Try to add a test that exercise partial decompress of non-contiguous.

Author: Carreau

zarr/tests/test_core.py

@@ -2443,3 +2443,9 @@ def test_hexdigest(self):
         z = self.create_array(shape=(1050,), chunks=100, dtype='<i4')
         z.attrs['foo'] = 'bar'
         assert '05b0663ffe1785f38d3a459dec17e57a18f254af' == z.hexdigest()
+
+    def test_non_cont(self):
+        z = self.create_array(shape=(500,500, 500), chunks=(50, 50, 50), dtype='<i4')
+        z[:,:,:] = 0
+        # actually go through the partial read by accessing a single item
+        assert z[0,:,0].any()