This test case assumes that

• The installation is done in prior.
• License server started with environment variable LONGTERM_USAGE=yes

The content for ACL file regarding long-term reservation feature for testing:

{ "longtermUsage": {        
      "licenses": [
          {
             "licenseNumber": "11223350"
          }
      ]
   }
}

Open Creator/Design Studio. 
Check that "Expires=<expirydate>" is found from qtlicenses.ini after successful opening of QtCreator/Design Studio and the value should be "2022-04-20", if tests done on 19/04, but NOT "2022-07-31"