harness.pm

SinFP是一种新的识别对方计算机操作系统类型的工具

# -*- Mode: cperl; cperl-indent-level: 4 -*-

package Test::Harness;

require 5.00405;
use Test::Harness::Straps;
use Test::Harness::Assert;
use Exporter;
use Benchmark;
use Config;
use strict;


use vars qw(
    $VERSION 
    @ISA @EXPORT @EXPORT_OK 
    $Verbose $Switches $Debug
    $verbose $switches $debug
    $Curtest
    $Columns 
    $Timer
    $ML $Last_ML_Print
    $Strap
    $has_time_hires
);

BEGIN {
    eval "use Time::HiRes 'time'";
    $has_time_hires = !$@;
}

=head1 NAME

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

=head1 VERSION

Version 2.56

=cut

$VERSION = "2.56";

# Backwards compatibility for exportable variable names.
*verbose  = *Verbose;
*switches = *Switches;
*debug    = *Debug;

$ENV{HARNESS_ACTIVE} = 1;
$ENV{HARNESS_VERSION} = $VERSION;

END {
    # For VMS.
    delete $ENV{HARNESS_ACTIVE};
    delete $ENV{HARNESS_VERSION};
}

# Some experimental versions of OS/2 build have broken $?
my $Ignore_Exitcode = $ENV{HARNESS_IGNORE_EXITCODE};

my $Files_In_Dir = $ENV{HARNESS_FILELEAK_IN_DIR};

$Strap = Test::Harness::Straps->new;

sub strap { return $Strap };

@ISA = ('Exporter');
@EXPORT    = qw(&runtests);
@EXPORT_OK = qw($verbose $switches);

$Verbose  = $ENV{HARNESS_VERBOSE} || 0;
$Debug    = $ENV{HARNESS_DEBUG} || 0;
$Switches = "-w";
$Columns  = $ENV{HARNESS_COLUMNS} || $ENV{COLUMNS} || 80;
$Columns--;             # Some shells have trouble with a full line of text.
$Timer    = $ENV{HARNESS_TIMER} || 0;

=head1 SYNOPSIS

  use Test::Harness;

  runtests(@test_files);

=head1 DESCRIPTION

B<STOP!> If all you want to do is write a test script, consider
using Test::Simple.  Test::Harness is the module that reads the
output from Test::Simple, Test::More and other modules based on
Test::Builder.  You don't need to know about Test::Harness to use
those modules.

Test::Harness runs tests and expects output from the test in a
certain format.  That format is called TAP, the Test Anything
Protocol.  It is defined in L<Test::Harness::TAP>.

C<Test::Harness::runtests(@tests)> runs all the testscripts named
as arguments and checks standard output for the expected strings
in TAP format.

The F<prove> utility is a thin wrapper around Test::Harness.

=head2 Taint mode

Test::Harness will honor the C<-T> or C<-t> in the #! line on your
test files.  So if you begin a test with:

    #!perl -T

the test will be run with taint mode on.

=head2 Configuration variables.

These variables can be used to configure the behavior of
Test::Harness.  They are exported on request.

=over 4

=item C<$Test::Harness::Verbose>

The package variable C<$Test::Harness::Verbose> is exportable and can be
used to let C<runtests()> display the standard output of the script
without altering the behavior otherwise.  The F<prove> utility's C<-v>
flag will set this.

=item C<$Test::Harness::switches>

The package variable C<$Test::Harness::switches> is exportable and can be
used to set perl command line options used for running the test
script(s). The default value is C<-w>. It overrides C<HARNESS_SWITCHES>.

=item C<$Test::Harness::Timer>

If set to true, and C<Time::HiRes> is available, print elapsed seconds
after each test file.

=back


=head2 Failure

When tests fail, analyze the summary report:

  t/base..............ok
  t/nonumbers.........ok
  t/ok................ok
  t/test-harness......ok
  t/waterloo..........dubious
          Test returned status 3 (wstat 768, 0x300)
  DIED. FAILED tests 1, 3, 5, 7, 9, 11, 13, 15, 17, 19
          Failed 10/20 tests, 50.00% okay
  Failed Test  Stat Wstat Total Fail  Failed  List of Failed
  -----------------------------------------------------------------------
  t/waterloo.t    3   768    20   10  50.00%  1 3 5 7 9 11 13 15 17 19
  Failed 1/5 test scripts, 80.00% okay. 10/44 subtests failed, 77.27% okay.

Everything passed but F<t/waterloo.t>.  It failed 10 of 20 tests and
exited with non-zero status indicating something dubious happened.

The columns in the summary report mean:

=over 4

=item B<Failed Test>

The test file which failed.

=item B<Stat>

If the test exited with non-zero, this is its exit status.

=item B<Wstat>

The wait status of the test.

=item B<Total>

Total number of tests expected to run.

=item B<Fail>

Number which failed, either from "not ok" or because they never ran.

=item B<Failed>

Percentage of the total tests which failed.

=item B<List of Failed>

A list of the tests which failed.  Successive failures may be
abbreviated (ie. 15-20 to indicate that tests 15, 16, 17, 18, 19 and
20 failed).

=back


=head2 Functions

Test::Harness currently only has one function, here it is.

=over 4

=item B<runtests>

  my $allok = runtests(@test_files);

This runs all the given I<@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 C<die()> with
one of the messages in the DIAGNOSTICS section.

=cut

sub runtests {
    my(@tests) = @_;

    local ($\, $,);

    my($tot, $failedtests) = _run_all_tests(@tests);
    _show_results($tot, $failedtests);

    my $ok = _all_ok($tot);

    assert(($ok xor keys %$failedtests), 
           q{ok status jives with $failedtests});

    return $ok;
}

=begin _private

=item B<_all_ok>

  my $ok = _all_ok(\%tot);

Tells you if this test run is overall successful or not.

=cut

sub _all_ok {
    my($tot) = shift;

    return $tot->{bad} == 0 && ($tot->{max} || $tot->{skipped}) ? 1 : 0;
}

=item B<_globdir>

  my @files = _globdir $dir;

Returns all the files in a directory.  This is shorthand for backwards
compatibility on systems where C<glob()> doesn't work right.

=cut

sub _globdir { 
    opendir DIRH, shift; 
    my @f = readdir DIRH; 
    closedir DIRH; 

    return @f;
}

=item B<_run_all_tests>

  my($total, $failed) = _run_all_tests(@test_files);

Runs all the given C<@test_files> (as C<runtests()>) but does it
quietly (no report).  $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 C<< $total->{bad} == 0 >> and C<< $total->{max} > 0 >>, you've
got a successful test.

$failed is a hash ref of all the test scripts which 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
    percent     Percentage of tests which failed
    canon       List of tests which failed (as string).

C<$failed> should be empty if everything passed.

B<NOTE> Currently this function is still noisy.  I'm working on it.

=cut

# Turns on autoflush for the handle passed
sub _autoflush {
    my $flushy_fh = shift;
    my $old_fh = select $flushy_fh;
    $| = 1;
    select $old_fh;
}

sub _run_all_tests {
    my @tests = @_;

    _autoflush(\*STDOUT);
    _autoflush(\*STDERR);

    my(%failedtests);

    # Test-wide totals.
    my(%tot) = (
                bonus    => 0,
                max      => 0,
                ok       => 0,
                files    => 0,
                bad      => 0,
                good     => 0,
                tests    => scalar @tests,
                sub_skipped  => 0,
                todo     => 0,
                skipped  => 0,
                bench    => 0,
               );

    my @dir_files;
    @dir_files = _globdir $Files_In_Dir if defined $Files_In_Dir;
    my $run_start_time = new Benchmark;

    my $width = _leader_width(@tests);
    foreach my $tfile (@tests) {
        $Last_ML_Print = 0;  # so each test prints at least once
        my($leader, $ml) = _mk_leader($tfile, $width);
        local $ML = $ml;

        print $leader;

        $tot{files}++;

        $Strap->{_seen_header} = 0;
        if ( $Test::Harness::Debug ) {
            print "# Running: ", $Strap->_command_line($tfile), "\n";
        }
        my $test_start_time = $Timer ? time : 0;
        my %results = $Strap->analyze_file($tfile) or
          do { warn $Strap->{error}, "\n";  next };
        my $elapsed;
        if ( $Timer ) {
            $elapsed = time - $test_start_time;
            if ( $has_time_hires ) {
                $elapsed = sprintf( " %8.3fs", $elapsed );
            }
            else {
                $elapsed = sprintf( " %8ss", $elapsed ? $elapsed : "<1" );
            }
        }
        else {
            $elapsed = "";
        }

        # state of the current test.
        my @failed = grep { !$results{details}[$_-1]{ok} }
                     1..@{$results{details}};
        my %test = (
                    ok          => $results{ok},
                    'next'      => $Strap->{'next'},
                    max         => $results{max},
                    failed      => \@failed,
                    bonus       => $results{bonus},
                    skipped     => $results{skip},
                    skip_reason => $results{skip_reason},
                    skip_all    => $Strap->{skip_all},
                    ml          => $ml,
                   );

        $tot{bonus}       += $results{bonus};
        $tot{max}         += $results{max};
        $tot{ok}          += $results{ok};
        $tot{todo}        += $results{todo};
        $tot{sub_skipped} += $results{skip};

        my($estatus, $wstatus) = @results{qw(exit wait)};

        if ($results{passing}) {
            # XXX Combine these first two
            if ($test{max} and $test{skipped} + $test{bonus}) {
                my @msg;
                push(@msg, "$test{skipped}/$test{max} skipped: $test{skip_reason}")
                    if $test{skipped};
                push(@msg, "$test{bonus}/$test{max} unexpectedly succeeded")
                    if $test{bonus};
                print "$test{ml}ok$elapsed\n        ".join(', ', @msg)."\n";
            }
            elsif ( $test{max} ) {
                print "$test{ml}ok$elapsed\n";
            }
            elsif ( defined $test{skip_all} and length $test{skip_all} ) {
                print "skipped\n        all skipped: $test{skip_all}\n";
                $tot{skipped}++;
            }
            else {
                print "skipped\n        all skipped: no reason given\n";
                $tot{skipped}++;
            }
            $tot{good}++;
        }
        else {
            # List unrun tests as failures.
            if ($test{'next'} <= $test{max}) {
                push @{$test{failed}}, $test{'next'}..$test{max};
            }
            # List overruns as failures.
            else {
                my $details = $results{details};
                foreach my $overrun ($test{max}+1..@$details) {
                    next unless ref $details->[$overrun-1];
                    push @{$test{failed}}, $overrun
                }
            }

            if ($wstatus) {
                $failedtests{$tfile} = _dubious_return(\%test, \%tot, 
                                                       $estatus, $wstatus);
                $failedtests{$tfile}{name} = $tfile;
            }
            elsif($results{seen}) {
                if (@{$test{failed}} and $test{max}) {
                    my ($txt, $canon) = _canonfailed($test{max},$test{skipped},
                                                    @{$test{failed}});
                    print "$test{ml}$txt";
                    $failedtests{$tfile} = { canon   => $canon,
                                             max     => $test{max},
                                             failed  => scalar @{$test{failed}},
                                             name    => $tfile, 
                                             percent => 100*(scalar @{$test{failed}})/$test{max},
                                             estat   => '',
                                             wstat   => '',
                                           };
                }
                else {
                    print "Don't know which tests failed: got $test{ok} ok, ".
                          "expected $test{max}\n";
                    $failedtests{$tfile} = { canon   => '??',
                                             max     => $test{max},
                                             failed  => '??',
                                             name    => $tfile, 
                                             percent => undef,
                                             estat   => '', 
                                             wstat   => '',
                                           };
                }
                $tot{bad}++;
            }
            else {
                print "FAILED before any test output arrived\n";
                $tot{bad}++;
                $failedtests{$tfile} = { canon       => '??',
                                         max         => '??',
                                         failed      => '??',
                                         name        => $tfile,
                                         percent     => undef,
                                         estat       => '', 
                                         wstat       => '',
                                       };
            }
        }

        if (defined $Files_In_Dir) {
            my @new_dir_files = _globdir $Files_In_Dir;
            if (@new_dir_files != @dir_files) {
                my %f;
                @f{@new_dir_files} = (1) x @new_dir_files;
                delete @f{@dir_files};
                my @f = sort keys %f;
                print "LEAKED FILES: @f\n";
                @dir_files = @new_dir_files;
            }
        }
    } # foreach test
    $tot{bench} = timediff(new Benchmark, $run_start_time);

    $Strap->_restore_PERL5LIB;

    return(\%tot, \%failedtests);
}

=item B<_mk_leader>

  my($leader, $ml) = _mk_leader($test_file, $width);

Generates the 't/foo........' leader for the given C<$test_file> as well
as a similar version which will overwrite the current line (by use of
\r and such).  C<$ml> may be empty if Test::Harness doesn't think you're
on TTY.

The C<$width> is the width of the "yada/blah.." string.

=cut

sub _mk_leader {
    my($te, $width) = @_;
    chomp($te);
    $te =~ s/\.\w+$/./;

    if ($^O eq 'VMS') {
        $te =~ s/^.*\.t\./\[.t./s;
    }
    my $leader = "$te" . '.' x ($width - length($te));
    my $ml = "";

    if ( -t STDOUT and not $ENV{HARNESS_NOTTY} and not $Verbose ) {
        $ml = "\r" . (' ' x 77) . "\r$leader"
    }

    return($leader, $ml);
}

=item B<_leader_width>

  my($width) = _leader_width(@test_files);

Calculates how wide the leader should be based on the length of the
longest test name.

=cut

sub _leader_width {
    my $maxlen = 0;
    my $maxsuflen = 0;
    foreach (@_) {