;-*- Mode:     Lisp -*-
;;;; Author:   Paul Dietz
;;;; Created:  Sat Sep  6 15:40:09 2003
;;;; Contains: Tests of ISQRT





;;; Error tests

(deftest isqrt.error.1
  (signals-error (isqrt) program-error)
  t)

(deftest isqrt.error.2
  (signals-error (isqrt 0 0) program-error)
  t)

(deftest isqrt.error.3
  (signals-error (isqrt 0 nil) program-error)
  t)

(deftest isqrt.error.4
  (signals-error (isqrt 0 0 0) program-error)
  t)

(deftest isqrt.error.5
  (loop for x in *mini-universe*
        unless (or (and (integerp x) (>= x 0))
                   (eval `(signals-type-error x ',x (isqrt x))))
        collect x)
  nil)

;;; Non-error tests

(deftest isqrt.1
  (loop for i from 0 to 10000
        for i2 = (* i i)
        for s = (isqrt i2)
        unless (eql s i)
        collect i)
  nil)

(deftest isqrt.2
  (loop for i = (random-from-interval most-positive-fixnum 0)
        for s = (isqrt i)
        repeat 1000
        unless (and (integerp s)
                    (>= s 0)
                    (<= (* s s) i)
                    (> (* (1+ s) (1+ s)) i))
        collect (list i s))
  nil)

(deftest isqrt.3
  (loop for i = (random-from-interval 1000000000000000 0)
        for s = (isqrt i)
        repeat 1000
        unless (and (integerp s)
                    (>= s 0)
                    (<= (* s s) i)
                    (> (* (1+ s) (1+ s)) i))
        collect (list i s))
  nil)