Merge pull request #826 from dcs4cop/forman-xxx-use_stac_datacubes_ext

Use STAC datacube extension

Author: forman

CHANGES.md

@@ -47,9 +47,11 @@
   Zarr files from Azure bolb storage using the new `abfs` data store. 
 
 * Added a catalog API compliant to [STAC](https://stacspec.org/en/) to 
-  xcube server. 
-  It serves a single collection named "datasets" whose items are the
-  datasets published by the service. (#455)
+  xcube server. (#455)
+  - It serves a single collection named "datacubes" whose items are the
+    datasets published by the service. 
+  - The collection items make use the STAC 
+    [datacube](https://github.com/stac-extensions/datacube) extension. 
 
 * Simplified the cloud deployment of xcube server/viewer applications (#815). 
   This has been achieved by the following new xcube server features:

test/util/test_jsonencoder.py

@@ -161,6 +161,12 @@ def test_numpy_arrays(self):
         self.assertIsNot(array, to_json_value(array))
         self.assertEqual([], to_json_value(array))
 
+        array = numpy.array(["2020-01-02 10:00:05",
+                             "2020-01-03 14:10:36"], dtype=np.datetime64)
+        self.assertIsNot(array, to_json_value(array))
+        self.assertEqual(['2020-01-02T10:00:05Z',
+                          '2020-01-03T14:10:36Z'], to_json_value(array))
+
     # noinspection PyMethodMayBeStatic
     def test_fails_correctly(self):
         with pytest.raises(TypeError,