Updated unit tests for GPS

Author: Marek Szymczuk

tests/PHPExif/Mapper/NativeMapperTest.php

@@ -175,17 +175,25 @@ public function testMapRawDataFlattensRawDataWithSections()
      */
     public function testMapRawDataCorrectlyFormatsGPSData()
     {
-        $result = $this->mapper->mapRawData(
-            array(
+        $expected = array(
+            '40.333452380952,-20.167314814815' => array(
                 'GPSLatitude'     => array('40/1', '20/1', '15/35'),
                 'GPSLatitudeRef'  => 'N',
                 'GPSLongitude'    => array('20/1', '10/1', '35/15'),
                 'GPSLongitudeRef' => 'W',
-            )
+            ),
+            '0,-0' => array(
+                'GPSLatitude'     => array('0/0', '0/0', '0/0'),
+                'GPSLatitudeRef'  => 'N',
+                'GPSLongitude'    => array('0/0', '0/0', '0/0'),
+                'GPSLongitudeRef' => 'W',
+            ),
         );
 
-        $expected = '40.333452380952,-20.167314814815';
-        $this->assertEquals($expected, reset($result));
+        foreach ($expected as $key => $value) {
+            $result = $this->mapper->mapRawData($value);
+            $this->assertEquals($key, reset($result));
+        }
     }
 
     public function testMapRawDataCorrectlyFormatsDifferentDateTimeString()