Test suite should not access internet directly

[savente93]

HydroMT version checks

• [X] I have checked that this issue has not already been reported.
• [X] I have checked that this bug exists on the latest version of HydroMT.

Reproducible Example

pip install pytest-socket pytest --disable-socket

Current behaviour

Some of the tests directly access the internet. This is bad practice for performance, security and reproducability.

Desired behaviour

The access to the relevant services should get mocked and the processing of the relevant data should be tested separately.

Additional context

No response

[DirkEilander]

We access the internet to get data catalogs and artifact data.

• Reading the data catalogs is an important aspect hydromt and should be tested.
• Also getting some real-world data for testing is very useful and easy. We use the artifact data for this. It would be a big effort to replace this with mock data.

@savente93 Do you have suggestions how to go ahead on these points without internet access? And how big is this issue in your opinion?

[savente93]

I've got some ideas. It is not a big issue though, more of a nice to have. I will pick this up when I have the time at some point but we do not need to prioritize it at the moment