test_feature_hasher.py 文件源码

def test_hasher_invalid_input():
    assert_raises(ValueError, FeatureHasher, input_type="gobbledygook")
    assert_raises(ValueError, FeatureHasher, n_features=-1)
    assert_raises(ValueError, FeatureHasher, n_features=0)
    assert_raises(TypeError, FeatureHasher, n_features='ham')

    h = FeatureHasher(n_features=np.uint16(2 ** 6))
    assert_raises(ValueError, h.transform, [])
    assert_raises(Exception, h.transform, [[5.5]])
    assert_raises(Exception, h.transform, [[None]])