add test for warnings at connection and statement levels

test/pdo_sqlsrv/pdo_warnings.phpt

@@ -0,0 +1,31 @@
+--TEST--
+Test warnings on connection and statement levels
+--SKIPIF--
+
+--FILE--
+<?php
+    require_once("autonomous_setup.php");
+
+    $conn = new PDO( "sqlsrv:Server=$serverName; Database = tempdb ", $username, $password);
+    $conn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING );
+    
+    // raise a warning in connection
+    $conn->getAttribute( PDO::ATTR_TIMEOUT );
+    
+    $conn->exec("IF OBJECT_ID('table1', 'U') IS NOT NULL DROP TABLE table1");
+    
+    // raise a warning in statement
+    $statement = $conn->prepare("CRATE TABLE table1(id INT NOT NULL PRIMARY KEY, val VARCHAR(10)) ");
+    $statement->execute();
+
+    
+?>
+--EXPECTREGEX--
+Warning: SQLSTATE: IMSSP
+Error Code: -38
+Error Message: An unsupported attribute was designated on the PDO object\.
+ in .+(\/|\\)pdo_warnings\.php on line [0-9]+
+
+Warning: PDO::getAttribute\(\): SQLSTATE\[IM001\]: Driver does not support this function: driver does not support that attribute in .+(\/|\\)pdo_warnings\.php on line [0-9]+
+
+Warning: PDOStatement::execute\(\): SQLSTATE\[42000\]: Syntax error or access violation: 156 \[Microsoft\]\[ODBC Driver [0-9]+ for SQL Server\]\[SQL Server\]Incorrect syntax near the keyword 'TABLE'\. in .+(\/|\\)pdo_warnings\.php on line [0-9]+