Test::Script - Basic cross-platform tests for scripts

Author

       Original author: Adam Kennedy

       Current maintainer: Graham Ollis <plicease@cpan.org>

       Contributors:

       Brendan Byrd

       Chris White <cxw@cpan.org>

       John Karr (BRAINBUZ)

Caveats

       This module is fully supported back to Perl 5.8.1.

       The  STDIN  handle  will  be  closed when using script_runs with the stdin option.  An older version used
       IPC::Run3, which attempted to save STDIN, but apparently this cannot be done  consistently  or  portably.
       We now use Capture::Tiny instead and explicitly do not support saving STDIN handles.

Copyright And License

       This software is copyright (c) 2006-2021 by Adam Kennedy.

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

perl v5.36.0                                       2022-10-14                                  Test::Script(3pm)

Description

       The intent of this module is to provide a series of basic tests for 80% of the testing you will need to
       do for scripts in the script (or bin as is also commonly used) paths of your Perl distribution.

       It also provides similar functions for testing programs that are not Perl scripts.

       Further, it aims to provide this functionality with perfect platform-compatibility, and in a way that is
       as unobtrusive as possible.

       That is, if the program works on a platform, then Test::Script should always work on that platform as
       well. Anything less than 100% is considered unacceptable.

       In doing so, it is hoped that Test::Script can become a module that you can safely make a dependency of
       all your modules, without risking that your module won't on some platform because of the dependency.

       Where a clash exists between wanting more functionality and maintaining platform safety, this module will
       err on the side of platform safety.

Functions

script_compiles
[version 1.05]

script_compiles( $script, $test_name );

The "script_compiles" test calls the script with "perl -c script.pl", and checks that it returns without
error.

The path it should be passed is a relative Unix-format script name. This will be localised when running
"perl -c" and if the test fails the local name used will be shown in the diagnostic output.

Note also that the test will be run with the same perl interpreter that is running the test script (and
not with the default system perl). This will also be shown in the diagnostic output on failure.

script_runs
[version 1.05]

script_runs( $script, $test_name );
script_runs( \@script_and_arguments, $test_name );
script_runs( $script, \%options, $test_name );
script_runs( \@script_and_arguments, \%options, $test_name );

The "script_runs" test executes the script with "perl script.pl" and checks that it returns success.

The path it should be passed is a relative unix-format script name. This will be localised when running
"perl -c" and if the test fails the local name used will be shown in the diagnostic output.

The test will be run with the same perl interpreter that is running the test script (and not with the
default system perl). This will also be shown in the diagnostic output on failure.

[version 1.09]

You may pass in options as a hash as the second argument (as of version 1.09).

exit
The expected exit value. The default is to use whatever indicates success on your platform (usually
0).

interpreter_options
[version 1.25]

Array reference of Perl options to be passed to the interpreter. Things like "-w" or "-x" can be
passed this way. This may be either a single string or an array reference.

signal
The expected signal. The default is 0. Use with care! This may not be portable, and is known not
to work on Windows.

stdin
The input to be passed into the script via stdin. The value may be one of

simple scalar
Is considered to be a filename.

scalar reference
In which case the input will be drawn from the data contained in the referenced scalar.

The behavior for any other types is undefined (the current implementation uses Capture::Tiny). Any
already opened stdin will be closed.

stdout
Where to send the standard output to. If you use this option, then the the behavior of the
"script_stdout_" functions below are undefined. The value may be one of

simple scalar
Is considered to be a filename.

scalar reference

In which case the standard output will be places into the referenced scalar

The behavior for any other types is undefined (the current implementation uses Capture::Tiny).

stderr
Same as "stdout" above, except for stderr.

script_fails
[ version 1.28 ]

script_fails $script, { exit => $expected_exit }, $test_name );
script_fails $script, \%options, $test_name;

"script_runs" may be invoked as "script_fails". The exit option is mandatory when used this way. Since
Perl 5.12, "die" usually returns 255, but does not promise to do so. Fatal errors like divide by 0 also
return 255 often so it is not the best error code for a trapped exception. script_runs needs an exit
code it considers success, use "warn; exit;" instead of die.

script_stdout_is
[version 1.09]

script_stdout_is $expected_stdout, $test_name;

Tests if the output to stdout from the previous "script_runs" matches the expected value exactly.

script_stdout_isnt
[version 1.09]

script_stdout_is $expected_stdout, $test_name;

Tests if the output to stdout from the previous "script_runs" does NOT match the expected value exactly.

script_stdout_like
[version 1.09]

script_stdout_like $regex, $test_name;

Tests if the output to stdout from the previous "script_runs" matches the regular expression.

script_stdout_unlike
[version 1.09]

script_stdout_unlike $regex, $test_name;

Tests if the output to stdout from the previous "script_runs" does NOT match the regular expression.

script_stderr_is
[version 1.09]

script_stderr_is $expected_stderr, $test_name;

Tests if the output to stderr from the previous "script_runs" matches the expected value exactly.

script_stderr_isnt
[version 1.09]

script_stderr_is $expected_stderr, $test_name;

Tests if the output to stderr from the previous "script_runs" does NOT match the expected value exactly.

script_stderr_like
[version 1.09]

script_stderr_like $regex, $test_name;

Tests if the output to stderr from the previous "script_runs" matches the regular expression.

script_stderr_unlike
[version 1.09]

script_stderr_unlike $regex, $test_name;

Tests if the output to stderr from the previous "script_runs" does NOT match the regular expression.

program_runs
[version 1.26]

program_runs( $program, $test_name );
program_runs( \@program_and_arguments, $test_name );
program_runs( $program, \%options, $test_name );
program_runs( \@program_and_arguments, \%options, $test_name );

The "program_runs" test executes the given program and checks that it returns success. This function
works like "script_runs" except:

• The path $program or @program_and_arguments is passed as-is to system()
<https://perldoc.perl.org/functions/system.html>. This means "program_runs" can test any program,
not just Perl scripts.

• The %options do not support the "interpreter_options" key.

See File::Spec or Path::Class for routines useful in building pathnames in a cross-platform way.

program_fails
[ version 1.28 ]

program_fails $program, { exit => $expected_exit }, $test_name;
program_fails $program, \%options, $test_name;

"program_runs" may be invoked as "program_fails". "program_fails" needs to know the expected exit value,
so exit becomes a required option.

program_stdout_is
[version 1.26]

program_stdout_is $expected_stdout, $test_name;

Tests if the output to stdout from the previous "program_runs" matches the expected value exactly.

program_stdout_isnt
[version 1.26]

program_stdout_is $expected_stdout, $test_name;

Tests if the output to stdout from the previous "program_runs" does NOT match the expected value exactly.

program_stdout_like
[version 1.26]

program_stdout_like $regex, $test_name;

Tests if the output to stdout from the previous "program_runs" matches the regular expression.

program_stdout_unlike
[version 1.26]

program_stdout_unlike $regex, $test_name;

Tests if the output to stdout from the previous "program_runs" does NOT match the regular expression.

program_stderr_is
[version 1.26]

program_stderr_is $expected_stderr, $test_name;

Tests if the output to stderr from the previous "program_runs" matches the expected value exactly.

program_stderr_isnt
[version 1.26]

program_stderr_is $expected_stderr, $test_name;

Tests if the output to stderr from the previous "program_runs" does NOT match the expected value exactly.

program_stderr_like
[version 1.26]

program_stderr_like $regex, $test_name;

Tests if the output to stderr from the previous "program_runs" matches the regular expression.

program_stderr_unlike
[version 1.26]

program_stderr_unlike $regex, $test_name;

Tests if the output to stderr from the previous "program_runs" does NOT match the regular expression.

Name

       Test::Script - Basic cross-platform tests for scripts

Synopsis

        use Test2::V0;
        use Test::Script;

        script_compiles('script/myscript.pl');
        script_runs(['script/myscript.pl', '--my-argument']);

        program_runs(['ls', '/dev']);

        done_testing;