remove nose-style test classes #24148
Description
With the development version of pytest
✘ 17:37:16 $ pip list | grep pytest
pytest 7.2.0.dev320+g196f01965
pytest-benchmark 3.4.1
pytest-cov 4.0.0
pytest-forked 1.4.0
pytest-instafail 0.4.2
pytest-rerunfailures 10.2
pytest-timeout 2.1.0
pytest-tornasync 0.6.0.post2
pytest-xdist 2.5.0
pytest-xvfb 2.0.0
I'm seeing the following errors locally
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_form_main_list - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_form_each_dict - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_form_dict_keys - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_results_baseline - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_results_bootstrapped - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_results_whiskers_float - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_results_whiskers_range - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_results_whiskers_percentiles - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_results_withlabels - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_label_error - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_bad_dims - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_boxplot_stats::test_boxplot_stats_autorange_false - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_callback_complete[True] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_callback_complete[False] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_callback_disconnect[True] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_callback_disconnect[False] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_callback_wrong_disconnect[True] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_callback_wrong_disconnect[False] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_registration_on_non_empty_registry[True] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_registration_on_non_empty_registry[False] - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_cbook.py::Test_callback_registry::test_pickling - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_none - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_mean - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_mean_1d_base_slope_off_list_andor_axis0 - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_mean_2d - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_ValueError - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_mean_ValueError - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_linear - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_str_linear_1d - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
ERROR lib/matplotlib/tests/test_mlab.py::TestDetrend::test_detrend_linear_2d - pytest.PytestRemovedIn8Warning: Support for nose tests is deprecated and will be removed in a future release.
We are still using nose-stil test classes that we apparently need to migrate away from.
I'm labeling this "good first issue" because you do not need to understand anything about Matplotlib to do this work, but medium difficulty because it involves changing the tests which is a high-risk activity (as you do not have tests on your tests) so this is not a good issue for someone new to Python or testing frameworks.