/
test_utility.py
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/
test_utility.py
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# -*- coding: utf-8 -*-
from __future__ import division
from __future__ import print_function
import os
import sys
import unittest
import numpy as np
# noinspection PyProtectedMember
from numpy.testing import assert_allclose
from numpy.testing import assert_equal
from numpy.testing import assert_raises
from sklearn.metrics import precision_score
from sklearn.utils import check_random_state
# temporary solution for relative imports in case pyod is not installed
# if pyod is installed, no need to use the following line
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
from pyod.utils.utility import check_parameter
from pyod.utils.utility import standardizer
from pyod.utils.utility import get_label_n
from pyod.utils.utility import precision_n_scores
from pyod.utils.utility import argmaxn
from pyod.utils.utility import get_list_diff
from pyod.utils.utility import get_diff_elements
from pyod.utils.utility import get_intersection
from pyod.utils.utility import invert_order
from pyod.utils.utility import check_detector
from pyod.utils.utility import score_to_label
class TestParameters(unittest.TestCase):
def setUp(self):
pass
def test_check_parameter_range(self):
# verify parameter type correction
with assert_raises(TypeError):
check_parameter('f', 0, 100)
with assert_raises(TypeError):
check_parameter(1, 'f', 100)
with assert_raises(TypeError):
check_parameter(1, 0, 'f')
with assert_raises(TypeError):
check_parameter(argmaxn(value_list=[1, 2, 3], n=1), 0, 100)
# if low and high are both unset
with assert_raises(ValueError):
check_parameter(50)
# if low <= high
with assert_raises(ValueError):
check_parameter(50, 100, 99)
with assert_raises(ValueError):
check_parameter(50, 100, 100)
# check one side
with assert_raises(ValueError):
check_parameter(50, low=100)
with assert_raises(ValueError):
check_parameter(50, high=0)
assert_equal(True, check_parameter(50, low=10))
assert_equal(True, check_parameter(50, high=100))
# if check fails
with assert_raises(ValueError):
check_parameter(-1, 0, 100)
with assert_raises(ValueError):
check_parameter(101, 0, 100)
with assert_raises(ValueError):
check_parameter(0.5, 0.2, 0.3)
# if check passes
assert_equal(True, check_parameter(50, 0, 100))
assert_equal(True, check_parameter(0.5, 0.1, 0.8))
# if includes left or right bounds
with assert_raises(ValueError):
check_parameter(100, 0, 100, include_left=False,
include_right=False)
assert_equal(True, check_parameter(0, 0, 100, include_left=True,
include_right=False))
assert_equal(True, check_parameter(0, 0, 100, include_left=True,
include_right=True))
assert_equal(True, check_parameter(100, 0, 100, include_left=False,
include_right=True))
assert_equal(True, check_parameter(100, 0, 100, include_left=True,
include_right=True))
def tearDown(self):
pass
class TestScaler(unittest.TestCase):
def setUp(self):
random_state = check_random_state(42)
self.X_train = random_state.rand(500, 5)
self.X_test = random_state.rand(100, 5)
self.X_test_diff = random_state.rand(100, 10)
self.scores1 = [0.1, 0.3, 0.5, 0.7, 0.2, 0.1]
self.scores2 = np.array([0.1, 0.3, 0.5, 0.7, 0.2, 0.1])
def test_normalization(self):
# test when X_t is presented and no scalar
norm_X_train, norm_X_test = standardizer(self.X_train, self.X_test)
assert_allclose(norm_X_train.mean(), 0, atol=0.05)
assert_allclose(norm_X_train.std(), 1, atol=0.05)
assert_allclose(norm_X_test.mean(), 0, atol=0.05)
assert_allclose(norm_X_test.std(), 1, atol=0.05)
# test when X_t is not presented and no scalar
norm_X_train = standardizer(self.X_train)
assert_allclose(norm_X_train.mean(), 0, atol=0.05)
assert_allclose(norm_X_train.std(), 1, atol=0.05)
# test when X_t is presented and the scalar is kept
norm_X_train, norm_X_test, scalar = standardizer(self.X_train,
self.X_test,
keep_scalar=True)
assert_allclose(norm_X_train.mean(), 0, atol=0.05)
assert_allclose(norm_X_train.std(), 1, atol=0.05)
assert_allclose(norm_X_test.mean(), 0, atol=0.05)
assert_allclose(norm_X_test.std(), 1, atol=0.05)
if not hasattr(scalar, 'fit') or not hasattr(scalar, 'transform'):
raise AttributeError("%s is not a detector instance." % (scalar))
# test when X_t is not presented and the scalar is kept
norm_X_train, scalar = standardizer(self.X_train, keep_scalar=True)
assert_allclose(norm_X_train.mean(), 0, atol=0.05)
assert_allclose(norm_X_train.std(), 1, atol=0.05)
if not hasattr(scalar, 'fit') or not hasattr(scalar, 'transform'):
raise AttributeError("%s is not a detector instance." % (scalar))
# test shape difference
with assert_raises(ValueError):
standardizer(self.X_train, self.X_test_diff)
def test_invert_order(self):
target = np.array([-0.1, -0.3, -0.5, -0.7, -0.2, -0.1]).ravel()
scores1 = invert_order(self.scores1)
assert_allclose(scores1, target)
scores2 = invert_order(self.scores2)
assert_allclose(scores2, target)
target = np.array([0.6, 0.4, 0.2, 0, 0.5, 0.6]).ravel()
scores2 = invert_order(self.scores2, method='subtraction')
assert_allclose(scores2, target)
def tearDown(self):
pass
class TestMetrics(unittest.TestCase):
def setUp(self):
self.y = [0, 0, 1, 1, 1, 0, 0, 0, 1, 0]
self.labels_ = [0.1, 0.2, 0.2, 0.8, 0.2, 0.5, 0.7, 0.9, 1, 0.3]
self.labels_short_ = [0.1, 0.2, 0.2, 0.8, 0.2, 0.5, 0.7, 0.9, 1]
self.manual_labels = [0, 0, 0, 1, 0, 0, 1, 1, 1, 0]
self.outliers_fraction = 0.3
self.value_lists = [0.1, 0.3, 0.2, -2, 1.5, 0, 1, -1, -0.5, 11]
def test_precision_n_scores(self):
assert_equal(precision_score(self.y, self.manual_labels),
precision_n_scores(self.y, self.labels_))
def test_get_label_n(self):
assert_allclose(self.manual_labels,
get_label_n(self.y, self.labels_))
def test_get_label_n_equal_3(self):
manual_labels = [0, 0, 0, 1, 0, 0, 0, 1, 1, 0]
assert_allclose(manual_labels,
get_label_n(self.y, self.labels_, n=3))
def test_inconsistent_length(self):
with assert_raises(ValueError):
get_label_n(self.y, self.labels_short_)
def test_score_to_label(self):
manual_scores = [0.1, 0.4, 0.2, 0.3, 0.5, 0.9, 0.7, 1, 0.8, 0.6]
labels = score_to_label(manual_scores, outliers_fraction=0.1)
assert_allclose(labels, [0, 0, 0, 0, 0, 0, 0, 1, 0, 0])
labels = score_to_label(manual_scores, outliers_fraction=0.3)
assert_allclose(labels, [0, 0, 0, 0, 0, 1, 0, 1, 1, 0])
def test_argmaxn(self):
ind = argmaxn(self.value_lists, 3)
assert_equal(len(ind), 3)
ind = argmaxn(self.value_lists, 3)
assert_equal(np.sum(ind), np.sum([4, 6, 9]))
ind = argmaxn(self.value_lists, 3, order='asc')
assert_equal(np.sum(ind), np.sum([3, 7, 8]))
with assert_raises(ValueError):
argmaxn(self.value_lists, -1)
with assert_raises(ValueError):
argmaxn(self.value_lists, 20)
def test_get_list_diff(self):
li1 = [1, 2, 3, 4]
li2 = [2, 3, 4, 5]
li3 = [8]
ind = get_list_diff(li1, li2)
assert (ind == [1])
ind = get_list_diff(np.asarray(li2), np.asarray(li1))
assert (ind == [5])
ind = get_list_diff(li1, li1)
assert (ind == [])
ind = get_list_diff(li1, li3)
assert (ind == [1, 2, 3, 4])
def test_get_diff_elements(self):
li1 = [1, 2, 3, 4]
li2 = [2, 3, 4, 5]
li3 = [8]
ind = get_diff_elements(li1, li2)
assert (ind == [1, 5])
ind = get_diff_elements(np.asarray(li2), np.asarray(li1))
assert (ind == [5, 1])
ind = get_diff_elements(li1, li1)
assert (ind == [])
ind = get_diff_elements(li1, li3)
assert (ind == [1, 2, 3, 4, 8])
def test_get_intersection(self):
li1 = [1, 2, 3, 4]
li2 = [2, 3, 4, 5]
li3 = [8]
ind = get_intersection(li1, li2)
assert (ind == [2, 3, 4])
ind = get_intersection(np.asarray(li2), np.asarray(li1))
assert (ind == [2, 3, 4])
ind = get_intersection(li1, li1)
assert (ind == [1, 2, 3, 4])
ind = get_intersection(li1, li3)
assert (ind == [])
def tearDown(self):
pass
class TestCheckDetector(unittest.TestCase):
def setUp(self):
class DummyNegativeModel():
def fit_negative(self):
return
def decision_function_negative(self):
return
class DummyPostiveModel():
def fit(self):
return
def decision_function(self):
return
self.detector_positive = DummyPostiveModel()
self.detector_negative = DummyNegativeModel()
def test_check_detector_positive(self):
check_detector(self.detector_positive)
def test_check_detector_negative(self):
with assert_raises(AttributeError):
check_detector(self.detector_negative)
if __name__ == '__main__':
unittest.main()