;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name:     assert.lisp
;;;; Purpose:  Assert functions for XLUnit
;;;; Author:   Kevin Rosenberg
;;;;
;;;; $Id: assert.lisp,v 1.1 2003/08/04 12:01:54 kevin Exp $
;;;; *************************************************************************

(in-package #:xlunit)


;;; Assertions

(define-condition test-failure-condition (simple-condition) 
  ((msg :initform nil :initarg :msg :accessor msg))
  (:documentation "Base class for all test failures."))


(defun failure (format-str &rest args)
  "Signal a test failure and exit the test."
  (signal 'test-failure-condition
	  :format-control format-str
	  :format-arguments args))

(defmacro test-assert (test &optional msg)
  `(unless ,test
    (failure "Test assertion: ~s" ',test)))

(defun assert-equal (v1 v2 &optional msg)
  (unless (equal v1 v2)
    (failure "Test equal: ~s ~s" v1 v2)))

(defun assert-true (v &optional msg)
  (unless v
    (failure "Test true: ~s [~A]" v (if msg msg ""))))

(defun assert-false (v &optional msg)
  (when v
    (failure "Test false ~A" (if msg msg ""))))