Add test case for ShenyuClientRegisterEventPublisher

[Divyansh200102]

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[Divyansh200102]

@dragon-zhang @moremind I have no idea why the checks are failing the tests are working fine in my local system please help me resolve this.

[moremind]

looks good, but you should add public for the test method and check the code

[Divyansh200102]

looks good, but you should add public for the test method and check the code

I did as said but still it's not working @moremind .I am not able to figure out what's going wrong?

[moremind]

Error:  src/main/java/org/apache/shenyu/client/core/disruptor/ShenyuClientRegisterEventPublisher.java:[60] (whitespace) EmptyLineSeparator: 'METHOD_DEF' should be separated from previous statement.
Error:  src/main/java/org/apache/shenyu/client/core/disruptor/ShenyuClientRegisterEventPublisher.java:[60,5] (javadoc) JavadocMethod: Missing a Javadoc comment.
Error:  src/main/java/org/apache/shenyu/client/core/disruptor/ShenyuClientRegisterEventPublisher.java:[68] (whitespace) EmptyLineSeparator: 'METHOD_DEF' should be separated from previous statement.
Error:  src/test/java/org/apache/shenyu/client/core/disruptor/subcriber/ShenyuClientRegisterEventPublisherTest.java:[33] (whitespace) EmptyLineSeparator: 'VARIABLE_DEF' should be separated from previous statement.

[Divyansh200102]

Error:  src/main/java/org/apache/shenyu/client/core/disruptor/ShenyuClientRegisterEventPublisher.java:[60] (whitespace) EmptyLineSeparator: 'METHOD_DEF' should be separated from previous statement.
Error:  src/main/java/org/apache/shenyu/client/core/disruptor/ShenyuClientRegisterEventPublisher.java:[60,5] (javadoc) JavadocMethod: Missing a Javadoc comment.
Error:  src/main/java/org/apache/shenyu/client/core/disruptor/ShenyuClientRegisterEventPublisher.java:[68] (whitespace) EmptyLineSeparator: 'METHOD_DEF' should be separated from previous statement.
Error:  src/test/java/org/apache/shenyu/client/core/disruptor/subcriber/ShenyuClientRegisterEventPublisherTest.java:[33] (whitespace) EmptyLineSeparator: 'VARIABLE_DEF' should be separated from previous statement.

Could you please tell how do i resolve the remaining checks ? @moremind