Split tests related to virtualfiles into multiple test files

[seisman]

Description of proposed changes

Split pygmt/tests/test_clib_virtualfiles.py into:

• pygmt/tests/test_clib_inquire_virtualfile.py
• pygmt/tests/test_clib_virtualfile_from_matrix.py
• pygmt/tests/test_clib_virtualfile_from_stringio.py
• pygmt/tests/test_clib_virtualfile_from_vectors.py
• pygmt/tests/test_clib_virtualfile_in.py

Note that open_virtualfile tests remain in test_clib_virtualfiles.py.

Addresses #3351 (comment).

Previous split at #2784.

[codspeed-hq]

CodSpeed Performance Report

Merging #3512 will not alter performance

_{Comparing tests/split (4ce69d8) with main (f224563)}

Summary

✅ 93 untouched benchmarks

🆕 8 new benchmarks
⁉️ 8 dropped benchmarks

⚠️Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	tests/split	Change
🆕	test_open_virtualfile	N/A	62.7 ms	N/A
🆕	test_virtualfile_from_matrix	N/A	63.3 ms	N/A
🆕	test_virtualfile_from_vectors	N/A	63.9 ms	N/A
🆕	test_virtualfile_from_vectors_one_string_or_object_column[object]	N/A	8.4 ms	N/A
🆕	test_virtualfile_from_vectors_one_string_or_object_column[str]	N/A	8.4 ms	N/A
🆕	test_virtualfile_in_required_z_matrix[DataFrame-vector]	N/A	9.6 ms	N/A
🆕	test_virtualfile_in_required_z_matrix[Dataset-vector]	N/A	11.9 ms	N/A
🆕	test_virtualfile_in_required_z_matrix[array-matrix]	N/A	9 ms	N/A
⁉️	test_virtual_file	63 ms	N/A	N/A
⁉️	test_virtualfile_from_matrix	63.3 ms	N/A	N/A
⁉️	test_virtualfile_from_vectors	64 ms	N/A	N/A
⁉️	test_virtualfile_from_vectors_one_string_or_object_column[object]	8.4 ms	N/A	N/A
⁉️	test_virtualfile_from_vectors_one_string_or_object_column[str]	8.4 ms	N/A	N/A
⁉️	test_virtualfile_in_required_z_matrix[DataFrame-vector]	9.6 ms	N/A	N/A
⁉️	test_virtualfile_in_required_z_matrix[Dataset-vector]	11.9 ms	N/A	N/A
⁉️	test_virtualfile_in_required_z_matrix[array-matrix]	9 ms	N/A	N/A

[weiji14]

Could we keep test_inquire_virtualfile in test_clib_virtualfiles.py? I'd like to keep that file so that we can still look back at the git history more easily.

[seisman]

OK, I've renamed test_clib_open_virtualfiles.py back to test_clib_virtualfiles.py.

For inquire_virtualfile, I plan to add more tests about GMT_IN in the future.

[weiji14]

Ok, that works too, thanks!