[QA] Add unit tests for vizro-ai dashboard

[nadijagraca]

Description

• components.py

testing unit	comment	status
ComponentPlan	for majority real model is required to test.	❌
ComponentPlan	On to-do list components plan instantiation	✅

• controls.py

testing unit	comment	status
_create_filter_proxy	tested all but validation for datepicker - datepicker on to-do list	✅
_create_filter	tested	✅
ControlPlan	tested validation for ControlPlan	✅

• dashboard.py

testing unit	comment	status
DashboardPlanner	tested DashboardPlanner instantiation	✅

• df_info.py

testing unit	comment	status
_get_df_info	tested if it produces correct df_schema and df sample	✅
_create_df_info_content	On to-do list - the string it produces is quite large	❌

• layout.py

testing unit	comment	status
_convert_to_grid	tested valid and invalid option	✅
LayoutPlan	tested	✅

• page.py

testing unit	comment	status
PagePlanner	PagePlanner instantiation	✅
Page Planner validation functions	tested	✅
_get_layout, _build_layout, _controllable_components, create, _get_controls	not tested as these require actual model	❌

To-do list:

• components plan instantiation
• _create_df_info_content
• validation for controls datepicker

Screenshot

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[lingyielia]

Great work! Thanks for already putting together so many tests. My comments are mainly on additional tests we could create. Let me know if any one of them is not clear.

[maxschulz-COL]

Hey, didn't get all that far, but tried to make some useful comments! THanks a lot already, this is really important!

[maxschulz-COL]

Ok I wizzed through, trying to spot any major things. I think we can merge soon - let me know if any of the comments are unclear.

Thanks for tackling this very daunting task - it really is not easy 💪 !

[lingyielia]

Really great work on building up all these tests for dashboard! Happy to merge this version as it's in a very good shape now.