Add pdo_sqlite tests for empty filename and in-memory uri

Author: othercorey

ext/pdo_sqlite/tests/pdo_sqlite_empty_filename.phpt

@@ -0,0 +1,20 @@
+--TEST--
+PDO_sqlite: Testing empty filename
+--EXTENSIONS--
+pdo_sqlite
+--FILE--
+<?php
+
+// create with empty filename
+$db = new PDO('sqlite:');
+
+var_dump($db->exec('CREATE TABLE test1 (id INT);'));
+
+// create with empty URI
+$db = new PDO('sqlite:file:?cache=shared');
+
+var_dump($db->exec('CREATE TABLE test1 (id INT);'));
+?>
+--EXPECT--
+int(0)
+int(0)

ext/pdo_sqlite/tests/pdo_sqlite_filename_uri.phpt

@@ -5,6 +5,11 @@ pdo_sqlite
 --FILE--
 <?php
 
+// create with in-memory database
+$db = new PDO('sqlite:file::memory:?cache=shared');
+
+var_dump($db->exec('CREATE TABLE test1 (id INT);'));
+
 // create with default read-write|create mode
 $filename = "file:" . __DIR__ . DIRECTORY_SEPARATOR . "pdo_sqlite_filename_uri.db";
 
@@ -29,6 +34,7 @@ if (file_exists($filename)) {
 ?>
 --EXPECTF--
 int(0)
+int(0)
 
 Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in %s
 Stack trace: