Tests

[djudman]

The bot have no tests, it must be fixed.
I think py.test is a standard for testing in python world, so we will use it https://docs.pytest.org/en/7.1.x/

Base plan:

• test commands
• test main pipeline
  • send text message
  • send file
  • send voice message
  • send location
• test switch mode
• test switch notebook

Test updates data can be placed to json files nearby test

Remember about messages without captions