danarwix opened a new pull request #18881:
URL: https://github.com/apache/airflow/pull/18881


   TLDR;
   refactoring to give a given->when->than testing structure
   https://martinfowler.com/bliki/GivenWhenThen.html
   
   When working on adding the `verify` parameter on 
https://github.com/apache/airflow/pull/18791, i have noticed that in each test 
i see the following:
   
   1. `assert mock_connect.return_value == conn` -> that line did not effect 
the test. inherently, that test ensured that the `MagicMock` equals the 
`MagicMock` which did not contribute anything to the test itself
   2. mocking the connection -> ```python
   mock_get_connection.return_value = Connection(
               login='login', password='password', host='host', schema='hive'
           )
   ```
   is constantly repeated so i extracted it to a function called: 
`get_get_connection_return_value(mock_get_connection, extra=None, 
password=None)`
   3. asserting the parameters in which the connection is called was also 
extracted to a function called: `assert_connection_called_with(mock_connect, 
auth=None, verify=True)`
   
   
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