builder.pm

SinFP是一种新的识别对方计算机操作系统类型的工具

    unless( $Have_Plan ) {
        die "You tried to run tests without a plan!  Gotta have a plan.\n";
    }

    $Curr_Test++;

    $Test_Results[$Curr_Test-1] = 1;

    my $out = "not ok";
    $out   .= " $Curr_Test" if $self->use_numbers;
    $out   .= " # TODO $why\n";

    $Test->_print($out);

    return 1;
}


=begin _unimplemented

=item B<skip_rest>

  $Test->skip_rest;
  $Test->skip_rest($reason);

Like skip(), only it skips all the rest of the tests you plan to run
and terminates the test.

If you're running under no_plan, it skips once and terminates the
test.

=end _unimplemented

=back


=head2 Test style

=over 4

=item B<level>

    $Test->level($how_high);

How far up the call stack should $Test look when reporting where the
test failed.

Defaults to 1.

Setting $Test::Builder::Level overrides.  This is typically useful
localized:

    {
        local $Test::Builder::Level = 2;
        $Test->ok($test);
    }

=cut

sub level {
    my($self, $level) = @_;

    if( defined $level ) {
        $Level = $level;
    }
    return $Level;
}

$CLASS->level(1);


=item B<use_numbers>

    $Test->use_numbers($on_or_off);

Whether or not the test should output numbers.  That is, this if true:

  ok 1
  ok 2
  ok 3

or this if false

  ok
  ok
  ok

Most useful when you can't depend on the test output order, such as
when threads or forking is involved.

Test::Harness will accept either, but avoid mixing the two styles.

Defaults to on.

=cut

my $Use_Nums = 1;
sub use_numbers {
    my($self, $use_nums) = @_;

    if( defined $use_nums ) {
        $Use_Nums = $use_nums;
    }
    return $Use_Nums;
}

=item B<no_header>

    $Test->no_header($no_header);

If set to true, no "1..N" header will be printed.

=item B<no_ending>

    $Test->no_ending($no_ending);

Normally, Test::Builder does some extra diagnostics when the test
ends.  It also changes the exit code as described in Test::Simple.

If this is true, none of that will be done.

=cut

my($No_Header, $No_Ending) = (0,0);
sub no_header {
    my($self, $no_header) = @_;

    if( defined $no_header ) {
        $No_Header = $no_header;
    }
    return $No_Header;
}

sub no_ending {
    my($self, $no_ending) = @_;

    if( defined $no_ending ) {
        $No_Ending = $no_ending;
    }
    return $No_Ending;
}


=back

=head2 Output

Controlling where the test output goes.

It's ok for your test to change where STDOUT and STDERR point to,
Test::Builder's default output settings will not be affected.

=over 4

=item B<diag>

    $Test->diag(@msgs);

Prints out the given $message.  Normally, it uses the failure_output()
handle, but if this is for a TODO test, the todo_output() handle is
used.

Output will be indented and marked with a # so as not to interfere
with test output.  A newline will be put on the end if there isn't one
already.

We encourage using this rather than calling print directly.

=cut

sub diag {
    my($self, @msgs) = @_;
    return unless @msgs;

    # Prevent printing headers when compiling (i.e. -c)
    return if $^C;

    # Escape each line with a #.
    foreach (@msgs) {
        s/^/# /gms;
    }

    push @msgs, "\n" unless $msgs[-1] =~ /\n\Z/;

    local $Level = $Level + 1;
    my $fh = $self->todo ? $self->todo_output : $self->failure_output;
    local($\, $", $,) = (undef, ' ', '');
    print $fh @msgs;
}

=begin _private

=item B<_print>

    $Test->_print(@msgs);

Prints to the output() filehandle.

=end _private

=cut

sub _print {
    my($self, @msgs) = @_;

    # Prevent printing headers when only compiling.  Mostly for when
    # tests are deparsed with B::Deparse
    return if $^C;

    local($\, $", $,) = (undef, ' ', '');
    my $fh = $self->output;
    print $fh @msgs;
}


=item B<output>

    $Test->output($fh);
    $Test->output($file);

Where normal "ok/not ok" test output should go.

Defaults to STDOUT.

=item B<failure_output>

    $Test->failure_output($fh);
    $Test->failure_output($file);

Where diagnostic output on test failures and diag() should go.

Defaults to STDERR.

=item B<todo_output>

    $Test->todo_output($fh);
    $Test->todo_output($file);

Where diagnostics about todo test failures and diag() should go.

Defaults to STDOUT.

=cut

my($Out_FH, $Fail_FH, $Todo_FH);
sub output {
    my($self, $fh) = @_;

    if( defined $fh ) {
        $Out_FH = _new_fh($fh);
    }
    return $Out_FH;
}

sub failure_output {
    my($self, $fh) = @_;

    if( defined $fh ) {
        $Fail_FH = _new_fh($fh);
    }
    return $Fail_FH;
}

sub todo_output {
    my($self, $fh) = @_;

    if( defined $fh ) {
        $Todo_FH = _new_fh($fh);
    }
    return $Todo_FH;
}

sub _new_fh {
    my($file_or_fh) = shift;

    my $fh;
    unless( UNIVERSAL::isa($file_or_fh, 'GLOB') ) {
        $fh = do { local *FH };
        open $fh, ">$file_or_fh" or 
            die "Can't open test output log $file_or_fh: $!";
    }
    else {
        $fh = $file_or_fh;
    }

    return $fh;
}

unless( $^C ) {
    # We dup STDOUT and STDERR so people can change them in their
    # test suites while still getting normal test output.
    open(TESTOUT, ">&STDOUT") or die "Can't dup STDOUT:  $!";
    open(TESTERR, ">&STDERR") or die "Can't dup STDERR:  $!";

    # Set everything to unbuffered else plain prints to STDOUT will
    # come out in the wrong order from our own prints.
    _autoflush(\*TESTOUT);
    _autoflush(\*STDOUT);
    _autoflush(\*TESTERR);
    _autoflush(\*STDERR);

    $CLASS->output(\*TESTOUT);
    $CLASS->failure_output(\*TESTERR);
    $CLASS->todo_output(\*TESTOUT);
}

sub _autoflush {
    my($fh) = shift;
    my $old_fh = select $fh;
    $| = 1;
    select $old_fh;
}


=back


=head2 Test Status and Info

=over 4

=item B<current_test>

    my $curr_test = $Test->current_test;
    $Test->current_test($num);

Gets/sets the current test # we're on.

You usually shouldn't have to set this.

=cut

sub current_test {
    my($self, $num) = @_;

    if( defined $num ) {
        $Curr_Test = $num;
        if( $num > @Test_Results ) {
            for ($#Test_Results..$num-1) {
                $Test_Results[$_] = 1;
            }
        }
    }
    return $Curr_Test;
}


=item B<summary>

    my @tests = $Test->summary;

A simple summary of the tests so far.  True for pass, false for fail.
This is a logical pass/fail, so todos are passes.

Of course, test #1 is $tests[0], etc...

=cut

sub summary {
    my($self) = shift;

    return @Test_Results;
}

=item B<details>  I<UNIMPLEMENTED>

    my @tests = $Test->details;

Like summary(), but with a lot more detail.

    $tests[$test_num - 1] = 
            { ok         => is the test considered ok?
              actual_ok  => did it literally say 'ok'?
              name       => name of the test (if any)
              type       => 'skip' or 'todo' (if any)
              reason     => reason for the above (if any)
            };

=item B<todo>

    my $todo_reason = $Test->todo;
    my $todo_reason = $Test->todo($pack);

todo() looks for a $TODO variable in your tests.  If set, all tests
will be considered 'todo' (see Test::More and Test::Harness for
details).  Returns the reason (ie. the value of $TODO) if running as
todo tests, false otherwise.

todo() is pretty part about finding the right package to look for
$TODO in.  It uses the exported_to() package to find it.  If that's
not set, it's pretty good at guessing the right package to look at.

Sometimes there is some confusion about where todo() should be looking
for the $TODO variable.  If you want to be sure, tell it explicitly
what $pack to use.

=cut

sub todo {
    my($self, $pack) = @_;

    $pack = $pack || $self->exported_to || $self->caller(1);

    no strict 'refs';
    return defined ${$pack.'::TODO'} ? ${$pack.'::TODO'}
                                     : 0;
}

=item B<caller>

    my $package = $Test->caller;
    my($pack, $file, $line) = $Test->caller;
    my($pack, $file, $line) = $Test->caller($height);

Like the normal caller(), except it reports according to your level().

=cut

sub caller {
    my($self, $height) = @_;
    $height ||= 0;
    
    my @caller = CORE::caller($self->level + $height + 1);
    return wantarray ? @caller : $caller[0];
}

=back

=cut

=begin _private

=over 4

=item B<_sanity_check>

  _sanity_check();

Runs a bunch of end of test sanity checks to make sure reality came
through ok.  If anything is wrong it will die with a fairly friendly
error message.

=cut

#'#
sub _sanity_check {
    _whoa($Curr_Test < 0,  'Says here you ran a negative number of tests!');
    _whoa(!$Have_Plan and $Curr_Test, 
          'Somehow your tests ran without a plan!');
    _whoa($Curr_Test != @Test_Results,
          'Somehow you got a different number of results than tests ran!');
}

=item B<_whoa>

  _whoa($check, $description);

A sanity check, similar to assert().  If the $check is true, something
has gone horribly wrong.  It will die with the given $description and
a note to contact the author.

=cut

sub _whoa {
    my($check, $desc) = @_;
    if( $check ) {
        die <<WHOA;
WHOA!  $desc
This should never happen!  Please contact the author immediately!
WHOA
    }
}

=item B<_my_exit>

  _my_exit($exit_num);

Perl seems to have some trouble with exiting inside an END block.  5.005_03
and 5.6.1 both seem to do odd things.  Instead, this function edits $?
directly.  It should ONLY be called from inside an END block.  It
doesn't actually exit, that's your job.

=cut

sub _my_exit {
    $? = $_[0];

    return 1;
}


=back

=end _private

=cut

$SIG{__DIE__} = sub {
    # We don't want to muck with death in an eval, but $^S isn't
    # totally reliable.  5.005_03 and 5.6.1 both do the wrong thing
    # with it.  Instead, we use caller.  This also means it runs under
    # 5.004!
    my $in_eval = 0;
    for( my $stack = 1;  my $sub = (CORE::caller($stack))[3];  $stack++ ) {
        $in_eval = 1 if $sub =~ /^\(eval\)/;
    }
    $Test_Died = 1 unless $in_eval;
};

sub _ending {
    my $self = shift;

    _sanity_check();

    # Bailout if plan() was never called.  This is so
    # "require Test::Simple" doesn't puke.
    do{ _my_exit(0) && return } if !$Have_Plan;

    # Figure out if we passed or failed and print helpful messages.
    if( @Test_Results ) {
        # The plan?  We have no plan.
        if( $No_Plan ) {
            $self->_print("1..$Curr_Test\n") unless $self->no_header;
            $Expected_Tests = $Curr_Test;
        }

        my $num_failed = grep !$_, @Test_Results[0..$Expected_Tests-1];
        $num_failed += abs($Expected_Tests - @Test_Results);

        if( $Curr_Test < $Expected_Tests ) {
            $self->diag(<<"FAIL");
Looks like you planned $Expected_Tests tests but only ran $Curr_Test.
FAIL
        }
        elsif( $Curr_Test > $Expected_Tests ) {
            my $num_extra = $Curr_Test - $Expected_Tests;
            $self->diag(<<"FAIL");
Looks like you planned $Expected_Tests tests but ran $num_extra extra.
FAIL
        }
        elsif ( $num_failed ) {
            $self->diag(<<"FAIL");
Looks like you failed $num_failed tests of $Expected_Tests.
FAIL
        }

        if( $Test_Died ) {
            $self->diag(<<"FAIL");
Looks like your test died just after $Curr_Test.
FAIL

            _my_exit( 255 ) && return;
        }

        _my_exit( $num_failed <= 254 ? $num_failed : 254  ) && return;
    }
    elsif ( $Skip_All ) {
        _my_exit( 0 ) && return;
    }
    else {
        $self->diag("No tests run!\n");
        _my_exit( 255 ) && return;
    }
}

END {
    $Test->_ending if defined $Test and !$Test->no_ending;
}

=head1 EXAMPLES

At this point, Test::Simple and Test::More are your best examples.

=head1 SEE ALSO

Test::Simple, Test::More, Test::Harness

=head1 AUTHORS

Original code by chromatic, maintained by Michael G Schwern
E<lt>[e-mail]<gt>

=head1 COPYRIGHT

Copyright 2001 by chromatic E<lt>[e-mail]<gt>,
                  Michael G Schwern E<lt>[e-mail]<gt>.

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

See F<http://www.perl.com/perl/misc/Artistic.html>

=cut

1;