- A new style of warning can be emitted which will "filter" up to

N occurrences of a parameterized string.   This allows parameterized
warnings that can refer to their arguments to be delivered a fixed
number of times until allowing Python warning filters to squelch them,
and prevents memory from growing unbounded within Python's
warning registries.
fixes #3178

1 files changed, 14 insertions, 0 deletions

diff --git a/test/aaa_profiling/test_memusage.py b/test/aaa_profiling/test_memusage.py
index d1d3b385a..d4ed1fe2e 100644
--- a/test/aaa_profiling/test_memusage.py
+++ b/test/aaa_profiling/test_memusage.py
@@ -17,7 +17,9 @@ from sqlalchemy.testing.util import gc_collect
 import decimal
 import gc
 from sqlalchemy.testing import fixtures
+from sqlalchemy import util
 import weakref
+import itertools
 
 
 class A(fixtures.ComparableEntity):
@@ -376,6 +378,18 @@ class MemUsageTest(EnsureZeroed):
         finally:
             metadata.drop_all()
 
+    def test_warnings_util(self):
+        counter = itertools.count()
+        import warnings
+        warnings.filterwarnings("ignore", "memusage warning.*")
+
+        @profile_memory()
+        def go():
+            util.warn_limited(
+                "memusage warning, param1: %s, param2: %s",
+                next(counter), next(counter))
+        go()
+
     def test_mapper_reset(self):
         metadata = MetaData(self.engine)