwarderParameters()
+    void testDistributionParameterGroup_InvalidDecoderAndForwarderParameters()
             throws PolicyDistributionException, IOException, CommandLineException {
 
-        String resultString = new String(Files
+        var resultString = Files
                 .readString(Paths
                         .get("src/test/resources/expectedValidationResults/InvalidDecoderAndForwarderParameters.txt"))
-                .trim().replaceAll("\\r\\n", "\\\n"));
+                .trim().replaceAll("\\r\\n", "\\\n");
 
         verifyFailure("DistributionConfigParameters_InvalidDecoderAndForwarderParameters.json",
                 PolicyDistributionException.class, resultString);
     }
 
     @Test
-    public void testDistributionParameterGroup_InvalidRestServerParameters()
+    void testDistributionParameterGroup_InvalidRestServerParameters()
             throws PolicyDistributionException, IOException, CommandLineException {
 
-        String resultString = new String(Files
+        var resultString = Files
                 .readString(Paths.get("src/test/resources/expectedValidationResults/InvalidRestServerParameters.txt"))
-                .trim().replaceAll("\\r\\n", "\\\n"));
+                .trim().replaceAll("\\r\\n", "\\\n");
 
         verifyFailure("DistributionConfigParameters_InvalidRestServerParameters.json",
                 PolicyDistributionException.class, resultString);
     }
 
     @Test
-    public void testDistributionVersion() throws PolicyDistributionException, CommandLineException {
+    void testDistributionVersion() throws PolicyDistributionException, CommandLineException {
         final String[] distributionConfigParameters = {"-v"};
-        final DistributionCommandLineArguments arguments = new DistributionCommandLineArguments();
-        final String version = arguments.parse(distributionConfigParameters);
+        final var arguments = new DistributionCommandLineArguments();
+        final var version = arguments.parse(distributionConfigParameters);
         assertTrue(version.startsWith("ONAP Policy Framework Distribution Service"));
     }
 
     @Test
-    public void testDistributionHelp() throws PolicyDistributionException, CommandLineException {
+    void testDistributionHelp() throws PolicyDistributionException, CommandLineException {
         final String[] distributionConfigParameters = {"-h"};
-        final DistributionCommandLineArguments arguments = new DistributionCommandLineArguments();
-        final String help = arguments.parse(distributionConfigParameters);
+        final var arguments = new DistributionCommandLineArguments();
+        final var help = arguments.parse(distributionConfigParameters);
         assertTrue(help.startsWith("usage:"));
     }
 
     @Test
-    public void testDistributionInvalidOption() throws PolicyDistributionException {
+    void testDistributionInvalidOption() throws PolicyDistributionException {
         final String[] distributionConfigParameters = {"-d"};
-        final DistributionCommandLineArguments arguments = new DistributionCommandLineArguments();
+        final var arguments = new DistributionCommandLineArguments();
         assertThatThrownBy(() -> arguments.parse(distributionConfigParameters))
                 .hasMessageContaining("invalid command line arguments specified");
     }
 
     @Test
-    public void testDistributionParameterGroup_InvalidReceptionHandlerClass()
+    void testDistributionParameterGroup_InvalidReceptionHandlerClass()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_InvalidReceptionHandlerClass.json",
                 PolicyDistributionException.class, "could not find class");
     }
 
     @Test
-    public void testDistributionParameterGroup_EmptyReceptionHandlerClass()
+    void testDistributionParameterGroup_EmptyReceptionHandlerClass()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_EmptyReceptionHandlerClass.json", PolicyDistributionException.class,
                 "invalid in JSON file");
     }
 
     @Test
-    public void testDistributionParameterGroup_InvalidDecoderConfigurationClassName()
+    void testDistributionParameterGroup_InvalidDecoderConfigurationClassName()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_InvalidDecoderConfigurationClassName.json",
                 PolicyDistributionException.class, "parameter \"parameterClassName\" value \"\" invalid in JSON file");
     }
 
     @Test
-    public void testDistributionParameterGroup_UnknownDecoderConfigurationClassName()
+    void testDistributionParameterGroup_UnknownDecoderConfigurationClassName()
             throws PolicyDistributionException, CommandLineException {
         verifyFailure("DistributionConfigParameters_UnknownDecoderConfigurationClassName.json",
                 PolicyDistributionException.class,
@@ -275,10 +275,10 @@ public class TestDistributionParameterHandler {
             throws PolicyDistributionException, CommandLineException {
         final String[] distributionConfigParameters = {"-c", "parameters/" + fileName};
 
-        final DistributionCommandLineArguments arguments = new DistributionCommandLineArguments();
+        final var arguments = new DistributionCommandLineArguments();
         arguments.parse(distributionConfigParameters);
 
-        DistributionParameterHandler paramHandler = new DistributionParameterHandler();
+        var paramHandler = new DistributionParameterHandler();
 
         assertThatThrownBy(() -> paramHandler.getParameters(arguments)).isInstanceOf(clazz)
                 .hasMessageContaining(expectedMessage);
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPluginHandlerParameters.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPluginHandlerParameters.java
index 9def403d..e7a15902 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPluginHandlerParameters.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPluginHandlerParameters.java
@@ -23,31 +23,27 @@
 package org.onap.policy.distribution.main.parameters;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import java.util.Map;
-import org.junit.Test;
-import org.onap.policy.common.parameters.ValidationResult;
-import org.onap.policy.distribution.forwarding.parameters.PolicyForwarderParameters;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.distribution.reception.parameters.PluginHandlerParameters;
-import org.onap.policy.distribution.reception.parameters.PolicyDecoderParameters;
 
 /**
  * Class to perform unit test of PluginHandlerParameters.
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestPluginHandlerParameters {
+class TestPluginHandlerParameters {
     CommonTestData commonTestData = new CommonTestData();
 
     @Test
-    public void testPluginHandlerParameters() {
-        final Map<String, PolicyDecoderParameters> policyDecoders = commonTestData.getPolicyDecoders(false);
-        final Map<String, PolicyForwarderParameters> policyForwarders = commonTestData.getPolicyForwarders(false);
-        final PluginHandlerParameters pHParameters = new PluginHandlerParameters(policyDecoders, policyForwarders);
-        final ValidationResult validationResult = pHParameters.validate();
+    void testPluginHandlerParameters() {
+        final var policyDecoders = commonTestData.getPolicyDecoders(false);
+        final var policyForwarders = commonTestData.getPolicyForwarders(false);
+        final var pHParameters = new PluginHandlerParameters(policyDecoders, policyForwarders);
+        final var validationResult = pHParameters.validate();
         assertEquals(policyDecoders.get(CommonTestData.DUMMY_DECODER_KEY),
                         pHParameters.getPolicyDecoders().get(CommonTestData.DUMMY_DECODER_KEY));
         assertEquals(policyForwarders.get(CommonTestData.DUMMY_ENGINE_FORWARDER_KEY),
@@ -56,36 +52,36 @@ public class TestPluginHandlerParameters {
     }
 
     @Test
-    public void testPluginHandlerParameters_NullPolicyDecoders() {
-        final Map<String, PolicyForwarderParameters> policyForwarders = commonTestData.getPolicyForwarders(false);
-        final PluginHandlerParameters pHParameters = new PluginHandlerParameters(null, policyForwarders);
+    void testPluginHandlerParameters_NullPolicyDecoders() {
+        final var policyForwarders = commonTestData.getPolicyForwarders(false);
+        final var pHParameters = new PluginHandlerParameters(null, policyForwarders);
         assertThat(pHParameters.validate().getResult()).contains("\"policyDecoders\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testPluginHandlerParameters_NullPolicyForwarders() {
-        final Map<String, PolicyDecoderParameters> policyDecoders = commonTestData.getPolicyDecoders(false);
-        final PluginHandlerParameters pHParameters = new PluginHandlerParameters(policyDecoders, null);
+    void testPluginHandlerParameters_NullPolicyForwarders() {
+        final var policyDecoders = commonTestData.getPolicyDecoders(false);
+        final var pHParameters = new PluginHandlerParameters(policyDecoders, null);
         assertThat(pHParameters.validate().getResult())
                         .contains("\"policyForwarders\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testPluginHandlerParameters_EmptyPolicyDecoders() {
-        final Map<String, PolicyDecoderParameters> policyDecoders = commonTestData.getPolicyDecoders(true);
-        final Map<String, PolicyForwarderParameters> policyForwarders = commonTestData.getPolicyForwarders(false);
-        final PluginHandlerParameters pHParameters = new PluginHandlerParameters(policyDecoders, policyForwarders);
-        ValidationResult result = pHParameters.validate();
+    void testPluginHandlerParameters_EmptyPolicyDecoders() {
+        final var policyDecoders = commonTestData.getPolicyDecoders(true);
+        final var policyForwarders = commonTestData.getPolicyForwarders(false);
+        final var pHParameters = new PluginHandlerParameters(policyDecoders, policyForwarders);
+        var result = pHParameters.validate();
         assertFalse(result.isValid());
         assertThat(pHParameters.validate().getResult()).contains("\"policyDecoders\"", "minimum");
     }
 
     @Test
-    public void testPluginHandlerParameters_EmptyPolicyForwarders() {
-        final Map<String, PolicyForwarderParameters> policyForwarders = commonTestData.getPolicyForwarders(true);
-        final Map<String, PolicyDecoderParameters> policyDecoders = commonTestData.getPolicyDecoders(false);
-        final PluginHandlerParameters pHParameters = new PluginHandlerParameters(policyDecoders, policyForwarders);
-        ValidationResult result = pHParameters.validate();
+    void testPluginHandlerParameters_EmptyPolicyForwarders() {
+        final var policyForwarders = commonTestData.getPolicyForwarders(true);
+        final var policyDecoders = commonTestData.getPolicyDecoders(false);
+        final var pHParameters = new PluginHandlerParameters(policyDecoders, policyForwarders);
+        var result = pHParameters.validate();
         assertFalse(result.isValid());
         assertThat(pHParameters.validate().getResult()).contains("\"policyForwarders\"", "minimum");
     }
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyDecoderParameters.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyDecoderParameters.java
index 4195f1b6..74b8c213 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyDecoderParameters.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyDecoderParameters.java
@@ -22,15 +22,14 @@
 package org.onap.policy.distribution.main.parameters;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.onap.policy.distribution.main.parameters.CommonTestData.DECODER_CLASS_NAME;
 import static org.onap.policy.distribution.main.parameters.CommonTestData.DECODER_CONFIGURATION_PARAMETERS;
 import static org.onap.policy.distribution.main.parameters.CommonTestData.DECODER_TYPE;
 
-import org.junit.Test;
-import org.onap.policy.common.parameters.ValidationResult;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.distribution.reception.parameters.PolicyDecoderParameters;
 
 /**
@@ -38,13 +37,13 @@ import org.onap.policy.distribution.reception.parameters.PolicyDecoderParameters
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestPolicyDecoderParameters {
+class TestPolicyDecoderParameters {
 
     @Test
-    public void testPolicyDecoderParameters() {
-        final PolicyDecoderParameters pDParameters =
+    void testPolicyDecoderParameters() {
+        final var pDParameters =
                 new PolicyDecoderParameters(DECODER_TYPE, DECODER_CLASS_NAME, DECODER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pDParameters.validate();
+        final var validationResult = pDParameters.validate();
         assertEquals(DECODER_TYPE, pDParameters.getDecoderType());
         assertEquals(DECODER_CLASS_NAME, pDParameters.getDecoderClassName());
         assertEquals(DECODER_CONFIGURATION_PARAMETERS, pDParameters.getDecoderConfigurationName());
@@ -52,10 +51,10 @@ public class TestPolicyDecoderParameters {
     }
 
     @Test
-    public void testPolicyDecoderParameters_InvalidDecoderType() {
-        final PolicyDecoderParameters pDParameters =
+    void testPolicyDecoderParameters_InvalidDecoderType() {
+        final var pDParameters =
                 new PolicyDecoderParameters("", DECODER_CLASS_NAME, DECODER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pDParameters.validate();
+        final var validationResult = pDParameters.validate();
         assertEquals("", pDParameters.getDecoderType());
         assertEquals(DECODER_CLASS_NAME, pDParameters.getDecoderClassName());
         assertFalse(validationResult.isValid());
@@ -63,10 +62,10 @@ public class TestPolicyDecoderParameters {
     }
 
     @Test
-    public void testPolicyDecoderParameters_InvalidDecoderClassName() {
-        final PolicyDecoderParameters pDParameters =
+    void testPolicyDecoderParameters_InvalidDecoderClassName() {
+        final var pDParameters =
                 new PolicyDecoderParameters(DECODER_TYPE, "", DECODER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pDParameters.validate();
+        final var validationResult = pDParameters.validate();
         assertEquals(DECODER_TYPE, pDParameters.getDecoderType());
         assertEquals("", pDParameters.getDecoderClassName());
         assertFalse(validationResult.isValid());
@@ -74,10 +73,10 @@ public class TestPolicyDecoderParameters {
     }
 
     @Test
-    public void testPolicyDecoderParameters_InvalidDecoderTypeAndClassName() {
-        final PolicyDecoderParameters pDParameters =
+    void testPolicyDecoderParameters_InvalidDecoderTypeAndClassName() {
+        final var pDParameters =
                 new PolicyDecoderParameters("", "", DECODER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pDParameters.validate();
+        final var validationResult = pDParameters.validate();
         assertEquals("", pDParameters.getDecoderType());
         assertEquals("", pDParameters.getDecoderClassName());
         assertFalse(validationResult.isValid());
@@ -86,32 +85,32 @@ public class TestPolicyDecoderParameters {
     }
 
     @Test
-    public void testPolicyDecoderParameters_NullDecoderType() {
-        final PolicyDecoderParameters pDParameters =
+    void testPolicyDecoderParameters_NullDecoderType() {
+        final var pDParameters =
                 new PolicyDecoderParameters(null, DECODER_CLASS_NAME, DECODER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pDParameters.validate();
-        assertEquals(null, pDParameters.getDecoderType());
+        final var validationResult = pDParameters.validate();
+        assertThat(pDParameters.getDecoderType()).isNull();
         assertEquals(DECODER_CLASS_NAME, pDParameters.getDecoderClassName());
         assertFalse(validationResult.isValid());
         assertThat(validationResult.getResult()).contains("\"decoderType\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testPolicyDecoderParameters_NullDecoderClassName() {
-        final PolicyDecoderParameters pDParameters =
+    void testPolicyDecoderParameters_NullDecoderClassName() {
+        final var pDParameters =
                 new PolicyDecoderParameters(DECODER_TYPE, null, DECODER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pDParameters.validate();
+        final var validationResult = pDParameters.validate();
         assertEquals(DECODER_TYPE, pDParameters.getDecoderType());
-        assertEquals(null, pDParameters.getDecoderClassName());
+        assertThat(pDParameters.getDecoderClassName()).isNull();
         assertFalse(validationResult.isValid());
         assertThat(validationResult.getResult()).contains("\"decoderClassName\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testPolicyDecoderParameters_InvalidDecoderClass() {
-        final PolicyDecoderParameters pDParameters = new PolicyDecoderParameters(DECODER_TYPE,
+    void testPolicyDecoderParameters_InvalidDecoderClass() {
+        final var pDParameters = new PolicyDecoderParameters(DECODER_TYPE,
                 DECODER_CLASS_NAME + "Invalid", DECODER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pDParameters.validate();
+        final var validationResult = pDParameters.validate();
         assertEquals(DECODER_TYPE, pDParameters.getDecoderType());
         assertEquals(DECODER_CLASS_NAME + "Invalid", pDParameters.getDecoderClassName());
         assertFalse(validationResult.isValid());
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyForwarderParameters.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyForwarderParameters.java
index 5dc1b448..b088194e 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyForwarderParameters.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestPolicyForwarderParameters.java
@@ -22,14 +22,14 @@
 package org.onap.policy.distribution.main.parameters;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.onap.policy.distribution.main.parameters.CommonTestData.FORWARDER_CLASS_NAME;
 import static org.onap.policy.distribution.main.parameters.CommonTestData.FORWARDER_CONFIGURATION_PARAMETERS;
 import static org.onap.policy.distribution.main.parameters.CommonTestData.FORWARDER_TYPE;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.common.parameters.ValidationResult;
 import org.onap.policy.distribution.forwarding.parameters.PolicyForwarderParameters;
 
@@ -38,23 +38,23 @@ import org.onap.policy.distribution.forwarding.parameters.PolicyForwarderParamet
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestPolicyForwarderParameters {
+class TestPolicyForwarderParameters {
 
     @Test
-    public void testPolicyForwarderParameters() {
-        final PolicyForwarderParameters pFParameters =
+    void testPolicyForwarderParameters() {
+        final var pFParameters =
                 new PolicyForwarderParameters(FORWARDER_TYPE, FORWARDER_CLASS_NAME, FORWARDER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pFParameters.validate();
+        final var validationResult = pFParameters.validate();
         assertEquals(FORWARDER_TYPE, pFParameters.getForwarderType());
         assertEquals(FORWARDER_CLASS_NAME, pFParameters.getForwarderClassName());
         assertTrue(validationResult.isValid());
     }
 
     @Test
-    public void testPolicyForwarderParameters_InvalidForwarderType() {
-        final PolicyForwarderParameters pFParameters =
+    void testPolicyForwarderParameters_InvalidForwarderType() {
+        final var pFParameters =
                 new PolicyForwarderParameters("", FORWARDER_CLASS_NAME, FORWARDER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pFParameters.validate();
+        final var validationResult = pFParameters.validate();
         assertEquals("", pFParameters.getForwarderType());
         assertEquals(FORWARDER_CLASS_NAME, pFParameters.getForwarderClassName());
         assertFalse(validationResult.isValid());
@@ -62,10 +62,10 @@ public class TestPolicyForwarderParameters {
     }
 
     @Test
-    public void testPolicyForwarderParameters_InvalidForwarderClassName() {
-        final PolicyForwarderParameters pFParameters =
+    void testPolicyForwarderParameters_InvalidForwarderClassName() {
+        final var pFParameters =
                 new PolicyForwarderParameters(FORWARDER_TYPE, "", FORWARDER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pFParameters.validate();
+        final var validationResult = pFParameters.validate();
         assertEquals(CommonTestData.FORWARDER_TYPE, pFParameters.getForwarderType());
         assertEquals("", pFParameters.getForwarderClassName());
         assertFalse(validationResult.isValid());
@@ -73,10 +73,10 @@ public class TestPolicyForwarderParameters {
     }
 
     @Test
-    public void testPolicyForwarderParameters_InvalidForwarderTypeAndClassName() {
-        final PolicyForwarderParameters pFParameters =
+    void testPolicyForwarderParameters_InvalidForwarderTypeAndClassName() {
+        final var pFParameters =
                 new PolicyForwarderParameters("", "", FORWARDER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pFParameters.validate();
+        final var validationResult = pFParameters.validate();
         assertEquals("", pFParameters.getForwarderType());
         assertEquals("", pFParameters.getForwarderClassName());
         assertFalse(validationResult.isValid());
@@ -85,32 +85,32 @@ public class TestPolicyForwarderParameters {
     }
 
     @Test
-    public void testPolicyForwarderParameters_NullForwarderType() {
-        final PolicyForwarderParameters pFParameters =
+    void testPolicyForwarderParameters_NullForwarderType() {
+        final var pFParameters =
                 new PolicyForwarderParameters(null, FORWARDER_CLASS_NAME, FORWARDER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pFParameters.validate();
-        assertEquals(null, pFParameters.getForwarderType());
+        final var validationResult = pFParameters.validate();
+        assertThat(pFParameters.getForwarderType()).isNull();
         assertEquals(FORWARDER_CLASS_NAME, pFParameters.getForwarderClassName());
         assertFalse(validationResult.isValid());
         assertThat(validationResult.getResult()).contains("\"forwarderType\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testPolicyForwarderParameters_NullForwarderClassName() {
-        final PolicyForwarderParameters pFParameters =
+    void testPolicyForwarderParameters_NullForwarderClassName() {
+        final var pFParameters =
                 new PolicyForwarderParameters(FORWARDER_TYPE, null, FORWARDER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pFParameters.validate();
+        final var validationResult = pFParameters.validate();
         assertEquals(FORWARDER_TYPE, pFParameters.getForwarderType());
-        assertEquals(null, pFParameters.getForwarderClassName());
+        assertThat(pFParameters.getForwarderClassName()).isNull();
         assertFalse(validationResult.isValid());
         assertThat(validationResult.getResult()).contains("\"forwarderClassName\" value \"null\" INVALID, is null");
     }
 
     @Test
-    public void testPolicyForwarderParameters_InvalidForwarderClass() {
-        final PolicyForwarderParameters pFParameters = new PolicyForwarderParameters(FORWARDER_TYPE,
+    void testPolicyForwarderParameters_InvalidForwarderClass() {
+        final var pFParameters = new PolicyForwarderParameters(FORWARDER_TYPE,
                 FORWARDER_CLASS_NAME + "Invalid", FORWARDER_CONFIGURATION_PARAMETERS);
-        final ValidationResult validationResult = pFParameters.validate();
+        final var validationResult = pFParameters.validate();
         assertEquals(FORWARDER_TYPE, pFParameters.getForwarderType());
         assertEquals(FORWARDER_CLASS_NAME + "Invalid", pFParameters.getForwarderClassName());
         assertFalse(validationResult.isValid());
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestReceptionHandlerParameters.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestReceptionHandlerParameters.java
index c02b96bc..41a82bca 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestReceptionHandlerParameters.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestReceptionHandlerParameters.java
@@ -22,13 +22,11 @@
 package org.onap.policy.distribution.main.parameters;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import org.junit.Test;
-import org.onap.policy.common.parameters.ValidationResult;
-import org.onap.policy.distribution.reception.parameters.PluginHandlerParameters;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.distribution.reception.parameters.ReceptionHandlerParameters;
 
 /**
@@ -36,16 +34,16 @@ import org.onap.policy.distribution.reception.parameters.ReceptionHandlerParamet
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestReceptionHandlerParameters {
+class TestReceptionHandlerParameters {
     CommonTestData commonTestData = new CommonTestData();
 
     @Test
-    public void testReceptionHandlerParameters() {
-        final PluginHandlerParameters pHParameters = commonTestData.getPluginHandlerParameters(false);
-        final ReceptionHandlerParameters rHParameters = new ReceptionHandlerParameters(
+    void testReceptionHandlerParameters() {
+        final var pHParameters = commonTestData.getPluginHandlerParameters(false);
+        final var rHParameters = new ReceptionHandlerParameters(
                 CommonTestData.RECEPTION_HANDLER_TYPE, CommonTestData.RECEPTION_HANDLER_CLASS_NAME,
                 CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS, pHParameters);
-        final ValidationResult validationResult = rHParameters.validate();
+        final var validationResult = rHParameters.validate();
         assertEquals(CommonTestData.RECEPTION_HANDLER_TYPE, rHParameters.getReceptionHandlerType());
         assertEquals(CommonTestData.RECEPTION_HANDLER_CLASS_NAME, rHParameters.getReceptionHandlerClassName());
         assertEquals(CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS,
@@ -55,13 +53,13 @@ public class TestReceptionHandlerParameters {
     }
 
     @Test
-    public void testReceptionHandlerParameters_NullReceptionHandlerType() {
-        final PluginHandlerParameters pHParameters = commonTestData.getPluginHandlerParameters(false);
-        final ReceptionHandlerParameters rHParameters =
+    void testReceptionHandlerParameters_NullReceptionHandlerType() {
+        final var pHParameters = commonTestData.getPluginHandlerParameters(false);
+        final var rHParameters =
                 new ReceptionHandlerParameters(null, CommonTestData.RECEPTION_HANDLER_CLASS_NAME,
                         CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS, pHParameters);
-        final ValidationResult validationResult = rHParameters.validate();
-        assertEquals(null, rHParameters.getReceptionHandlerType());
+        final var validationResult = rHParameters.validate();
+        assertThat(rHParameters.getReceptionHandlerType()).isNull();
         assertEquals(CommonTestData.RECEPTION_HANDLER_CLASS_NAME, rHParameters.getReceptionHandlerClassName());
         assertEquals(CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS,
                 rHParameters.getReceptionHandlerConfigurationName());
@@ -71,14 +69,14 @@ public class TestReceptionHandlerParameters {
     }
 
     @Test
-    public void testReceptionHandlerParameters_NullReceptionHandlerClassName() {
-        final PluginHandlerParameters pHParameters = commonTestData.getPluginHandlerParameters(false);
-        final ReceptionHandlerParameters rHParameters =
+    void testReceptionHandlerParameters_NullReceptionHandlerClassName() {
+        final var pHParameters = commonTestData.getPluginHandlerParameters(false);
+        final var rHParameters =
                 new ReceptionHandlerParameters(CommonTestData.RECEPTION_HANDLER_TYPE, null,
                         CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS, pHParameters);
-        final ValidationResult validationResult = rHParameters.validate();
+        final var validationResult = rHParameters.validate();
         assertEquals(CommonTestData.RECEPTION_HANDLER_TYPE, rHParameters.getReceptionHandlerType());
-        assertEquals(null, rHParameters.getReceptionHandlerClassName());
+        assertThat(rHParameters.getReceptionHandlerClassName()).isNull();
         assertEquals(CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS,
                 rHParameters.getReceptionHandlerConfigurationName());
         assertEquals(pHParameters, rHParameters.getPluginHandlerParameters());
@@ -88,12 +86,12 @@ public class TestReceptionHandlerParameters {
     }
 
     @Test
-    public void testReceptionHandlerParameters_EmptyReceptionHandlerType() {
-        final PluginHandlerParameters pHParameters = commonTestData.getPluginHandlerParameters(false);
-        final ReceptionHandlerParameters rHParameters =
+    void testReceptionHandlerParameters_EmptyReceptionHandlerType() {
+        final var pHParameters = commonTestData.getPluginHandlerParameters(false);
+        final var rHParameters =
                 new ReceptionHandlerParameters("", CommonTestData.RECEPTION_HANDLER_CLASS_NAME,
                         CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS, pHParameters);
-        final ValidationResult validationResult = rHParameters.validate();
+        final var validationResult = rHParameters.validate();
         assertEquals("", rHParameters.getReceptionHandlerType());
         assertEquals(CommonTestData.RECEPTION_HANDLER_CLASS_NAME, rHParameters.getReceptionHandlerClassName());
         assertEquals(pHParameters, rHParameters.getPluginHandlerParameters());
@@ -102,12 +100,12 @@ public class TestReceptionHandlerParameters {
     }
 
     @Test
-    public void testReceptionHandlerParameters_EmptyReceptionHandlerClassName() {
-        final PluginHandlerParameters pHParameters = commonTestData.getPluginHandlerParameters(false);
-        final ReceptionHandlerParameters rHParameters =
+    void testReceptionHandlerParameters_EmptyReceptionHandlerClassName() {
+        final var pHParameters = commonTestData.getPluginHandlerParameters(false);
+        final var rHParameters =
                 new ReceptionHandlerParameters(CommonTestData.RECEPTION_HANDLER_TYPE, "",
                         CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS, pHParameters);
-        final ValidationResult validationResult = rHParameters.validate();
+        final var validationResult = rHParameters.validate();
         assertEquals(CommonTestData.RECEPTION_HANDLER_TYPE, rHParameters.getReceptionHandlerType());
         assertEquals("", rHParameters.getReceptionHandlerClassName());
         assertEquals(CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS,
@@ -118,24 +116,24 @@ public class TestReceptionHandlerParameters {
     }
 
     @Test
-    public void testReceptionHandlerParameters_EmptyPluginHandler() {
-        final PluginHandlerParameters pHParameters = commonTestData.getPluginHandlerParameters(true);
-        final ReceptionHandlerParameters rHParameters = new ReceptionHandlerParameters(
+    void testReceptionHandlerParameters_EmptyPluginHandler() {
+        final var pHParameters = commonTestData.getPluginHandlerParameters(true);
+        final var rHParameters = new ReceptionHandlerParameters(
                 CommonTestData.RECEPTION_HANDLER_TYPE, CommonTestData.RECEPTION_HANDLER_CLASS_NAME,
                 CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS, pHParameters);
-        ValidationResult result = rHParameters.validate();
+        var result = rHParameters.validate();
         assertFalse(result.isValid());
         assertThat(result.getResult()).contains("\"policyForwarders\"", "minimum");
     }
 
     @Test
-    public void testReceptionHandlerParameters_InvalidReceptionHandlerClass() {
-        final PluginHandlerParameters pHParameters = commonTestData.getPluginHandlerParameters(false);
+    void testReceptionHandlerParameters_InvalidReceptionHandlerClass() {
+        final var pHParameters = commonTestData.getPluginHandlerParameters(false);
 
-        final ReceptionHandlerParameters rHParameters = new ReceptionHandlerParameters(
+        final var rHParameters = new ReceptionHandlerParameters(
                 CommonTestData.RECEPTION_HANDLER_TYPE, CommonTestData.RECEPTION_HANDLER_CLASS_NAME + "Invalid",
                 CommonTestData.RECEPTION_CONFIGURATION_PARAMETERS, pHParameters);
-        final ValidationResult validationResult = rHParameters.validate();
+        final var validationResult = rHParameters.validate();
         assertEquals(CommonTestData.RECEPTION_HANDLER_TYPE, rHParameters.getReceptionHandlerType());
         assertEquals(CommonTestData.RECEPTION_HANDLER_CLASS_NAME + "Invalid",
                 rHParameters.getReceptionHandlerClassName());
diff --git a/main/src/test/java/org/onap/policy/distribution/main/rest/TestDistributionRestServer.java b/main/src/test/java/org/onap/policy/distribution/main/rest/TestDistributionRestServer.java
index ce4cda24..4673f383 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/rest/TestDistributionRestServer.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/rest/TestDistributionRestServer.java
@@ -25,22 +25,17 @@ package org.onap.policy.distribution.main.rest;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatCode;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import jakarta.ws.rs.client.ClientBuilder;
+import jakarta.ws.rs.core.MediaType;
 import java.io.IOException;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.ClientBuilder;
-import javax.ws.rs.client.Invocation;
-import javax.ws.rs.client.WebTarget;
-import javax.ws.rs.core.MediaType;
 import org.glassfish.jersey.client.ClientConfig;
 import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;
-import org.junit.Before;
-import org.junit.Test;
-import org.mockito.internal.util.reflection.Whitebox;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.common.endpoints.http.server.RestServer;
-import org.onap.policy.common.endpoints.parameters.RestServerParameters;
 import org.onap.policy.common.endpoints.report.HealthCheckReport;
 import org.onap.policy.common.parameters.ParameterService;
 import org.onap.policy.common.utils.network.NetworkUtil;
@@ -53,7 +48,7 @@ import org.onap.policy.distribution.main.startstop.Main;
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestDistributionRestServer {
+class TestDistributionRestServer {
 
     private static final String NOT_ALIVE = "not alive";
     private static final String ALIVE = "alive";
@@ -62,32 +57,31 @@ public class TestDistributionRestServer {
 
     private int port;
 
-    @Before
-    public void setUp() {
+    @BeforeEach
+    void setUp() {
         ParameterService.clear();
     }
 
     @Test
-    public void testHealthCheckSuccess() throws IOException, InterruptedException {
-        final String reportString =
+    void testHealthCheckSuccess() throws IOException, InterruptedException {
+        final var reportString =
                         "HealthCheckReport(name=Policy SSD, url=" + SELF + ", healthy=true, code=200, message=alive)";
-        final Main main = startDistributionService();
-        final HealthCheckReport report = performHealthCheck();
+        final var main = startDistributionService();
+        final var report = performHealthCheck();
         validateReport(NAME, SELF, true, 200, ALIVE, reportString, report);
         assertThatCode(() -> stopDistributionService(main)).doesNotThrowAnyException();
     }
 
     @Test
-    public void testHealthCheckFailure() throws IOException, InterruptedException {
+    void testHealthCheckFailure() throws IOException, InterruptedException {
         port = NetworkUtil.allocPort();
-        final String reportString =
+        final var reportString =
                 "HealthCheckReport(name=Policy SSD, url=" + SELF + ", healthy=false, code=500, message=not alive)";
-        final RestServerParameters restServerParams = new CommonTestData().getRestServerParameters(false);
-        Whitebox.setInternalState(restServerParams, "port", port);
+        final var restServerParams = new CommonTestData().getRestServerParameters(port);
         restServerParams.setName(CommonTestData.DISTRIBUTION_GROUP_NAME);
-        final RestServer restServer = new RestServer(restServerParams, null, DistributionRestController.class);
+        final var restServer = new RestServer(restServerParams, null, DistributionRestController.class);
         restServer.start();
-        final HealthCheckReport report = performHealthCheck();
+        final var report = performHealthCheck();
         validateReport(NAME, SELF, false, 500, NOT_ALIVE, reportString, report);
         assertTrue(restServer.isAlive());
         assertThat(restServer.toString()).startsWith("RestServer(servers=");
@@ -104,16 +98,16 @@ public class TestDistributionRestServer {
         main.shutdown();
     }
 
-    private HealthCheckReport performHealthCheck() throws InterruptedException, IOException {
-        final ClientConfig clientConfig = new ClientConfig();
+    private HealthCheckReport performHealthCheck() throws InterruptedException {
+        final var clientConfig = new ClientConfig();
 
-        final HttpAuthenticationFeature feature = HttpAuthenticationFeature.basic("healthcheck", "zb!XztG34");
+        final var feature = HttpAuthenticationFeature.basic("healthcheck", "zb!XztG34");
         clientConfig.register(feature);
 
-        final Client client = ClientBuilder.newClient(clientConfig);
-        final WebTarget webTarget = client.target("http://localhost:" + port + "/healthcheck");
+        final var client = ClientBuilder.newClient(clientConfig);
+        final var webTarget = client.target("http://localhost:" + port + "/healthcheck");
 
-        final Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);
+        final var invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);
 
         CommonTestData.awaitServer(port);
         return invocationBuilder.get(HealthCheckReport.class);
diff --git a/main/src/test/java/org/onap/policy/distribution/main/rest/TestHttpsDistributionRestServer.java b/main/src/test/java/org/onap/policy/distribution/main/rest/TestHttpsDistributionRestServer.java
index 82e40ccd..ffe0c8d5 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/rest/TestHttpsDistributionRestServer.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/rest/TestHttpsDistributionRestServer.java
@@ -23,21 +23,16 @@
 package org.onap.policy.distribution.main.rest;
 
 import static org.assertj.core.api.Assertions.assertThatCode;
-import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import jakarta.ws.rs.client.ClientBuilder;
+import jakarta.ws.rs.core.MediaType;
 import java.io.IOException;
 import java.security.SecureRandom;
-import java.util.Properties;
 import javax.net.ssl.SSLContext;
-import javax.net.ssl.TrustManager;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.ClientBuilder;
-import javax.ws.rs.client.Invocation;
-import javax.ws.rs.client.WebTarget;
-import javax.ws.rs.core.MediaType;
 import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.common.endpoints.report.HealthCheckReport;
 import org.onap.policy.common.parameters.ParameterService;
 import org.onap.policy.common.utils.network.NetworkUtil;
@@ -51,7 +46,7 @@ import org.onap.policy.distribution.main.startstop.Main;
  *
  * @author Libo Zhu (libo.zhu@intel.com)
  */
-public class TestHttpsDistributionRestServer {
+class TestHttpsDistributionRestServer {
 
     private static final String ALIVE = "alive";
     private static final String SELF = NetworkUtil.getHostname();
@@ -59,23 +54,23 @@ public class TestHttpsDistributionRestServer {
 
     private int port;
 
-    @Before
-    public void setUp() {
+    @BeforeEach
+    void setUp() {
         ParameterService.clear();
     }
 
     @Test
-    public void testHttpsHealthCheckSuccess() throws Exception {
-        final String reportString =
+    void testHttpsHealthCheckSuccess() throws Exception {
+        final var reportString =
                         "HealthCheckReport(name=Policy SSD, url=" + SELF + ", healthy=true, code=200, message=alive)";
-        final Main main = startDistributionService();
-        final HealthCheckReport report = performHealthCheck();
+        final var main = startDistributionService();
+        final var report = performHealthCheck();
         validateReport(NAME, SELF, true, 200, ALIVE, reportString, report);
         assertThatCode(() -> stopDistributionService(main)).doesNotThrowAnyException();
     }
 
     private Main startDistributionService() throws IOException, InterruptedException {
-        final Properties systemProps = System.getProperties();
+        final var systemProps = System.getProperties();
         systemProps.put("javax.net.ssl.keyStore", new SelfSignedKeyStore().getKeystoreName());
         systemProps.put("javax.net.ssl.keyStorePassword", SelfSignedKeyStore.KEYSTORE_PASSWORD);
         System.setProperties(systemProps);
@@ -91,19 +86,19 @@ public class TestHttpsDistributionRestServer {
 
     private HealthCheckReport performHealthCheck() throws Exception {
 
-        final TrustManager[] noopTrustManager = NetworkUtil.getAlwaysTrustingManager();
+        final var noopTrustManager = NetworkUtil.getAlwaysTrustingManager();
 
-        final SSLContext sc = SSLContext.getInstance("TLSv1.2");
+        final var sc = SSLContext.getInstance("TLSv1.2");
         sc.init(null, noopTrustManager, new SecureRandom());
-        final ClientBuilder clientBuilder =
+        final var clientBuilder =
                 ClientBuilder.newBuilder().sslContext(sc).hostnameVerifier((host, session) -> true);
-        final Client client = clientBuilder.build();
-        final HttpAuthenticationFeature feature = HttpAuthenticationFeature.basic("healthcheck", "zb!XztG34");
+        final var client = clientBuilder.build();
+        final var feature = HttpAuthenticationFeature.basic("healthcheck", "zb!XztG34");
         client.register(feature);
 
-        final WebTarget webTarget = client.target("https://localhost:" + port + "/healthcheck");
+        final var webTarget = client.target("https://localhost:" + port + "/healthcheck");
 
-        final Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);
+        final var invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);
 
         CommonTestData.awaitServer(port);
         return invocationBuilder.get(HealthCheckReport.class);
diff --git a/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionActivator.java b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionActivator.java
index dd498bfa..af0b58e1 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionActivator.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionActivator.java
@@ -22,17 +22,16 @@
 
 package org.onap.policy.distribution.main.startstop;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.IOException;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.common.parameters.ParameterService;
 import org.onap.policy.distribution.main.PolicyDistributionException;
 import org.onap.policy.distribution.main.parameters.CommonTestData;
-import org.onap.policy.distribution.main.parameters.DistributionParameterGroup;
 import org.onap.policy.distribution.main.parameters.DistributionParameterHandler;
 import org.onap.policy.distribution.main.testclasses.DummyPolicyForwarderParameterGroup;
 
@@ -41,24 +40,24 @@ import org.onap.policy.distribution.main.testclasses.DummyPolicyForwarderParamet
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestDistributionActivator {
+class TestDistributionActivator {
 
-    @Before
-    public void setUp() {
+    @BeforeEach
+    void setUp() {
         ParameterService.clear();
     }
 
     @Test
-    public void testDistributionActivator() throws PolicyDistributionException, IOException {
+    void testDistributionActivator() throws PolicyDistributionException, IOException {
         CommonTestData.makeConfigFile("parameters/DistributionConfigParameters.json");
         final String[] distributionConfigParameters = { "-c", CommonTestData.CONFIG_FILE };
 
-        final DistributionCommandLineArguments arguments =
+        final var arguments =
                 new DistributionCommandLineArguments(distributionConfigParameters);
 
-        final DistributionParameterGroup parGroup = new DistributionParameterHandler().getParameters(arguments);
+        final var parGroup = new DistributionParameterHandler().getParameters(arguments);
 
-        final DistributionActivator activator = new DistributionActivator(parGroup);
+        final var activator = new DistributionActivator(parGroup);
         activator.initialize();
         assertTrue(activator.getDistributionParameterGroup().isValid());
         assertTrue(DistributionActivator.isAlive());
diff --git a/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionCommandLineArguments.java b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionCommandLineArguments.java
index 0a0e5fa0..09ab1314 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionCommandLineArguments.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestDistributionCommandLineArguments.java
@@ -24,7 +24,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertThrows;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.distribution.main.PolicyDistributionRuntimeException;
 
 /**
@@ -33,49 +33,49 @@ import org.onap.policy.distribution.main.PolicyDistributionRuntimeException;
  * @author Adheli Tavares (adheli.tavares@est.tech)
  *
  */
-public class TestDistributionCommandLineArguments {
+class TestDistributionCommandLineArguments {
 
     @Test
-    public void testDistributionOnlyFileName() {
+    void testDistributionOnlyFileName() {
         String[] testArgs = {"src/test/resources/parameters/DistributionConfigParameters.json"};
         assertThrows(PolicyDistributionRuntimeException.class, () -> new DistributionCommandLineArguments(testArgs));
     }
 
     @Test
-    public void testDistributionCommandLineArgumentsException() {
+    void testDistributionCommandLineArgumentsException() {
         String[] wrongParams = {"arg1", "nothing", "{\"someJson\":1}"};
         assertThrows(PolicyDistributionRuntimeException.class, () -> new DistributionCommandLineArguments(wrongParams));
     }
 
     @Test
-    public void testValidateFileNameEmpty() {
+    void testValidateFileNameEmpty() {
         String[] argsOnlyKeyNoValue = {"-c", ""};
         assertValidate(argsOnlyKeyNoValue, "policy-distribution configuration file was not specified as an argument");
     }
 
     @Test
-    public void testValidateFileNameDoesNotExist() {
+    void testValidateFileNameDoesNotExist() {
         String[] fileNameNotExistentArgs = {"-c", "someFileName.json"};
         assertValidate(fileNameNotExistentArgs,
                 "policy-distribution configuration file \"someFileName.json\" does not exist");
     }
 
     @Test
-    public void testValidateFileNameIsNotFile() {
+    void testValidateFileNameIsNotFile() {
         String[] folderAsFileNameArgs = {"-c", "src/test/resources/parameters"};
         assertValidate(folderAsFileNameArgs,
                 "policy-distribution configuration file \"src/test/resources/parameters\" is not a normal file");
     }
 
     @Test
-    public void testDistributionVersion() {
+    void testDistributionVersion() {
         String[] testArgs = {"-v"};
-        DistributionCommandLineArguments sutArgs = new DistributionCommandLineArguments(testArgs);
+        var sutArgs = new DistributionCommandLineArguments(testArgs);
         assertThat(sutArgs.version()).startsWith("ONAP Policy Framework Distribution Service");
     }
 
     private void assertValidate(String[] testArgs, String expectedErrorMsg) {
-        DistributionCommandLineArguments sutArgs = new DistributionCommandLineArguments(testArgs);
-        assertThatThrownBy(() -> sutArgs.validate()).hasMessage(expectedErrorMsg);
+        var sutArgs = new DistributionCommandLineArguments(testArgs);
+        assertThatThrownBy(sutArgs::validate).hasMessage(expectedErrorMsg);
     }
 }
diff --git a/main/src/test/java/org/onap/policy/distribution/main/startstop/TestMain.java b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestMain.java
index bdb2ba7d..831b337b 100644
--- a/main/src/test/java/org/onap/policy/distribution/main/startstop/TestMain.java
+++ b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestMain.java
@@ -25,12 +25,12 @@ package org.onap.policy.distribution.main.startstop;
 
 import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.IOException;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import org.onap.policy.common.parameters.ParameterService;
 import org.onap.policy.common.utils.resources.MessageConstants;
 import org.onap.policy.distribution.main.PolicyDistributionException;
@@ -42,25 +42,25 @@ import org.onap.policy.distribution.main.parameters.CommonTestData;
  *
  * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
  */
-public class TestMain {
+class TestMain {
 
-    @Before
-    public void setUp() {
+    @BeforeEach
+    void setUp() {
         ParameterService.clear();
     }
 
     @Test
-    public void testMain() throws PolicyDistributionException, IOException {
+    void testMain() throws PolicyDistributionException, IOException {
         CommonTestData.makeConfigFile("parameters/DistributionConfigParameters.json");
         final String[] distributionConfigParameters = { "-c", CommonTestData.CONFIG_FILE };
-        final Main main = new Main(distributionConfigParameters);
+        final var main = new Main(distributionConfigParameters);
         assertTrue(main.getDistributionParameterGroup().isValid());
         assertEquals(CommonTestData.DISTRIBUTION_GROUP_NAME, main.getDistributionParameterGroup().getName());
         main.shutdown();
     }
 
     @Test
-    public void testMain_NoArguments() {
+    void testMain_NoArguments() {
         final String[] distributionConfigParameters = {};
         assertThatThrownBy(() -> new Main(distributionConfigParameters))
             .isInstanceOf(PolicyDistributionRuntimeException.class)
@@ -68,7 +68,7 @@ public class TestMain {
     }
 
     @Test
-    public void testMain_InvalidArguments() {
+    void testMain_InvalidArguments() {
         final String[] distributionConfigParameters = {"parameters/DistributionConfigParameters.json"};
         assertThatThrownBy(() -> new Main(distributionConfigParameters))
             .isInstanceOf(PolicyDistributionRuntimeException.class)
@@ -76,7 +76,7 @@ public class TestMain {
     }
 
     @Test
-    public void testMain_Help() {
+    void testMain_Help() {
         assertThatCode(() -> {
             final String[] distributionConfigParameters =
             { "-h" };
@@ -85,7 +85,7 @@ public class TestMain {
     }
 
     @Test
-    public void testMain_InvalidParameters() {
+    void testMain_InvalidParameters() {
         final String[] distributionConfigParameters =
             {"-c", "parameters/DistributionConfigParameters_InvalidName.json"};
         assertThatThrownBy(() -> new Main(distributionConfigParameters))