Tests fail without CUDA

[yurivict]

platform freebsd12 -- Python 3.7.10, pytest-4.5.0, py-1.9.0, pluggy-0.13.1
rootdir: /disk-samsung/freebsd-ports/misc/py-xgboost/work-py37/xgboost-1.4.1
plugins: hypothesis-5.49.0, forked-1.0.2, xdist-1.32.0
collected 292 items / 2 errors / 2 skipped / 288 selected                                                                                                                                    

=========================================================================================== ERRORS ===========================================================================================
______________________________________________________________________ ERROR collecting tests/distributed/test_basic.py ______________________________________________________________________
tests/distributed/test_basic.py:8: in <module>
    dtrain = xgb.DMatrix('../../demo/data/agaricus.txt.train')
/usr/local/lib/python3.7/site-packages/xgboost/core.py:433: in inner_f
    return f(**kwargs)
/usr/local/lib/python3.7/site-packages/xgboost/core.py:544: in __init__
    enable_categorical=enable_categorical,
/usr/local/lib/python3.7/site-packages/xgboost/data.py:559: in dispatch_data_backend
    return _from_uri(data, missing, feature_names, feature_types)
/usr/local/lib/python3.7/site-packages/xgboost/data.py:499: in _from_uri
    ctypes.byref(handle)))
/usr/local/lib/python3.7/site-packages/xgboost/core.py:210: in _check_call
    raise XGBoostError(py_str(_LIB.XGBGetLastError()))
E   xgboost.core.XGBoostError: [13:38:11] /wrkdirs/usr/ports/devel/dmlc-core/work/dmlc-core-0.3-123-gb3a4c71/src/io/local_filesys.cc:104: LocalFileSystem.ListDirectory ../../demo/data error: No such file or directory
E   Stack trace:
E     [bt] (0) 0x856daad1f <dmlc::LogMessageFatal::~LogMessageFatal()+0x6f> at /usr/local/lib/libxgboost.so
E     [bt] (1) 0x85700ca66 <dmlc::io::LocalFileSystem::ListDirectory(dmlc::io::URI const&, std::__1::vector<dmlc::io::FileInfo, std::__1::allocator<dmlc::io::FileInfo> >*)+0x196> at /usr/local/lib/libdmlc.so
E     [bt] (2) 0x856ffc8de <dmlc::io::InputSplitBase::ConvertToURIs(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)+0x23e> at /usr/local/lib/libdmlc.so
E     [bt] (3) 0x856ffba65 <dmlc::io::InputSplitBase::InitInputFileInfo(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, bool)+0x45> at /usr/local/lib/libdmlc.so
E     [bt] (4) 0x856ffb843 <dmlc::io::InputSplitBase::Init(dmlc::io::FileSystem*, char const*, unsigned long, bool)+0xd3> at /usr/local/lib/libdmlc.so
E     [bt] (5) 0x856ff2635 <dmlc::io::LineSplitter::LineSplitter(dmlc::io::FileSystem*, char const*, unsigned int, unsigned int)+0xd5> at /usr/local/lib/libdmlc.so
E     [bt] (6) 0x856ff1a50 <dmlc::InputSplit::Create(char const*, char const*, unsigned int, unsigned int, char const*, bool, int, unsigned long, bool)+0x2c0> at /usr/local/lib/libdmlc.so
E     [bt] (7) 0x856ff1782 <dmlc::InputSplit::Create(char const*, unsigned int, unsigned int, char const*)+0x22> at /usr/local/lib/libdmlc.so
___________________________________________________________________ ERROR collecting tests/python-gpu/test_large_input.py ____________________________________________________________________
ImportError while importing test module '/disk-samsung/freebsd-ports/misc/py-xgboost/work-py37/xgboost-1.4.1/tests/python-gpu/test_large_input.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
tests/python-gpu/test_large_input.py:3: in <module>
    import cupy as cp
E   ModuleNotFoundError: No module named 'cupy'
====================================================================================== warnings summary ======================================================================================
tests/python/test_ranking.py:139
  /disk-samsung/freebsd-ports/misc/py-xgboost/work-py37/xgboost-1.4.1/tests/python/test_ranking.py:139: PytestAssertRewriteWarning: assertion is always true, perhaps remove parentheses?
    assert (set(cv.keys()) == {'test-ndcg-mean', 'train-ndcg-mean', 'test-ndcg-std',

/usr/local/lib/python3.7/site-packages/_pytest/mark/structures.py:324
/usr/local/lib/python3.7/site-packages/_pytest/mark/structures.py:324
  /usr/local/lib/python3.7/site-packages/_pytest/mark/structures.py:324: PytestUnknownMarkWarning: Unknown pytest.mark.mgpu - is this a typo?  You can register custom marks to avoid this warning - for details, see https://docs.pytest.org/en/latest/mark.html
    PytestUnknownMarkWarning,

-- Docs: https://docs.pytest.org/en/latest/warnings.html
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 2 errors during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
======================================================================= 2 skipped, 3 warnings, 2 error in 6.39 seconds =======================================================================
*** Error code 2

How to test without CUDA?

[hcho3]

You should ignore all tests under the diretory tests/python-gpu, as they depend on the existence of CUDA.