test: create state with cleaned up operation

[enrico-teterra-maramalabs]

This PR contains:

a failing test

Describe the problem you have without this PR

to reproduce the issue:

• have an rx-state on a database with a sqlite storage or other persisted storage
• make more than 5 writes to trigger _cleanup to run on the state
• recreate the database and reattach the state (restart the app)
• an exception occurs

[pubkey]

Can you make the test by only using the "normal" RxDB api without accessing the internal storageInstance? Atm this test does not seem to match you reproduction steps.

[enrico-teterra-maramalabs]

yep no problem, please take a look at the test now

the test as it is now fails with:

+ expected - actual

       {
      -  "": {
      -    "foo": "bar6"
      -  }
         "foo": "bar6"
       }

[pubkey]

Thank you for reporting. Fixed here https://github.com/pubkey/rxdb/pull/6564