def test_instance_hardness_region_all_same():
X = X_dsel_ex1
y = y_dsel_ex1
ds_test = DS(create_pool_classifiers())
ds_test.fit(X, y)
neighbors = [0, 1, 2, 6, 7, 8, 13]
IH = ds_test._hardness_region_competence(neighbors)
assert IH == 0.0
def test_instance_hardness_region(index, expected):
X = X_dsel_ex1
y = y_dsel_ex1
ds_test = DS(create_pool_classifiers())
ds_test.fit(X, y)
neighbors = neighbors_ex1[index, :]
IH = ds_test._hardness_region_competence(neighbors)
assert np.isclose(IH, expected, atol=0.01)
