test_show_versions.py

from sklearn.utils._show_versions import _get_sys_info
from sklearn.utils._show_versions import _get_deps_info
from sklearn.utils._show_versions import show_versions
from sklearn.utils.testing import ignore_warnings


def test_get_sys_info():
    sys_info = _get_sys_info()

    assert 'python' in sys_info
    assert 'executable' in sys_info
    assert 'machine' in sys_info


def test_get_deps_info():
    with ignore_warnings():
        deps_info = _get_deps_info()

    assert 'pip' in deps_info
    assert 'setuptools' in deps_info
    assert 'sklearn' in deps_info
    assert 'numpy' in deps_info
    assert 'scipy' in deps_info
    assert 'Cython' in deps_info
    assert 'pandas' in deps_info
    assert 'matplotlib' in deps_info
    assert 'joblib' in deps_info


def test_show_versions(capsys):
    with ignore_warnings():
        show_versions()
        out, err = capsys.readouterr()

    assert 'python' in out
    assert 'numpy' in out