Test::Harness(3perl) Perl Programmers Reference Guide Test::Harness(3perl)
NAME
Test::Harness - Run Perl standard test scripts with statistics
VERSION
Version 3.48
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 THAT TAP::HARNESS::COMPATIBLE SETS
"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 THAT AFFECT 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 "new" in 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@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@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.
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