# Checking the basics.                    -*- Autotest -*-

# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
#
# This file is part of GNU libmatheval
#
# GNU libmatheval is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2, or (at
# your option) any later version.
#
# GNU libmatheval is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with program; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

AT_BANNER([[Checking basic functionality.]])

AT_SETUP([Check basics.])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "x+2"))
(display (evaluator-get-string f))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [(x+2)], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "x^3-4*y+4"))
(display (evaluator-evaluate f 1 '("x") '(1)))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [5.0], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "x+2"))
(define f_prim (evaluator-derivative f "x"))
(display (evaluator-get-string f_prim))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [1], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "sin(pi_2)"))
(display (evaluator-evaluate-x f 0))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [1.0], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "exp(ln10)"))
(display (evaluator-evaluate-x f 0))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [10.0], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "sin(x)*x^3"))
(display (evaluator-evaluate-x f 0.7))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [0.220966666722528], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "y/3+log(x)"))
(display (evaluator-evaluate-x-y f 0.4 -0.7))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [-1.14962406520749], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "x*sin(y)+0.6*tan(z)"))
(display (evaluator-evaluate-x-y-z f 11.2 0.41 -0.66))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [3.99876152571934], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "tan(x)/cos(x)"))
(define f_prim (evaluator-derivative-x f))
(display (evaluator-get-string f_prim))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [((((1/(cos(x)^2))*cos(x))-(tan(x)*(-sin(x))))/(cos(x)^2))], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "x+0.7*log(y)"))
(define f_prim (evaluator-derivative-y f))
(display (evaluator-get-string f_prim))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [((0*log(y))+(0.7*(1/y)))], [ignore])

AT_DATA([basics.scm],
[[
(define f (evaluator-create "x*z+y^3/z^2"))
(define f_prim (evaluator-derivative-z f))
(display (evaluator-get-string f_prim))
]])

AT_CHECK([matheval.sh basics.scm], [ignore], [(((0*z)+x)+((((0*(y^2))*(z^2))-((y^3)*(2*z)))/((z^2)^2)))], [ignore])

AT_CLEANUP