clear-input.lsp

;-*- Mode:     Lisp -*-
;;;; Author:   Paul Dietz
;;;; Created:  Wed Jan 28 06:12:39 2004
;;;; Contains: Tests of CLEAR-INPUT

(in-package :cl-test)

;;; These tests are limited, since whether an input stream can be
;;; cleared is not well specified.

(deftest clear-input.1
  (loop for s in (list *debug-io* *query-io*
                       *standard-input* *terminal-io*)
        always (eq (clear-input s) nil))
  t)

(deftest clear-input.2
  (clear-input)
  nil)

(deftest clear-input.3
  (clear-input nil)
  nil)

(deftest clear-input.4
  (clear-input t)
  nil)

(deftest clear-input.5
  (with-input-from-string
   (is "!?*")
   (let ((*terminal-io* (make-two-way-stream is (make-broadcast-stream))))
     (clear-input t)))
  nil)

(deftest clear-input.6
  (with-input-from-string
   (*standard-input* "345")
   (clear-input nil))
  nil)

;;; Error cases

(deftest clear-input.error.1
  :notes (:assume-no-simple-streams)
  (signals-error (clear-input t nil) program-error)
  t)

(deftest clear-input.error.2
  :notes (:assume-no-simple-streams)
  (signals-error (clear-input nil nil) program-error)
  t)

(deftest clear-input.error.3
  (signals-error (clear-input t nil nil) program-error)
  t)

(deftest clear-input.error.4
  (signals-error (clear-input nil nil nil) program-error)
  t)

(deftest clear-input.error.5
  (check-type-error #'clear-input #'(lambda (x) (typep x '(or stream (member nil t)))))
  nil)