Pydap flaky tests (#10525)

Author: Mikejmnez

doc/whats-new.rst

@@ -25,6 +25,9 @@ Deprecations
 Bug fixes
 ~~~~~~~~~
 
+- Fix Pydap Datatree backend testing. Testing now compares elements of (unordered) two sets (before, lists) (:pull:`10525`).
+  By `Miguel Jimenez-Urias <https://github.com/Mikejmnez>`_.
+
 
 Documentation
 ~~~~~~~~~~~~~

xarray/tests/test_backends_datatree.py

@@ -495,7 +495,7 @@ def test_inherited_coords(self, url=simplegroup_datatree_url) -> None:
             |       Salinity     (time, Z, Y, X) float32 ...
         """
         tree = open_datatree(url, engine=self.engine)
-        assert list(tree.dims) == ["time", "Z", "nv"]
+        assert set(tree.dims) == set(["time", "Z", "nv"])
         assert tree["/SimpleGroup"].coords["time"].dims == ("time",)
         assert tree["/SimpleGroup"].coords["Z"].dims == ("Z",)
         assert tree["/SimpleGroup"].coords["Y"].dims == ("Y",)