Assert warnings

Aloqeely · Jun 1, 2024 · 82ac17b · 82ac17b
1 parent e90bb56
commit 82ac17b
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/pandas/tests/tools/test_to_datetime.py b/pandas/tests/tools/test_to_datetime.py
@@ -3007,9 +3007,11 @@ def test_parsers_dayfirst_yearfirst(
             result2 = Timestamp(date_str)
             assert result2 == expected
 
-        result3 = to_datetime(
-            date_str, dayfirst=dayfirst, yearfirst=yearfirst, cache=cache
-        )
+        warn = UserWarning if dayfirst else None
+        with tm.assert_produces_warning(warn, match="Could not infer format"):
+            result3 = to_datetime(
+                date_str, dayfirst=dayfirst, yearfirst=yearfirst, cache=cache
+            )
 
         result4 = DatetimeIndex([date_str], dayfirst=dayfirst, yearfirst=yearfirst)[0]