added -help flag to testrunner

tests/run.php

@@ -464,6 +464,18 @@ if(isset($options["filter"])){
     $filter = $options["filter"];
 }
 
+if (isset($options["help"])) {
+    echo "Doctrine test runner help\n";
+    echo "===========================\n";
+    echo " To run all tests simply run this script without arguments. \n";
+    echo "\n Flags:\n";
+    echo " -coverage will generate coverage report data that can be viewed with the cc.php script in this folder. NB! This takes time. You need xdebug to run this\n";
+    echo " -group <groupName1> <groupName2> <className1> Use this option to run just a group of tests or tests with a given classname. Groups are currently defined as the variable name they are called in this script. \n";
+   echo " - filter <string1> <string2> case insensitive strings that will be applied to the className of the tests. A test_classname must contain all of these strings to be run\n"; 
+    echo "\nAvailable groups:\n tickets\n";
+    die();
+}
+
 if (isset($options["coverage"])) {
     xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
     $testGroup->run($reporter, $filter);