added test for lastinsertid

test/pdo_sqlsrv/pdo_lastInsertId.phpt

@@ -0,0 +1,58 @@
+--TEST--
+Test the PDO::lastInsertId() method.
+--SKIPIF--
+--FILE--
+<?php
+  
+require_once("autonomous_setup.php");
+   
+try 
+{         
+	$database = "tempdb";
+    $conn = new PDO("sqlsrv:Server=$serverName;Database=$database", $username, $password);
+	
+	$conn->exec("IF OBJECT_ID('tmp_table1', 'U') IS NOT NULL DROP TABLE [tmp_table1]");	
+	$conn->exec("IF OBJECT_ID('tmp_table2', 'U') IS NOT NULL DROP TABLE [tmp_table2]");	
+	$conn->exec("IF OBJECT_ID('tmp_table3', 'U') IS NOT NULL DROP TABLE [tmp_table3]");	
+	$conn->exec('CREATE TABLE tmp_table1(id INT IDENTITY(100,2), val INT)');
+	$conn->exec('CREATE TABLE tmp_table2(id INT IDENTITY(200,2), val INT)');
+	$conn->exec('CREATE TABLE tmp_table3(id INT, val INT)');
+	
+	$conn->exec('INSERT INTO tmp_table1 VALUES(1)');
+	$conn->exec('INSERT INTO tmp_table2 VALUES(2)');
+	$id = $conn->lastInsertId();
+	var_dump($id);
+	$id = $conn->lastInsertId('tmp_table1');
+	var_dump($id);
+	
+	$conn->exec('INSERT INTO tmp_table2 VALUES(3)');
+	$conn->exec('INSERT INTO tmp_table1 VALUES(4)');
+	$id = $conn->lastInsertId();
+	var_dump($id);
+	$id = $conn->lastInsertId('tmp_table2');
+	var_dump($id);
+	
+	// Should return empty string as the table does not have an IDENTITY column.
+	$conn->exec('INSERT INTO tmp_table3 VALUES(1,1)');
+	$id = $conn->lastInsertId();
+	var_dump($id);
+		
+	// clean up
+	$conn->exec('DROP TABLE tmp_table1');
+	$conn->exec('DROP TABLE tmp_table2');
+	$conn->exec('DROP TABLE tmp_table3');
+}
+
+catch( PDOException $e ) {
+    var_dump( $e );
+    exit;
+}
+
+
+?> 
+--EXPECT--
+string(3) "200"
+string(3) "100"
+string(3) "102"
+string(3) "202"
+string(0) ""