Temporarily xfail two tests (#145)

- Add .testing.MARK for reusable marks.

genno/testing/__init__.py

@@ -3,6 +3,7 @@
 import sys
 from contextlib import nullcontext
 from functools import partial
+from importlib.metadata import version
 from itertools import chain, islice
 from typing import TYPE_CHECKING, ContextManager, Dict
 
@@ -33,6 +34,14 @@
 
 log = logging.getLogger(__name__)
 
+# Common marks used in multiple places. Do not reuse keys.
+MARK = {
+    "issue/145": pytest.mark.xfail(
+        condition="2024.10.0" == version("xarray"),
+        reason="with SparseDataArray only (https://github.com/pydata/xarray/issues/9694)",
+    ),
+}
+
 # Pytest hooks
 
 

genno/tests/core/test_quantity.py

@@ -21,6 +21,7 @@
 from genno.core.quantity import assert_quantity, get_class, set_class
 from genno.core.sparsedataarray import SparseDataArray
 from genno.testing import (
+    MARK,
     add_large_data,
     assert_qty_allclose,
     assert_qty_equal,
@@ -481,6 +482,7 @@ def test_sel(self, tri, args, dropped) -> None:
 
         assert ({"y"} if dropped else {"x", "y"}) == set(result.dims)
 
+    @MARK["issue/145"]
     def test_sel_xarray(self, tri) -> None:
         """xarray-style indexing works."""
         # Create indexers

genno/tests/test_operator.py

@@ -18,6 +18,7 @@
 from genno import Computer, operator
 from genno.core.sparsedataarray import SparseDataArray
 from genno.testing import (
+    MARK,
     add_large_data,
     add_test_data,
     assert_logs,
@@ -844,6 +845,7 @@ def test_select0(data, indexers, kwargs, exp_dims, exp_shape) -> None:
         assert exp_shape == result.size
 
 
+@MARK["issue/145"]
 def test_select1(data) -> None:
     # Unpack
     *_, t_foo, t_bar, x = data