Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/skimage/feature/tests/test_cascade.py

@@ -0,0 +1,23 @@
+import numpy as np
+
+import skimage.data as data
+from skimage.feature import Cascade
+
+
+def test_detector_astronaut():
+
+    # Load the trained file from the module root.
+    trained_file = data.lbp_frontal_face_cascade_filename()
+
+    # Initialize the detector cascade.
+    detector = Cascade(trained_file)
+
+    img = data.astronaut()
+
+    detected = detector.detect_multi_scale(img=img,
+                                           scale_factor=1.2,
+                                           step_ratio=1,
+                                           min_size=(60, 60),
+                                           max_size=(123, 123))
+
+    assert len(detected) == 1, 'One face should be detected.'