test_issues.py 文件源码

def test_issue_491(self):
        """ Test warning propagation """
        conn = pymysql.connect(charset="utf8", **self.databases[0])

        with warnings.catch_warnings():
            # Ignore all warnings other than pymysql generated ones
            warnings.simplefilter("ignore")
            warnings.simplefilter("error", category=pymysql.Warning)

            # verify for both buffered and unbuffered cursor types
            for cursor_class in (cursors.Cursor, cursors.SSCursor):
                c = conn.cursor(cursor_class)
                try:
                    c.execute("SELECT CAST('124b' AS SIGNED)")
                    c.fetchall()
                except pymysql.Warning as e:
                    # Warnings should have errorcode and string message, just like exceptions
                    self.assertEqual(len(e.args), 2)
                    self.assertEqual(e.args[0], 1292)
                    self.assertTrue(isinstance(e.args[1], text_type))
                else:
                    self.fail("Should raise Warning")
                finally:
                    c.close()