Test/unit tests pareto optimizer

[Marco-Premier]

Project Robyn

Add tests for pareto_optimizer

Test Plan

[dhavalpatel624624]

Can you add the pytest run results? Also are we going to be using the unittest library or pytest? We should standardize the libraries we use across all unit tests. Also, I think this needs a rebase on robynpy_release (you are out of date currently)

Also, are there any common best practices that should be followed here for generating mock data. I feel like there is a lot of redundancy in how the data is mocked for each function

[Marco-Premier]

Can you add the pytest run results? Also are we going to be using the unittest library or pytest? We should standardize the libraries we use across all unit tests. Also, I think this needs a rebase on robynpy_release (you are out of date currently)

Also, are there any common best practices that should be followed here for generating mock data. I feel like there is a lot of redundancy in how the data is mocked for each function

Goog points.
I'm happy to use pytest.
I refactor the code to use pytest and to group common mock data setup using pytest fixture.
Also I noticed that in tests where we aim to use pytest we still depend on unittest framework, eg. for patch, MagicMock etc...

We may consider using the pytest-mock instead.
I'd do that on a separate PR

[dhavalpatel624624]

need to remove pareto_optimizer and response_curve file changes. A rebase should fix it :)