Improve the clarity of unit test fixtures

[unkcpz]

The unit test fixtures are a bit messy at the moment, the performance is not good as well. Some fixtures to create app object and step objects seems redundant. We need to set the app as a session with a clear tear-down process to reset, instead creat a new object and setting parameters from the beginning.

@superstar54 let's try to set a pair coding session between two of us to tidy things up.

[unkcpz]

I think this issue become a high priority after the stable release and more qeapp plugins start shaping.
Can I assign this to you @superstar54? Since most nice unit tests are brought to the code base with the plugin design.

[unkcpz]

Hi @superstar54, can this be assigned to you? I think the plugins would benifit from having testing. Clear fixtures can help developers to writing sustainable plugins.

[superstar54]

To make the unit test more clear. Here are the catalogs for the test:

• Setting GUI

  • set
  • reset
  • load previous results

• Result GUI

  • mock workchain output

• Workchain

  • main app
  • plugin related