Improve test coverage

CHANGES.txt

@@ -14,4 +14,5 @@ v<0.3.4>, <05/29/2018> -- Another urgent bug fix.
 v<0.4.0>, <05/31/2018> -- Refactor all models to be sklearn compatible.
 v<0.4.1>, <06/01/2018> -- Support Python 2.7, 3.4, 3.5 and 3.6.
 v<0.4.2>, <06/01/2018> -- Fix Python 2.7 installation issue.
-v<0.4.3>, <06/01/2018> -- Add more models and refactored examples.
+v<0.4.3>, <06/02/2018> -- Add more models and refactored examples.
+v<0.4.3>, <06/03/2018> -- Refactor HBOS and add new models.

pyod/test/test_utility.py

@@ -144,6 +144,7 @@ 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.outlier_perc = 0.3
 
@@ -160,6 +161,10 @@ def test_get_label_n_equal_3(self):
         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 tearDown(self):
         pass