better comments

Author: mathause

xarray/tests/test_testing.py

@@ -155,21 +155,21 @@ def __array__(self):
     a = WarningVariable("x", [1])
     b = WarningVariable("x", [2])
 
-    # elevate warnings to errors
-    warnings.filterwarnings("error")
-
     with warnings.catch_warnings(record=True) as w:
+        warnings.filterwarnings("error")
+        # elevate warnings to errors
         with pytest.raises(AssertionError):
             getattr(xr.testing, func)(a, b)
 
         assert len(w) > 0
 
-    # ensure warnings still raise outside of assert_*
-    with pytest.raises(UserWarning):
-        warnings.warn("test")
+        # ensure warnings still raise outside of assert_*
+        with pytest.raises(UserWarning):
+            warnings.warn("test")
 
+    # ensure warnings stay ignored in assert_*
     with warnings.catch_warnings(record=True) as w:
-        # elevate warnings to errors
+        # ignore warnings
         warnings.filterwarnings("ignore")
         with pytest.raises(AssertionError):
             getattr(xr.testing, func)(a, b)