Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/skimage/measure/tests/test_entropy.py

@@ -0,0 +1,16 @@
+import numpy as np
+from skimage.measure import shannon_entropy
+
+from skimage._shared.testing import assert_almost_equal
+
+
+def test_shannon_ones():
+    img = np.ones((10, 10))
+    res = shannon_entropy(img, base=np.e)
+    assert_almost_equal(res, 0.0)
+
+
+def test_shannon_all_unique():
+    img = np.arange(64)
+    res = shannon_entropy(img, base=2)
+    assert_almost_equal(res, np.log(64) / np.log(2))