Verify displayed items instead of verifying the list's existence in xxxxScreenTest tests

[takahirom]

We should check if the items exist. The list is still a list even when it's empty.

[Corvus400]

I would like to work on this issue. ✋
You mean correcting these kinds of tests, right?
#395 (comment)

[takahirom]

Yes, that's what I mean. Thanks!

[iamayushsharmaa]

I would like to work on this issue
#464

[takahirom]

@iamayushsharmaa Thank you for raising your hand. This issue has already been assigned. However, since there are many screens to fix, if you have a specific screen you'd like to work on, please let me know the name. I think we can collaborate to address this issue.

[iamayushsharmaa]

yeah sure

[Corvus400]

The contents of FavoritesScreenTest also need to be modified, but we are working on the following PR, so we will check the contents after they are merged and modify them again if there are any shortcomings.
#569

[Corvus400]

Confirmation of remaining tasks

• AboutScreenTest
  • No test modification support is required.
• ContributorsScreenTest
  • ♻️ Enhanced ContributorsScreen testing. #503
• EventMapScreenTest
  • No test modification support is required.
• FavoritesScreenTest
  • The response to this PR would have eliminated the need for this task.
• ProfileCardScreenTest
  • The implementation is not yet complete, so the response is temporarily on hold for this task.
• SearchScreenTest
  • ♻️ Add SearchScreenTest for Day Filter #588
  • ♻️ Add SearchScreenTest for Category Filter #592
  • ♻️ Add SearchScreenTest for Language Filter #600
• SponsorsScreenTest
  • ♻️ Enhanced SponsorsScreen testing.  #587
• StaffScreenTest
  • ♻️ Enhanced StaffScreen testing. #502
• TimetableItemDetailScreenTest
  • No test modification support is required.
• TimetableScreenTest
  • Pending until this PR is merged.