symfony
diff --git a/‎src/Symfony/Component/DomCrawler/Field/FileFormField.php
Lines changed: 9 additions & 3 deletions b/‎src/Symfony/Component/DomCrawler/Field/FileFormField.php
Lines changed: 9 additions & 3 deletions
diff --git a/‎src/Symfony/Component/DomCrawler/Tests/Field/FileFormFieldTest.php
Lines changed: 18 additions & 0 deletions b/‎src/Symfony/Component/DomCrawler/Tests/Field/FileFormFieldTest.php
Lines changed: 18 additions & 0 deletions
diff --git a/‎src/Symfony/Component/DomCrawler/Tests/Fixtures/no-extension
Lines changed: 1 addition & 0 deletions b/‎src/Symfony/Component/DomCrawler/Tests/Fixtures/no-extension
Lines changed: 1 addition & 0 deletions
@@ -59,11 +59,17 @@ public function setValue($value)
         if (null !== $value && is_readable($value)) {
             $error = UPLOAD_ERR_OK;
             $size = filesize($value);
-            $name = basename($value);
+            $info = pathinfo($value);
+            $name = $info['basename'];
 
             // copy to a tmp location
-            $tmp = tempnam(sys_get_temp_dir(), 'upload');
-            unlink($tmp);
+            $tmp = sys_get_temp_dir().'/'.sha1(uniqid(mt_rand(), true));
+            if (array_key_exists('extension', $info)) {
+                $tmp .= '.'.$info['extension'];
+            }
+            if (is_file($tmp)) {
+                unlink($tmp);
+            }
             copy($value, $tmp);
             $value = $tmp;
         } else {
 
@@ -56,8 +56,26 @@ public function testSetValue($method)
         $this->assertEquals(basename(__FILE__), $value['name'], "->$method() sets the name of the file field");
         $this->assertEquals('', $value['type'], "->$method() sets the type of the file field");
         $this->assertInternalType('string', $value['tmp_name'], "->$method() sets the tmp_name of the file field");
+        $this->assertFileExists($value['tmp_name'], "->$method() creates a copy of the file at the tmp_name path");
         $this->assertEquals(0, $value['error'], "->$method() sets the error of the file field");
         $this->assertEquals(filesize(__FILE__), $value['size'], "->$method() sets the size of the file field");
+
+        $origInfo = pathinfo(__FILE__);
+        $tmpInfo = pathinfo($value['tmp_name']);
+        $this->assertEquals(
+            $origInfo['extension'],
+            $tmpInfo['extension'],
+            "->$method() keeps the same file extension in the tmp_name copy"
+        );
+
+        $field->$method(__DIR__.'/../Fixtures/no-extension');
+        $value = $field->getValue();
+
+        $this->assertArrayNotHasKey(
+            'extension',
+            pathinfo($value['tmp_name']),
+            "->$method() does not add a file extension in the tmp_name copy"
+        );
     }
 
     public function getSetValueMethods()
 
@@ -0,0 +1 @@
+Test