def test_engines_not_installed() -> None:
with pytest.raises(ValueError, match=r"xarray is unable to open"):
plugins.guess_engine("not-valid")
with pytest.raises(ValueError,
match=r"found the following matches with the input"):
plugins.guess_engine("foo.nc")
def test_no_matching_engine_found() -> None:
with pytest.raises(ValueError, match=r"did not find a match in any"):
plugins.guess_engine("not-valid")
with pytest.raises(ValueError,
match=r"found the following matches with the input"):
plugins.guess_engine("foo.nc")
def test_no_engines_installed():
with pytest.raises(ValueError,
match="no currently installed IO backends."):
plugins.guess_engine("not-valid")
def test_no_matching_engine_found():
with pytest.raises(
ValueError,
match="match in any of xarray's currently installed IO"):
plugins.guess_engine("not-valid")