def test_oss_sample_wt_fit():
 oss = OneSidedSelection(random_state=RND_SEED)
 assert_raises(RuntimeError, oss.sample, X, Y)

def test_oss_sample_wt_fit ( ) : oss = OneSidedSelection ( random_state = RND_SEED ) assert_raises ( RuntimeError , oss . sample , X , Y )
test either if an error is raised when sample is called before fitting .