perldoc > Test::Harness

man perldoc info pydoc3 ri search

📛 NAME

Test::Harness - Run Perl standard test scripts with statistics

🚀 Quick Reference

Use Case	Command	Description
Run tests simply	use Test::Harness; runtests(@test_files);	Execute test files and print a summary report
Capture detailed results	my ($total, $failed) = execute_tests(tests => \@test_files);	Get hash refs of test summaries and failures
Enable verbose output	$Test::Harness::verbose = 1;	Show verbose test results
Add taint mode	HARNESS_PERL_SWITCHES=-T	Turn on taint mode for all test files
Run parallel tests	HARNESS_OPTIONS=j9	Run up to 9 jobs in parallel
Time each test	HARNESS_TIMER=1	Display milliseconds taken per test

📌 VERSION

Version 3.43

📖 SYNOPSIS

use Test::Harness;

runtests(@test_files);

📝 DESCRIPTION

Although, for historical reasons, the Test::Harness distribution takes its name from this module it now exists only to provide TAP::Harness with an interface that is somewhat backwards compatible with Test::Harness 2.xx. If you're writing new code consider using TAP::Harness directly instead.

Emulation is provided for "runtests" and "execute_tests" but the pluggable 'Straps' interface that previous versions of Test::Harness supported is not reproduced here. Straps is now available as a stand alone module: Test::Harness::Straps.

See TAP::Parser, TAP::Harness for the main documentation for this distribution.

🛠️ FUNCTIONS

The following functions are available.

🏃 runtests( @test_files )

This runs all the given @test_files and divines whether they passed or failed based on their output to STDOUT (details above). It prints out each individual test which failed along with a summary report and a how long it all took.

It returns true if everything was ok. Otherwise it will die() with one of the messages in the DIAGNOSTICS section.

🔧 execute_tests( tests => \@test_files, out => \*FH )

Runs all the given @test_files (just like runtests()) but doesn't generate the final report. During testing, progress information will be written to the currently selected output filehandle (usually STDOUT), or to the filehandle given by the out parameter. The out is optional.

Returns a list of two values, $total and $failed, describing the results. $total is a hash ref summary of all the tests run. Its keys and values are this:

bonus           Number of individual todo tests unexpectedly passed
max             Number of individual tests ran
ok              Number of individual tests passed
sub_skipped     Number of individual tests skipped
todo            Number of individual todo tests

files           Number of test files ran
good            Number of test files passed
bad             Number of test files failed
tests           Number of test files originally given
skipped         Number of test files skipped

If $total->{bad} == 0 and $total->{max} > 0, you've got a successful test.

$failed is a hash ref of all the test scripts that failed. Each key is the name of a test script, each value is another hash representing how that script failed. Its keys are these:

name        Name of the test which failed
estat       Script's exit value
wstat       Script's wait status
max         Number of individual tests
failed      Number which failed
canon       List of tests which failed (as string).

$failed should be empty if everything passed.

📤 EXPORT

&runtests is exported by Test::Harness by default.

&execute_tests, $verbose, $switches and $debug are exported upon request.

🌍 Environment Variables Set by TAP::Harness::Compatible

Test::Harness sets these before executing the individual tests.

HARNESS_ACTIVE This is set to a true value. It allows the tests to determine if they are being executed through the harness or by any other means. HARNESS_VERSION This is the version of Test::Harness.

🌍 Environment Variables Affecting Test::Harness

HARNESS_PERL_SWITCHES Setting this adds perl command line switches to each test file run.
For example, HARNESS_PERL_SWITCHES=-T will turn on taint mode. HARNESS_PERL_SWITCHES=-MDevel::Cover will run Devel::Cover for each test.
-w is always set. You can turn this off in the test with BEGIN { $^W = 0 }. HARNESS_TIMER Setting this to true will make the harness display the number of milliseconds each test took. You can also use prove's --timer switch. HARNESS_VERBOSE If true, Test::Harness will output the verbose results of running its tests. Setting $Test::Harness::verbose will override this, or you can use the -v switch in the prove utility. HARNESS_OPTIONS Provide additional options to the harness. Currently supported options are:

• j<n> – Run <n> (default 9) parallel jobs.
• c – Try to color output. See TAP::Formatter::Base.
• a<file.tgz> – Will use TAP::Harness::Archive as the harness class, and save the TAP to file.tgz.
• fPackage-With-Dashes – Set the formatter_class of the harness being run. Since the HARNESS_OPTIONS is separated by :, we use - instead.

Multiple options may be separated by colons: HARNESS_OPTIONS=j9:c make test. HARNESS_SUBCLASS Specifies a TAP::Harness subclass to be used in place of TAP::Harness. HARNESS_SUMMARY_COLOR_SUCCESS Determines the Term::ANSIColor for the summary in case it is successful. This color defaults to green. HARNESS_SUMMARY_COLOR_FAIL Determines the Term::ANSIColor for the failure in case it is successful. This color defaults to red.

🔥 Taint Mode

Normally when a Perl program is run in taint mode the contents of the PERL5LIB environment variable do not appear in @INC.

Because PERL5LIB is often used during testing to add build directories to @INC Test::Harness passes the names of any directories found in PERL5LIB as -I switches. The net effect of this is that PERL5LIB is honoured even in taint mode.

📚 SEE ALSO

TAP::Harness

🐛 BUGS

Please report any bugs or feature requests to bug-test-harness at rt.cpan.org, or through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Harness>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

👥 AUTHORS

Andy Armstrong <andy AT hexten.net>

Test::Harness 2.64 (maintained by Andy Lester and on which this module is based) has this attribution:

Either Tim Bunce or Andreas Koenig, we don't know. What we know for sure is, that it was inspired by Larry Wall's F<TEST> script that came with perl distributions for ages. Numerous anonymous contributors exist. Andreas Koenig held the torch for many years, and then Michael G Schwern.

⚖️ LICENCE AND COPYRIGHT

Copyright (c) 2007-2011, Andy Armstrong <andy AT hexten.net>. 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.

📛 NAME 🚀 Quick Reference 📌 VERSION 📖 SYNOPSIS 📝 DESCRIPTION 🛠️ FUNCTIONS 📤 EXPORT 🔥 Taint Mode 📚 SEE ALSO 🐛 BUGS 👥 AUTHORS ⚖️ LICENCE AND COPYRIGHT