Move Math::BigRat from ext/ to cpan/

[perl5.git] / cpan / Math-BigRat / t / bigroot.t

diff --git a/cpan/Math-BigRat/t/bigroot.t b/cpan/Math-BigRat/t/bigroot.t
new file mode 100644 (file)
index 0000000..5b147e1
--- /dev/null
+++ b/cpan/Math-BigRat/t/bigroot.t
@@ -0,0 +1,68 @@
+#!/usr/bin/perl -w
+
+# Test broot function (and bsqrt() function, since it is used by broot()).
+
+# It is too slow to be simple included in bigfltpm.inc, where it would get
+# executed 3 times.
+
+# But it is better to test the numerical functionality, instead of not testing
+# it at all.
+
+use Test::More;
+use strict;
+
+BEGIN
+  {
+  $| = 1;
+  # to locate the testing files
+  my $location = $0; $location =~ s/bigroot.t//i;
+  if ($ENV{PERL_CORE})
+    {
+    # testing with the core distribution
+    @INC = qw(../lib);
+    }
+  unshift @INC, '../lib';
+  if (-d 't')
+    {
+    chdir 't';
+    require File::Spec;
+    unshift @INC, File::Spec->catdir(File::Spec->updir, $location);
+    }
+  else
+    {
+    unshift @INC, $location;
+    }
+  print "# INC = @INC\n";
+
+  plan tests => 8 * 2;
+  }
+
+use Math::BigFloat;
+use Math::BigInt;
+
+my $cl = "Math::BigFloat";
+my $c = "Math::BigInt";
+
+# 2 ** 240 = 
+# 1766847064778384329583297500742918515827483896875618958121606201292619776
+
+test_broot ('2','240', 8, undef,   '1073741824');
+test_broot ('2','240', 9, undef,   '106528681.3099908308759836475139583940127');
+test_broot ('2','120', 9, undef,   '10321.27324073880096577298929482324664787');
+test_broot ('2','120', 17, undef,   '133.3268493632747279600707813049418888729');
+
+test_broot ('2','120', 8, undef,   '32768');
+test_broot ('2','60', 8, undef,   '181.0193359837561662466161566988413540569');
+test_broot ('2','60', 9, undef,   '101.5936673259647663841091609134277286651');
+test_broot ('2','60', 17, undef,   '11.54672461623965153271017217302844672562');
+
+sub test_broot
+  {
+  my ($x,$n,$y,$scale,$result) = @_;
+
+  my $s = $scale || 'undef';
+  is ($cl->new($x)->bpow($n)->broot($y,$scale),$result, "Try: $cl $x->bpow($n)->broot($y,$s) == $result");
+  $result =~ s/\..*//;
+  is ($c->new($x)->bpow($n)->broot($y,$scale),$result, "Try: $c $x->bpow($n)->broot($y,$s) == $result");
+  }
+