Added tests

skimage/filter/tests/test_harris.py

@@ -0,0 +1,23 @@
+import numpy as np
+
+import unittest
+
+from skimage.filter import harris_corner_detector
+
+
+class TestHarris(unittest.TestCase):
+
+    def test_square_image(self):
+        im = np.zeros((50, 50)).astype(float)
+        im[:25, :25] = 1.
+        results = harris_corner_detector(im)
+        self.assertTrue(results.any())
+        self.assertTrue(len(results) == 1)
+
+    def test_noisy_square_image(self):
+        im = np.zeros((50, 50)).astype(float)
+        im[:25, :25] = 1.
+        im = im + np.random.uniform(size=im.shape) * .5
+        results = harris_corner_detector(im)
+        assert results.any()
+        assert len(results) == 1