Improve test behaviour

include/dba.php

@@ -955,6 +955,8 @@ class dba {
 	 * @return boolean Was the command executed successfully?
 	 */
 	public static function rollback() {
+		$ret = false;
+
 		switch (self::$driver) {
 			case 'pdo':
 				if (!self::$db->inTransaction()) {

src/App.php

@@ -412,11 +412,17 @@ class App
 	public function set_baseurl($url)
 	{
 		$parsed = @parse_url($url);
+		$hostname = '';
 
 		if (x($parsed)) {
+			if (!empty($parsed['scheme'])) {
 				$this->scheme = $parsed['scheme'];
+			}
 
+			if (!empty($parsed['host'])) {
 				$hostname = $parsed['host'];
+			}
+
 			if (x($parsed, 'port')) {
 				$hostname .= ':' . $parsed['port'];
 			}

src/Object/Image.php

@@ -781,12 +781,10 @@ class Image
 			$img_str = Network::fetchUrl($url, true, $redirects, 4);
 			$filesize = strlen($img_str);
 
-			// The tests are failing with an read error. This can be caused by memory shortage
-			// See https://stackoverflow.com/questions/10175758/getimagesize-read-error
-			// So we use the alternate method instead
-			//if (function_exists("getimagesizefromstring")) {
-			//	$data = getimagesizefromstring($img_str);
-			//} else {
+			try {
+				if (function_exists("getimagesizefromstring")) {
+					$data = getimagesizefromstring($img_str);
+				} else {
 					$tempfile = tempnam(get_temppath(), "cache");
 
 					$a = get_app();
@@ -796,7 +794,10 @@ class Image
 
 					$data = getimagesize($tempfile);
 					unlink($tempfile);
-			//}
+				}
+			} catch (Exception $e) {
+				return false;
+			}
 
 			if ($data) {
 				$data["size"] = $filesize;