add test for different formatted dsn string in pdo construct

test/pdo_sqlsrv/pdo_construct_dsn_format_incorrect.phpt

@@ -0,0 +1,113 @@
+--TEST--
+Test PDO::__Construct without specifying the Server
+--SKIPIF--
+
+--FILE--
+<?php
+  
+require_once("autonomous_setup.php");
+
+/*----------Connection option cases that raises errors----------*/
+//dsn with 2 consecutive semicolons
+
+try 
+{   
+    $conn = new PDO( "sqlsrv:Server = $serverName;;", $username, $password );
+}
+catch( PDOException $e ) {
+    print_r( ($e->errorInfo)[2] );
+    echo "\n";
+}
+
+//dsn with double right curly braces
+try 
+{   
+    $conn = new PDO( "sqlsrv:Server =$serverName; Database = {tempdb}}", $username, $password );
+}
+catch( PDOException $e ) {
+    print_r( ($e->errorInfo)[2] );
+    echo "\n";
+}
+
+//dsn with double right curly braces and semicolon
+try 
+{   
+    $conn = new PDO( "sqlsrv:Server =$serverName; Database = {tempdb}};", $username, $password );
+}
+catch( PDOException $e ) {
+    print_r( ($e->errorInfo)[2] );
+    echo "\n";
+}
+
+//dsn with right curly braces and other symbol
+try 
+{   
+    $conn = new PDO( "sqlsrv:Server =$serverName; Database = {tempdb}?", $username, $password );
+}
+catch( PDOException $e ) {
+    print_r( ($e->errorInfo)[2] );
+    echo "\n";
+}
+
+//dsn with no equal sign in one option
+try 
+{   
+    $conn = new PDO( "sqlsrv:Server =$serverName; Database", $username, $password );
+}
+catch( PDOException $e ) {
+    print_r( ($e->errorInfo)[2] );
+    echo "\n";
+}
+
+//dsn with no keys
+try 
+{   
+    // Try to connect with no server specific
+    @$conn = new PDO( "sqlsrv:", $username, $password );
+}
+catch( PDOException $e ) {
+    print_r( ($e->errorInfo)[2] );
+    echo "\n";
+}
+
+echo "\n";
+/*----------Connection option cases that is OK----------*/
+
+try 
+{   
+    //dsn with curly braces
+    $conn = new PDO( "sqlsrv:Server =$serverName; Database = {tempdb}", $username, $password );
+    echo "value in curly braces OK\n";
+    
+    //dsn with curly braces and semicolon
+    @$conn = new PDO( "sqlsrv:Server =$serverName; Database = {tempdb};", $username, $password );
+    echo "value in curly braces followed by a semicolon OK\n";
+    
+    //dsn with curly braces and trailing spaces
+    @$conn = new PDO( "sqlsrv:Server =$serverName; Database = {tempdb}    ", $username, $password );
+    echo "value in curly braces followed by trailing spaces OK\n";
+    
+    //dsn with no value specified and ends with semicolon
+    $conn = new PDO( "sqlsrv:Server =$serverName; Database = ;", $username, $password );
+    echo "dsn with no value specified and ends with semicolon OK\n";
+}
+catch( PDOException $e ) {
+    print_r( ($e->errorInfo)[2] );
+}
+
+
+?> 
+
+--EXPECT--
+
+An extra semi-colon was encountered in the DSN string at character (byte-count) position '24' .
+An unescaped right brace (}) was found in the DSN string for keyword  'Database'.  All right braces must be escaped with another right brace (}}).
+An expected right brace (}) was not found in the DSN string for the value of the keyword 'Database'.
+An invalid value was specified for the keyword 'Database' in the DSN string.
+The DSN string ended unexpectedly.
+An invalid DSN string was specified.
+
+value in curly braces OK
+value in curly braces followed by a semicolon OK
+value in curly braces followed by trailing spaces OK
+dsn with no value specified and ends with semicolon OK