1#!/usr/bin/perl -w
2
3# Test broot function (and bsqrt() function, since it is used by broot()).
4
5# It is too slow to be simple included in bigfltpm.inc, where it would get
6# executed 3 times.
7
8# But it is better to test the numerical functionality, instead of not testing
9# it at all.
10
11use Test;
12use strict;
13
14BEGIN
15  {
16  $| = 1;
17  # to locate the testing files
18  my $location = $0; $location =~ s/bigroot.t//i;
19  if ($ENV{PERL_CORE})
20    {
21    # testing with the core distribution
22    @INC = qw(../lib);
23    }
24  unshift @INC, '../lib';
25  if (-d 't')
26    {
27    chdir 't';
28    require File::Spec;
29    unshift @INC, File::Spec->catdir(File::Spec->updir, $location);
30    }
31  else
32    {
33    unshift @INC, $location;
34    }
35  print "# INC = @INC\n";
36
37  plan tests => 4 * 2;
38  }
39
40use Math::BigFloat;
41use Math::BigInt;
42
43my $cl = "Math::BigFloat";
44my $c = "Math::BigInt";
45
46# 2 ** 240 = 
47# 1766847064778384329583297500742918515827483896875618958121606201292619776
48
49# takes way too long
50#test_broot ('2','240', 8, undef,   '1073741824');
51#test_broot ('2','240', 9, undef,   '106528681.3099908308759836475139583940127');
52#test_broot ('2','120', 9, undef,   '10321.27324073880096577298929482324664787');
53#test_broot ('2','120', 17, undef,   '133.3268493632747279600707813049418888729');
54
55test_broot ('2','120', 8, undef,   '32768');
56test_broot ('2','60', 8, undef,   '181.0193359837561662466161566988413540569');
57test_broot ('2','60', 9, undef,   '101.5936673259647663841091609134277286651');
58test_broot ('2','60', 17, undef,   '11.54672461623965153271017217302844672562');
59
60sub test_broot
61  {
62  my ($x,$n,$y,$scale,$result) = @_;
63
64  my $s = $scale || 'undef';
65  print "# Try: $cl $x->bpow($n)->broot($y,$s) == $result:\n"; 
66   ok ($cl->new($x)->bpow($n)->broot($y,$scale),$result);
67  $result =~ s/\..*//;
68  print "# Try: $c $x->bpow($n)->broot($y,$s) == $result:\n"; 
69   ok ($c->new($x)->bpow($n)->broot($y,$scale),$result);
70  }
71
72