def test_change_directory_non_existing_directory(tmpdir):
pathname = tmpdir.join('subdir')
assert not os.path.exists(str(pathname))
with pytest.raises(OSError) as err:
with change_directory(str(pathname)):
pass
assert str(pathname) in str(err)
def test_change_directory_existing_directory(tmpdir):
newdir = tmpdir.mkdir('subdir')
with change_directory(str(newdir)):
assert os.getcwd() == os.path.realpath(str(newdir))
assert os.getcwd() != os.path.realpath(str(newdir))
