Fix test_read_metadata: descendantCount is only present when hash is enabled

The SirixDB serializer only emits descendantCount when hash is present
(rtx.getHash() != 0L). Updated test to only check for descendantCount
inside the hash-present conditional block.

Author: Johannes Lichtenberger

tests/test_resource_sync.py

@@ -98,10 +98,11 @@ def test_read_metadata():
         assert isinstance(metadata["hash"], str)
         assert len(metadata["hash"]) == 16
         assert all(c in "0123456789abcdef" for c in metadata["hash"])
+        # descendantCount is only present when hash is enabled
+        assert metadata["descendantCount"] == 0
     # Verify other metadata fields
     assert metadata["nodeKey"] == 1
     assert metadata["type"] == "ARRAY"
-    assert metadata["descendantCount"] == 0
     assert metadata["childCount"] == 0
     assert resp["value"] == []