Attila Doroszlai created HDDS-9806:
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             Summary: Refactor TestBlockOutputStream
                 Key: HDDS-9806
                 URL: https://issues.apache.org/jira/browse/HDDS-9806
             Project: Apache Ozone
          Issue Type: Improvement
          Components: test
            Reporter: Attila Doroszlai
            Assignee: Attila Doroszlai


* {{TestBlockOutputStream}} is duplicated as {{TestBlockOutputStreamFlushDelay}}
* {{TestBlockOutputStreamWithFailures}} is duplicated as 
{{TestBlockOutputStreamWithFailuresFlushDelay}}

The main difference between the duplicates is that the ones without 
{{FlushDelay}} set {{OzoneClientConfig.setStreamBufferFlushDelay(false)}}, 
while the ones with {{FlushDelay}} rely on the default value for this property 
being {{true}}.

The goal of this task is to reduce code duplication.

Furthermore, {{streamBufferFlushDelay}} is a client-side config, so we can 
completely merge {{TestBlockOutputStream}} and 
{{TestBlockOutputStreamFlushDelay}} by:
 * making test cases parameterized
 * creating a new client for each test case

{code}
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/client/rpc/TestBlockOutputStream.java
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/client/rpc/TestBlockOutputStreamFlushDelay.java
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/client/rpc/TestBlockOutputStreamWithFailures.java
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/client/rpc/TestBlockOutputStreamWithFailuresFlushDelay.java
{code}



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