_core_actions_get, $this->_core_actions_post ) as $action )
			if ( function_exists( 'wp_ajax_' . str_replace( '-', '_', $action ) ) )
				add_action( 'wp_ajax_' . $action, 'wp_ajax_' . str_replace( '-', '_', $action ), 1 );
		add_filter( 'wp_die_ajax_handler', array( $this, 'getDieHandler' ), 1, 1 );
		if ( !defined( 'DOING_AJAX' ) )
			define( 'DOING_AJAX', true );
		set_current_screen( 'ajax' );
		// Clear logout cookies
		add_action( 'clear_auth_cookie', array( $this, 'logout' ) );
		// Suppress warnings from "Cannot modify header information - headers already sent by"
		$this->_error_level = error_reporting();
		error_reporting( $this->_error_level & ~E_WARNING );
		// Make some posts
		$this->factory->post->create_many( 5 );
	}
	/**
	 * Tear down the test fixture.
	 * Reset $_POST, remove the wp_die() override, restore error reporting
	 */
	public function tearDown() {
		parent::tearDown();
		$_POST = array();
		$_GET = array();
		unset( $GLOBALS['post'] );
		unset( $GLOBALS['comment'] );
		remove_filter( 'wp_die_ajax_handler', array( $this, 'getDieHandler' ), 1, 1 );
		remove_action( 'clear_auth_cookie', array( $this, 'logout' ) );
		error_reporting( $this->_error_level );
		set_current_screen( 'front' );
	}
	/**
	 * Clear login cookies, unset the current user
	 */
	public function logout() {
		unset( $GLOBALS['current_user'] );
		$cookies = array(AUTH_COOKIE, SECURE_AUTH_COOKIE, LOGGED_IN_COOKIE, USER_COOKIE, PASS_COOKIE);
		foreach ( $cookies as $c )
			unset( $_COOKIE[$c] );
	}
	/**
	 * Return our callback handler
	 * @return callback
	 */
	public function getDieHandler() {
		return array( $this, 'dieHandler' );
	}
	/**
	 * Handler for wp_die()
	 * Save the output for analysis, stop execution by throwing an exception.
	 * Error conditions (no output, just die) will throw WPAjaxDieStopException( $message )
	 * You can test for this with:
	 * 
	 * $this->setExpectedException( 'WPAjaxDieStopException', 'something contained in $message' );
	 * 
	 * Normal program termination (wp_die called at then end of output) will throw WPAjaxDieContinueException( $message )
	 * You can test for this with:
	 * 
	 * $this->setExpectedException( 'WPAjaxDieContinueException', 'something contained in $message' );
	 * 
	 * @param string $message
	 */
	public function dieHandler( $message ) {
		$this->_last_response .= ob_get_clean();
		if ( '' === $this->_last_response ) {
			if ( is_scalar( $message ) ) {
				throw new WPAjaxDieStopException( (string) $message );
			} else {
				throw new WPAjaxDieStopException( '0' );
			}
		} else {
			throw new WPAjaxDieContinueException( $message );
		}
	}
	/**
	 * Switch between user roles
	 * E.g. administrator, editor, author, contributor, subscriber
	 * @param string $role
	 */
	protected function _setRole( $role ) {
		$post = $_POST;
		$user_id = $this->factory->user->create( array( 'role' => $role ) );
		wp_set_current_user( $user_id );
		$_POST = array_merge($_POST, $post);
	}
	/**
	 * Mimic the ajax handling of admin-ajax.php
	 * Capture the output via output buffering, and if there is any, store
	 * it in $this->_last_message.
	 * @param string $action
	 */
	protected function _handleAjax($action) {
		// Start output buffering
		ini_set( 'implicit_flush', false );
		ob_start();
		// Build the request
		$_POST['action'] = $action;
		$_GET['action']  = $action;
		$_REQUEST        = array_merge( $_POST, $_GET );
		// Call the hooks
		do_action( 'admin_init' );
		do_action( 'wp_ajax_' . $_REQUEST['action'], null );
		// Save the output
		$buffer = ob_get_clean();
		if ( !empty( $buffer ) )
			$this->_last_response = $buffer;
	}
}