Fix #44 : throw an exception in case of older ffprobe

src/FFMpeg/FFProbe/OptionsTester.php

@@ -11,8 +11,10 @@
 
 namespace FFMpeg\FFProbe;
 
+use Alchemy\BinaryDriver\Exception\ExecutionFailureException;
 use Doctrine\Common\Cache\Cache;
 use FFMpeg\Driver\FFProbeDriver;
+use FFMpeg\Exception\RuntimeException;
 
 class OptionsTester implements OptionsTesterInterface
 {
@@ -55,7 +57,11 @@ class OptionsTester implements OptionsTesterInterface
             return $this->cache->fetch($id);
         }
 
+        try {
             $output = $this->ffprobe->command(array('-help', '-loglevel', 'quiet'));
+        } catch (ExecutionFailureException $e) {
+            throw new RuntimeException('Your FFProbe version is too old and does not support `-help` option, please upgrade.', $e->getCode(), $e);
+        }
 
         $this->cache->save($id, $output);
 

tests/FFMpeg/Tests/FFProbe/OptionsTesterTest.php

@@ -2,11 +2,30 @@
 
 namespace FFMpeg\Tests\FFProbe;
 
+use Alchemy\BinaryDriver\Exception\ExecutionFailureException;
 use FFMpeg\Tests\TestCase;
 use FFMpeg\FFProbe\OptionsTester;
 
 class OptionsTesterTest extends TestCase
 {
+    /**
+     * @expectedException FFMpeg\Exception\RuntimeException
+     * @expectedExceptionMessage Your FFProbe version is too old and does not support `-help` option, please upgrade.
+     */
+    public function testHasOptionWithOldFFProbe()
+    {
+        $cache = $this->getCacheMock();
+
+        $ffprobe = $this->getFFProbeDriverMock();
+        $ffprobe->expects($this->once())
+            ->method('command')
+            ->with(array('-help', '-loglevel', 'quiet'))
+            ->will($this->throwException(new ExecutionFailureException('Failed to execute')));
+
+        $tester = new OptionsTester($ffprobe, $cache);
+        $tester->has('-print_format');
+    }
+
     /**
      * @dataProvider provideOptions
      */