update pytest config and un-xfail some tests (#8246)

* update pytest config and un-xfail some tests

* requires numbagg

* requires dask

* add reason

* Update xarray/tests/test_variable.py

* Update xarray/tests/test_units.py

* Apply suggestions from code review

* Update xarray/tests/test_backends.py

---------

Co-authored-by: Anderson Banihirwe <13301940+andersy005@users.noreply.github.com>

pyproject.toml

@@ -190,7 +190,9 @@ select = [
 known-first-party = ["xarray"]
 
 [tool.pytest.ini_options]
-addopts = '--strict-markers'
+addopts = ["--strict-config", "--strict-markers"]
+log_cli_level = "INFO"
+minversion = "7"
 filterwarnings = [
   "ignore:Using a non-tuple sequence for multidimensional indexing is deprecated:FutureWarning",
 ]

xarray/tests/test_backends.py

@@ -714,9 +714,6 @@ def multiple_indexing(indexers):
         ]
         multiple_indexing(indexers5)
 
-    @pytest.mark.xfail(
-        reason="zarr without dask handles negative steps in slices incorrectly",
-    )
     def test_vectorized_indexing_negative_step(self) -> None:
         # use dask explicitly when present
         open_kwargs: dict[str, Any] | None
@@ -1842,8 +1839,8 @@ def test_unsorted_index_raises(self) -> None:
         # dask first pulls items by block.
         pass
 
+    @pytest.mark.skip(reason="caching behavior differs for dask")
     def test_dataset_caching(self) -> None:
-        # caching behavior differs for dask
         pass
 
     def test_write_inconsistent_chunks(self) -> None:
@@ -2261,9 +2258,6 @@ def test_encoding_kwarg_fixed_width_string(self) -> None:
         # not relevant for zarr, since we don't use EncodedStringCoder
         pass
 
-    # TODO: someone who understand caching figure out whether caching
-    # makes sense for Zarr backend
-    @pytest.mark.xfail(reason="Zarr caching not implemented")
     def test_dataset_caching(self) -> None:
         super().test_dataset_caching()
 
@@ -2712,6 +2706,14 @@ def test_attributes(self, obj) -> None:
             with pytest.raises(TypeError, match=r"Invalid attribute in Dataset.attrs."):
                 ds.to_zarr(store_target, **self.version_kwargs)
 
+    def test_vectorized_indexing_negative_step(self) -> None:
+        if not has_dask:
+            pytest.xfail(
+                reason="zarr without dask handles negative steps in slices incorrectly"
+            )
+
+        super().test_vectorized_indexing_negative_step()
+
 
 @requires_zarr
 class TestZarrDictStore(ZarrBase):
@@ -3378,8 +3380,8 @@ def roundtrip(
         ) as ds:
             yield ds
 
+    @pytest.mark.skip(reason="caching behavior differs for dask")
     def test_dataset_caching(self) -> None:
-        # caching behavior differs for dask
         pass
 
     def test_write_inconsistent_chunks(self) -> None:
@@ -3982,7 +3984,6 @@ def test_open_mfdataset_raise_on_bad_combine_args(self) -> None:
                 with pytest.raises(ValueError, match="`concat_dim` has no effect"):
                     open_mfdataset([tmp1, tmp2], concat_dim="x")
 
-    @pytest.mark.xfail(reason="mfdataset loses encoding currently.")
     def test_encoding_mfdataset(self) -> None:
         original = Dataset(
             {
@@ -4195,7 +4196,6 @@ def test_dataarray_compute(self) -> None:
         assert computed._in_memory
         assert_allclose(actual, computed, decode_bytes=False)
 
-    @pytest.mark.xfail
     def test_save_mfdataset_compute_false_roundtrip(self) -> None:
         from dask.delayed import Delayed
 
@@ -5125,15 +5125,17 @@ def test_open_fsspec() -> None:
     ds2 = open_dataset(url, engine="zarr")
     xr.testing.assert_equal(ds0, ds2)
 
-    # multi dataset
-    url = "memory://out*.zarr"
-    ds2 = open_mfdataset(url, engine="zarr")
-    xr.testing.assert_equal(xr.concat([ds, ds0], dim="time"), ds2)
-
-    # multi dataset with caching
-    url = "simplecache::memory://out*.zarr"
-    ds2 = open_mfdataset(url, engine="zarr")
-    xr.testing.assert_equal(xr.concat([ds, ds0], dim="time"), ds2)
+    # open_mfdataset requires dask
+    if has_dask:
+        # multi dataset
+        url = "memory://out*.zarr"
+        ds2 = open_mfdataset(url, engine="zarr")
+        xr.testing.assert_equal(xr.concat([ds, ds0], dim="time"), ds2)
+
+        # multi dataset with caching
+        url = "simplecache::memory://out*.zarr"
+        ds2 = open_mfdataset(url, engine="zarr")
+        xr.testing.assert_equal(xr.concat([ds, ds0], dim="time"), ds2)
 
 
 @requires_h5netcdf

xarray/tests/test_cftimeindex.py

@@ -1135,7 +1135,6 @@ def test_to_datetimeindex_feb_29(calendar):
 
 
 @requires_cftime
-@pytest.mark.xfail(reason="https://github.com/pandas-dev/pandas/issues/24263")
 def test_multiindex():
     index = xr.cftime_range("2001-01-01", periods=100, calendar="360_day")
     mindex = pd.MultiIndex.from_arrays([index])

xarray/tests/test_options.py

@@ -165,7 +165,6 @@ def test_concat_attr_retention(self) -> None:
         result = concat([ds1, ds2], dim="dim1")
         assert result.attrs == original_attrs
 
-    @pytest.mark.xfail
     def test_merge_attr_retention(self) -> None:
         da1 = create_test_dataarray_attrs(var="var1")
         da2 = create_test_dataarray_attrs(var="var2")

xarray/tests/test_rolling.py

@@ -766,9 +766,7 @@ def test_ndrolling_construct(self, center, fill_value, dask) -> None:
         )
         assert_allclose(actual, expected)
 
-    @pytest.mark.xfail(
-        reason="See https://github.com/pydata/xarray/pull/4369 or docstring"
-    )
+    @requires_dask
     @pytest.mark.filterwarnings("error")
     @pytest.mark.parametrize("ds", (2,), indirect=True)
     @pytest.mark.parametrize("name", ("mean", "max"))

xarray/tests/test_sparse.py

@@ -147,7 +147,6 @@ def test_variable_property(prop):
                 ],
             ),
             True,
-            marks=xfail(reason="Coercion to dense"),
         ),
         param(
             do("conjugate"),
@@ -201,7 +200,6 @@ def test_variable_property(prop):
         param(
             do("reduce", func="sum", dim="x"),
             True,
-            marks=xfail(reason="Coercion to dense"),
         ),
         param(
             do("rolling_window", dim="x", window=2, window_dim="x_win"),
@@ -218,7 +216,7 @@ def test_variable_property(prop):
         param(
             do("var"), False, marks=xfail(reason="Missing implementation for np.nanvar")
         ),
-        param(do("to_dict"), False, marks=xfail(reason="Coercion to dense")),
+        param(do("to_dict"), False),
         (do("where", cond=make_xrvar({"x": 10, "y": 5}) > 0.5), True),
     ],
     ids=repr,
@@ -237,7 +235,14 @@ def test_variable_method(func, sparse_output):
         assert isinstance(ret_s.data, sparse.SparseArray)
         assert np.allclose(ret_s.data.todense(), ret_d.data, equal_nan=True)
     else:
-        assert np.allclose(ret_s, ret_d, equal_nan=True)
+        if func.meth != "to_dict":
+            assert np.allclose(ret_s, ret_d)
+        else:
+            # pop the arrays from the dict
+            arr_s, arr_d = ret_s.pop("data"), ret_d.pop("data")
+
+            assert np.allclose(arr_s, arr_d)
+            assert ret_s == ret_d
 
 
 @pytest.mark.parametrize(

xarray/tests/test_units.py

@@ -18,6 +18,7 @@
     assert_identical,
     requires_dask,
     requires_matplotlib,
+    requires_numbagg,
 )
 from xarray.tests.test_plot import PlotTestCase
 from xarray.tests.test_variable import _PAD_XR_NP_ARGS
@@ -2548,7 +2549,6 @@ def test_univariate_ufunc(self, units, error, dtype):
         assert_units_equal(expected, actual)
         assert_identical(expected, actual)
 
-    @pytest.mark.xfail(reason="needs the type register system for __array_ufunc__")
     @pytest.mark.parametrize(
         "unit,error",
         (
@@ -3849,23 +3849,21 @@ def test_computation(self, func, variant, dtype):
             method("groupby", "x"),
             method("groupby_bins", "y", bins=4),
             method("coarsen", y=2),
-            pytest.param(
-                method("rolling", y=3),
-                marks=pytest.mark.xfail(
-                    reason="numpy.lib.stride_tricks.as_strided converts to ndarray"
-                ),
-            ),
-            pytest.param(
-                method("rolling_exp", y=3),
-                marks=pytest.mark.xfail(
-                    reason="numbagg functions are not supported by pint"
-                ),
-            ),
+            method("rolling", y=3),
+            pytest.param(method("rolling_exp", y=3), marks=requires_numbagg),
             method("weighted", xr.DataArray(data=np.linspace(0, 1, 10), dims="y")),
         ),
         ids=repr,
     )
     def test_computation_objects(self, func, variant, dtype):
+        if variant == "data":
+            if func.name == "rolling_exp":
+                pytest.xfail(reason="numbagg functions are not supported by pint")
+            elif func.name == "rolling":
+                pytest.xfail(
+                    reason="numpy.lib.stride_tricks.as_strided converts to ndarray"
+                )
+
         unit = unit_registry.m
 
         variants = {

xarray/tests/test_variable.py

@@ -885,20 +885,10 @@ def test_getitem_error(self):
         "mode",
         [
             "mean",
-            pytest.param(
-                "median",
-                marks=pytest.mark.xfail(reason="median is not implemented by Dask"),
-            ),
-            pytest.param(
-                "reflect", marks=pytest.mark.xfail(reason="dask.array.pad bug")
-            ),
+            "median",
+            "reflect",
             "edge",
-            pytest.param(
-                "linear_ramp",
-                marks=pytest.mark.xfail(
-                    reason="pint bug: https://github.com/hgrecco/pint/issues/1026"
-                ),
-            ),
+            "linear_ramp",
             "maximum",
             "minimum",
             "symmetric",
@@ -2345,12 +2335,35 @@ def test_dask_rolling(self, dim, window, center):
         assert actual.shape == expected.shape
         assert_equal(actual, expected)
 
-    @pytest.mark.xfail(
-        reason="https://github.com/pydata/xarray/issues/6209#issuecomment-1025116203"
-    )
     def test_multiindex(self):
         super().test_multiindex()
 
+    @pytest.mark.parametrize(
+        "mode",
+        [
+            "mean",
+            pytest.param(
+                "median",
+                marks=pytest.mark.xfail(reason="median is not implemented by Dask"),
+            ),
+            pytest.param(
+                "reflect", marks=pytest.mark.xfail(reason="dask.array.pad bug")
+            ),
+            "edge",
+            "linear_ramp",
+            "maximum",
+            "minimum",
+            "symmetric",
+            "wrap",
+        ],
+    )
+    @pytest.mark.parametrize("xr_arg, np_arg", _PAD_XR_NP_ARGS)
+    @pytest.mark.filterwarnings(
+        r"ignore:dask.array.pad.+? converts integers to floats."
+    )
+    def test_pad(self, mode, xr_arg, np_arg):
+        super().test_pad(mode, xr_arg, np_arg)
+
 
 @requires_sparse
 class TestVariableWithSparse: