Test::LimitDecimalPlaces - Compare numerical values by limiting number of decimal places
This document describes Test::LimitDecimalPlaces version 0.01
use Test::LimitDecimalPlaces tests => 5; # Can specify the test plan. # Equality test by default number of decimal places limit_ok(1.2345678, 1.2345678, 'Test the same floating-point values.'); # Inequality test by default number of decimal places limit_not_ok( 0.0000001, 0.0000002, 'Test different values' ); # Equality test by specified number of decimal places limit_ok_by(0.00000001, 0.000000006, 8, 'Test similar value.') ."\n"; # number of decimal places is 8 # Inequality test by specified number of decimal places limit_not_ok_by( 0.00000001, 0.00000002, 8, 'Test different values.' ); # number of decimal places is 8 # Compare arrays my @x = ( 0, 1, 0.1, 0.0000001, 0.0000001 ); my @y = ( 0, 1, 0.1, 0.0000001, 0.00000006 ); limit_ok(\@x, \@y, 'Compare arrays.'); # Set a different default number of decimal places use Test::LimitDecimalPlaces num_of_digits => 6, tests => 1; limit_ok(1.234567, 1.234566, 'Test the similar floating-point values.');
If compare floating point numbers normally, we cannot get the correct result on some environment. This module was made to solve this problem.
This module provides test functions that can compare numerical values by limiting number of decimal places. These functions are using splintf() internally to limit number of decimal places.
Use with no args, then number of decimal places to limit defaults 7.
Use with argument of 'num_of_digits', then default number of decimal places to limit is set specified number.
This parameter must be a number greater than or equal to zero.
This module can specify test plan. Like so:
use Test::LimitDecimalPlaces tests => 1;
And this module can specify own options with test plan. Like so:
use Test::LimitDecimalPlaces num_of_digits => 6, tests => 1;
Test::LimitDecimalPlaces-specific option must come first.
limit_ok($x, $y, 'Description of test');
limit_ok(\@x, \@y, 'Description of test');
This function compares and check equality between given values by limiting default number of decimal places.
limit_ok_by($x, $y, $num_of_digits, 'Description of test');
limit_ok_by(\@x, \@y, $num_of_digits, 'Description of test');
Action of this function is almost the same as limit_ok().
But this function uses specified number of decimal places ($num_of_digits in case of the above instance).
limit_not_ok($x, $y, 'Description of test');
limit_not_ok(\@x, \@y, 'Description of test');
This function compares and check inequality between given values by limiting default number of decimal places.
limit_not_ok_by($x, $y, $num_of_digits, 'Description of test');
limit_not_ok_by(\@x, \@y, $num_of_digits, 'Description of test');
Action of this function is almost the same as limit_not_ok().
Test::LimitDecimalPlaces requires no configuration files or environment variables.
Test::Exception (version 0.31 or later)
None reported.
No bugs have been reported.
Please report any bugs or feature requests to bug-test-limitdecimalplaces@rt.cpan.org, or through the web interface at http://rt.cpan.org.
bug-test-limitdecimalplaces@rt.cpan.org
moznion <moznion@gmail.com>
<moznion@gmail.com>
Copyright (c) 2012, moznion <moznion@gmail.com>. All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.
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To install Test::LimitDecimalPlaces, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Test::LimitDecimalPlaces
CPAN shell
perl -MCPAN -e shell install Test::LimitDecimalPlaces
For more information on module installation, please visit the detailed CPAN module installation guide.