Move PHPUnit tests into a tests/phpunit directory.

wp-tests-config.php can/should reside in the root of a develop checkout. `phpunit` should be run from the root.

see #25088.


git-svn-id: https://develop.svn.wordpress.org/trunk@25165 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/includes/exceptions.php

@@ -0,0 +1,33 @@
+<?php
+
+class WP_Tests_Exception extends PHPUnit_Framework_Exception {
+
+}
+
+/**
+ * General exception for wp_die()
+ */
+class WPDieException extends Exception {}
+
+/**
+ * Exception for cases of wp_die(), for ajax tests.
+ * This means there was an error (no output, and a call to wp_die)
+ *
+ * @package    WordPress
+ * @subpackage Unit Tests
+ * @since      3.4.0
+ */
+class WPAjaxDieStopException extends WPDieException {}
+
+/**
+ * Exception for cases of wp_die(), for ajax tests.
+ * This means execution of the ajax function should be halted, but the unit
+ * test can continue.  The function finished normally and there was not an
+ * error (output happened, but wp_die was called to end execution)  This is
+ * used with WP_Ajax_Response::send
+ *
+ * @package    WordPress
+ * @subpackage Unit Tests
+ * @since      3.4.0
+ */
+class WPAjaxDieContinueException extends WPDieException {}