TST: add test for resizing 2D image with a 3D output shape

skimage/transform/tests/test_warps.py

@@ -181,6 +181,18 @@ def test_resize3d_resize():
     assert_almost_equal(resized, ref)
 
 
+
+def test_resize3d_2din_3dout():
+    # 3D output with 2D input
+    x = np.zeros((5, 5), dtype=np.double)
+    x[1, 1] = 1
+    resized = resize(x, (10, 10, 1), order=0)
+    ref = np.zeros((10, 10, 1))
+    ref[2:4, 2:4] = 1
+    assert_almost_equal(resized, ref)
+
+
+
 def test_resize3d_bilinear():
     # bilinear 3rd dimension
     x = np.zeros((5, 5, 2), dtype=np.double)