Unify unittests for WSIReader

[bhashemian]

Description

This PR unifies unittests for WSIReader with different backends and also adds new tests to cover situations where WSIReader is being used in a transform and loaded via a data loader.

Related to: #3257 (comment)

Status

Ready

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests.

[bhashemian]

@Nic-Ma @wyli , I'd appreciate your review here.

[wyli]

Thanks, it looks good to me.

[wyli]

/build

[wyli]

there's an error after merging this PR, any idea?

https://github.com/Project-MONAI/MONAI/actions/runs/1428856690

[Nic-Ma]

Hi @wyli ,

Thanks for raising the issue.
I am trying to fix it locally.

Thanks.

[wyli]

thanks @Nic-Ma , is it related to this one?
https://github.com/Project-MONAI/MONAI/runs/4125617483?check_suite_focus=true

======================================================================
ERROR: test_with_dataloader_0____w_MONAI_MONAI_tests_testing_data_temp_1sGTKZlJBIz53pfqTxoTqiIQzIoEzHLAe_tiff (tests.test_wsireader.TestCuCIM)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/conda/lib/python3.6/site-packages/parameterized/parameterized.py", line 533, in standalone_func
    return func(*(a + p.args), **p.kwargs)
  File "/__w/MONAI/MONAI/tests/test_wsireader.py", line 154, in test_with_dataloader
    spatial_shape = tuple(d.item() for d in data["image_meta_dict"]["spatial_shape"])
  File "/__w/MONAI/MONAI/tests/test_wsireader.py", line 154, in <genexpr>
    spatial_shape = tuple(d.item() for d in data["image_meta_dict"]["spatial_shape"])
ValueError: only one element tensors can be converted to Python scalars

----------------------------------------------------------------------

[Nic-Ma]

Hi @Wenqi ,

This error message is related to my PR #3255, I think already fixed in the latest commit: d84a39b

Thanks.