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    my ($module, @imports) = @_;

    # If the first import looks like a version, pass it as a bare string.
    my $version = q{};
    if (@imports >= 1 && $imports[0] =~ m{ \A \d+ (?: [.][\d_]+ )* \z }xms) {
        $version = shift(@imports);
    }

    # Get caller information to put imports in the correct package.
    my ($package) = caller;

    # Do the import with eval, and try to isolate it from the surrounding
    # context as much as possible.  Based heavily on Test::More::_eval.
    ## no critic (BuiltinFunctions::ProhibitStringyEval)
    ## no critic (ValuesAndExpressions::ProhibitImplicitNewlines)
    my ($result, $error, $sigdie);
    {
        local $@            = undef;
        local $!            = undef;
        local $SIG{__DIE__} = undef;
        $result = eval qq{
            package $package;
            use $module $version \@imports;
            1;
        };
        $error = $@;
        $sigdie = $SIG{__DIE__} || undef;
    }

    # If the use failed for any reason, skip the test.
    if (!$result || $error) {
        my $name = length($version) > 0 ? "$module $version" : $module;
        plan skip_all => "$name required for test";
    }

    # If the module set $SIG{__DIE__}, we cleared that via local.  Restore it.
    ## no critic (Variables::RequireLocalizedPunctuationVars)
    if (defined($sigdie)) {
        $SIG{__DIE__} = $sigdie;
    }
    return;
}

1;
__END__

=for stopwords
Allbery Allbery's DESC bareword sublicense MERCHANTABILITY NONINFRINGEMENT
rra-c-util

=head1 NAME

Test::RRA - Support functions for Perl tests

=head1 SYNOPSIS

    use Test::RRA
      qw(skip_unless_author skip_unless_automated use_prereq);

    # Skip this test unless author tests are requested.
    skip_unless_author('Coding style tests');

    # Skip this test unless doing automated or release testing.
    skip_unless_automated('POD syntax tests');

    # Load modules, skipping the test if they're not available.
    use_prereq('Perl6::Slurp', 'slurp');
    use_prereq('Test::Script::Run', '0.04');

=head1 DESCRIPTION

This module collects utility functions that are useful for Perl test
scripts.  It assumes Russ Allbery's Perl module layout and test
conventions and will only be useful for other people if they use the
same conventions.

=head1 FUNCTIONS

None of these functions are imported by default.  The ones used by a
script should be explicitly imported.

=over 4

=item skip_unless_author(DESC)

Checks whether AUTHOR_TESTING is set in the environment and skips the
whole test (by calling C<plan skip_all> from Test::More) if it is not.
DESC is a description of the tests being skipped.  A space and C<only run
for author> will be appended to it and used as the skip reason.

=item skip_unless_automated(DESC)

Checks whether AUTHOR_TESTING, AUTOMATED_TESTING, or RELEASE_TESTING are
set in the environment and skips the whole test (by calling C<plan
skip_all> from Test::More) if they are not.  This should be used by tests
that should not run during end-user installs of the module, but which
should run as part of CPAN smoke testing and release testing.

DESC is a description of the tests being skipped.  A space and C<normally
skipped> will be appended to it and used as the skip reason.

=item use_prereq(MODULE[, VERSION][, IMPORT ...])

Attempts to load MODULE with the given VERSION and import arguments.  If
this fails for any reason, the test will be skipped (by calling C<plan
skip_all> from Test::More) with a skip reason saying that MODULE is
required for the test.

VERSION will be passed to C<use> as a version bareword if it looks like a
version number.  The remaining IMPORT arguments will be passed as the
value of an array.

=back

=head1 AUTHOR

Russ Allbery <eagle@eyrie.org>

=head1 COPYRIGHT AND LICENSE

Copyright 2013, 2014 The Board of Trustees of the Leland Stanford Junior