Test::Tolerant - test routines for testing numbers against tolerances


version 1.710


  use Test::More;
  use Test::Tolerant;

  my $total = rand(6) + rand(6) + rand(6);
  is_tol(10, [ qw( 3 to 18 ) ], "got an acceptable result from random dice");



This library should run on perls released even a long time ago. It should work on any version of perl released in the last five years.

Although it may work on older versions of perl, no guarantee is made that the minimum required version will not be increased. The version may be increased for any reason, and there is no promise that patches will be accepted to lower the minimum required perl.



  is_tol($have, $want_spec, $comment);

is_tol is the only routine provided by Test::Tolerant, and is exported by default. It beahves like is from Test::More, asserting that two values must be equal, but it will always use numeric equality, and the second argument is not always used as the right hand side of comparison directly, but it used to produce a Number::Tolerant to compare to.

$have_spec can be:

  * a Number::Tolerant object
  * an arrayref of args to Number::Tolerant->new
  * a string to be passed to Number::Tolerant->from_string
    * a literal number falls under this group

If the value is outside of spec, you'll get a diagnostic message something like this:

  given value is outside acceptable tolerances
      have: 3
      want: 5 < x


Ricardo Signes <>


This software is copyright (c) 2004 by Ricardo Signes.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.