Rerun failed tests

Chromedriver on Travis got crazy lately for no obvious reason. This should help us keeping stability of the builds.

Author: OndraM

tests/functional/WebDriverTestCase.php

@@ -17,6 +17,7 @@
 
 use Facebook\WebDriver\Chrome\ChromeOptions;
 use Facebook\WebDriver\Exception\NoSuchWindowException;
+use Facebook\WebDriver\Exception\WebDriverException;
 use Facebook\WebDriver\Remote\DesiredCapabilities;
 use Facebook\WebDriver\Remote\RemoteWebDriver;
 use Facebook\WebDriver\Remote\WebDriverBrowserType;
@@ -133,6 +134,30 @@ public static function skipForJsonWireProtocol($message = 'Not supported by Json
         }
     }
 
+    /**
+     * Rerun failed tests.
+     * @TODO Replace with PHPUnit 7.3+ builtin functionality once upgraded to PHP 7.1+
+     */
+    public function runBare()
+    {
+        $e = null;
+        $numberOfRetires = 3;
+
+        for ($i = 0; $i < $numberOfRetires; ++$i) {
+            try {
+                parent::runBare();
+
+                return;
+            } catch (WebDriverException $e) {
+                // repeat
+            }
+        }
+
+        if ($e !== null) {
+            throw $e;
+        }
+    }
+
     /**
      * Get the URL of given test HTML on running webserver.
      *