TST: Separate expanding_apply and rolling_apply out of consistency (pandas-dev#33817)

Author: charlesdong1991

pandas/tests/window/moments/test_moments_expanding.py

@@ -368,6 +368,14 @@ def test_expanding_consistency(self, min_periods):
                 ),
             )
 
+    @pytest.mark.parametrize("min_periods", [0, 1, 2, 3, 4])
+    def test_expanding_apply_consistency(self, min_periods):
+        with warnings.catch_warnings():
+            warnings.filterwarnings(
+                "ignore",
+                message=".*(empty slice|0 for slice).*",
+                category=RuntimeWarning,
+            )
             # test consistency between expanding_xyz() and either (a)
             # expanding_apply of Series.xyz(), or (b) expanding_apply of
             # np.nanxyz()

pandas/tests/window/moments/test_moments_rolling.py

@@ -1013,6 +1013,17 @@ def test_rolling_consistency(self, window, min_periods, center):
                 ),
             )
 
+    @pytest.mark.parametrize(
+        "window,min_periods,center", list(_rolling_consistency_cases())
+    )
+    def test_rolling_apply_consistency(self, window, min_periods, center):
+
+        with warnings.catch_warnings():
+            warnings.filterwarnings(
+                "ignore",
+                message=".*(empty slice|0 for slice).*",
+                category=RuntimeWarning,
+            )
             # test consistency between rolling_xyz() and either (a)
             # rolling_apply of Series.xyz(), or (b) rolling_apply of
             # np.nanxyz()