projektAI/venv/Lib/site-packages/pandas/tests/test_optional_dependency.py

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2021-06-06 22:13:05 +02:00
import sys
import types
import pytest
from pandas.compat._optional import VERSIONS, import_optional_dependency
import pandas._testing as tm
def test_import_optional():
match = "Missing .*notapackage.* pip .* conda .* notapackage"
with pytest.raises(ImportError, match=match):
import_optional_dependency("notapackage")
result = import_optional_dependency("notapackage", raise_on_missing=False)
assert result is None
def test_xlrd_version_fallback():
pytest.importorskip("xlrd")
import_optional_dependency("xlrd")
def test_bad_version(monkeypatch):
name = "fakemodule"
module = types.ModuleType(name)
module.__version__ = "0.9.0"
sys.modules[name] = module
monkeypatch.setitem(VERSIONS, name, "1.0.0")
match = "Pandas requires .*1.0.0.* of .fakemodule.*'0.9.0'"
with pytest.raises(ImportError, match=match):
import_optional_dependency("fakemodule")
with tm.assert_produces_warning(UserWarning):
result = import_optional_dependency("fakemodule", on_version="warn")
assert result is None
module.__version__ = "1.0.0" # exact match is OK
result = import_optional_dependency("fakemodule")
assert result is module
def test_no_version_raises(monkeypatch):
name = "fakemodule"
module = types.ModuleType(name)
sys.modules[name] = module
monkeypatch.setitem(VERSIONS, name, "1.0.0")
with pytest.raises(ImportError, match="Can't determine .* fakemodule"):
import_optional_dependency(name)