Add test for ignored exception when .close() fails

tests/test_warnings.py

@@ -1,3 +1,6 @@
+import re
+import subprocess
+import sys
 import unittest
 import warnings
 
@@ -54,6 +57,56 @@ class WarningsTest(unittest.TestCase):
         # No warning as no cursor was instantiated.
         self.assertEquals(cm, [])
 
+    @skip_before_python(3)
+    def test_broken_close(self):
+        script = """
+import psycopg2
+
+class MyException(Exception):
+    pass
+
+class MyCurs(psycopg2.extensions.cursor):
+    def close(self):
+        raise MyException
+
+def f():
+    conn = psycopg2.connect(%(dsn)r)
+    try:
+        conn.cursor(cursor_factory=MyCurs, scrollable=True)
+    finally:
+        conn.close()
+
+f()
+""" % {"dsn": dsn}
+        p = subprocess.Popen(
+            [sys.executable, "-Walways", "-c", script],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT,
+        )
+        output, _ = p.communicate()
+        output = output.decode()
+        # Normalize line endings.
+        output = "\n".join(output.splitlines())
+        self.assertRegex(
+            output,
+            re.compile(
+                r"^Exception ignored in: "
+                r"<cursor object at 0x[0-9a-fA-F]+; closed: 0>$",
+                re.M,
+            ),
+        )
+        self.assertIn("\n__main__.MyException: \n", output)
+        self.assertRegex(
+            output,
+            re.compile(
+                r"ResourceWarning: unclosed cursor "
+                r"<cursor object at 0x[0-9a-fA-F]+; closed: 0> "
+                r"for connection "
+                r"<connection object at 0x[0-9a-fA-F]+; dsn: '.*', closed: 0>$",
+                re.M,
+            ),
+        )
+
 
 def test_suite():
     return unittest.TestLoader().loadTestsFromName(__name__)