[GitHub] pnowojski opened a new pull request #6570: [FLINK-10159][tests] Fail TestHarness.initializeState if harness has already been initialized

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pnowojski opened a new pull request #6570: [FLINK-10159][tests] Fail TestHarness.initializeState if harness has already been initialized
URL: https://github.com/apache/flink/pull/6570
 
 
   This is a change in tests only. Previously it was technically possible to call first `harness.open()` followed by `harness.initializeState(fooBar)`. However this was incorrect, since `open()` was already calling `initializeState(null)`, which was leading to quirks. This commit adds a `checkState` which makes sure that `initializeState` is called only once.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
   

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