# -*- coding: utf-8 -*- import os import sys import unittest import numpy as np from sklearn.model_selection import train_test_split from sklearn.tree import DecisionTreeClassifier from sklearn.linear_model import LogisticRegression from sklearn.ensemble import GradientBoostingClassifier from sklearn.ensemble import RandomForestClassifier from sklearn.neighbors import KNeighborsClassifier from sklearn.datasets import load_breast_cancer # noinspection PyProtectedMember from sklearn.utils.testing import assert_allclose from sklearn.utils.testing import assert_array_less from sklearn.utils.testing import assert_equal from sklearn.utils.testing import assert_greater from sklearn.utils.testing import assert_greater_equal from sklearn.utils.testing import assert_less_equal from sklearn.utils.testing import assert_raises from sklearn.metrics import roc_auc_score from sklearn.metrics import accuracy_score # temporary solution for relative imports in case combo is not installed # if combo is installed, no need to use the following line sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))) from combo.models.classifier_des import DES_LA from combo.utils.data import evaluate_print class TestDEC_LA(unittest.TestCase): def setUp(self): self.roc_floor = 0.9 self.accuracy_floor = 0.9 random_state = 42 X, y = load_breast_cancer(return_X_y=True) self.X_train, self.X_test, self.y_train, self.y_test = \ train_test_split(X, y, test_size=0.4, random_state=random_state) classifiers = [DecisionTreeClassifier(random_state=random_state), LogisticRegression(random_state=random_state), KNeighborsClassifier(), RandomForestClassifier(random_state=random_state), GradientBoostingClassifier(random_state=random_state)] self.clf = DES_LA(classifiers, local_region_size=30) self.clf.fit(self.X_train, self.y_train) def test_parameters(self): assert (hasattr(self.clf, 'base_estimators') and self.clf.base_estimators is not None) def test_train_scores(self): y_train_predicted = self.clf.predict(self.X_train) assert_equal(len(y_train_predicted), self.X_train.shape[0]) # check performance assert_greater(accuracy_score(self.y_train, y_train_predicted), self.accuracy_floor) def test_prediction_scores(self): y_test_predicted = self.clf.predict(self.X_test) assert_equal(len(y_test_predicted), self.X_test.shape[0]) # check performance assert_greater(accuracy_score(self.y_test, y_test_predicted), self.accuracy_floor) # test utility function evaluate_print('averaging', self.y_test, y_test_predicted) def test_prediction_proba(self): y_test_predicted = self.clf.predict_proba(self.X_test) assert_greater_equal(y_test_predicted.min(), 0) assert_less_equal(y_test_predicted.max(), 1) # check performance assert_greater(roc_auc_score(self.y_test, y_test_predicted[:, 1]), self.roc_floor) # check shape of integrity n_classes = len(np.unique(self.y_train)) assert_equal(y_test_predicted.shape, (self.X_test.shape[0], n_classes)) # check probability sum is 1 y_test_predicted_sum = np.sum(y_test_predicted, axis=1) assert_allclose(np.ones([self.X_test.shape[0], ]), y_test_predicted_sum) def test_fit_predict(self): with assert_raises(NotImplementedError): y_train_predicted = self.clf.fit_predict(self.X_train, self.y_train) def tearDown(self): pass if __name__ == '__main__': unittest.main()