builder.pm

linux 下的源代码分析阅读器 red hat公司新版

Like Test::More's isnt().  Checks if $got ne $dont_expect.  This is
the string version.

=item B<isnt_num>

  $Test->is_num($got, $dont_expect, $name);

Like Test::More's isnt().  Checks if $got ne $dont_expect.  This is
the numeric version.

=cut

sub isnt_eq {
    my($self, $got, $dont_expect, $name) = @_;
    local $Level = $Level + 1;

    if( !defined $got || !defined $dont_expect ) {
        # undef only matches undef and nothing else
        my $test = defined $got || defined $dont_expect;

        $self->ok($test, $name);
        $self->_cmp_diag($got, 'ne', $dont_expect) unless $test;
        return $test;
    }

    return $self->cmp_ok($got, 'ne', $dont_expect, $name);
}

sub isnt_num {
    my($self, $got, $dont_expect, $name) = @_;
    local $Level = $Level + 1;

    if( !defined $got || !defined $dont_expect ) {
        # undef only matches undef and nothing else
        my $test = defined $got || defined $dont_expect;

        $self->ok($test, $name);
        $self->_cmp_diag($got, '!=', $dont_expect) unless $test;
        return $test;
    }

    return $self->cmp_ok($got, '!=', $dont_expect, $name);
}


=item B<like>

  $Test->like($this, qr/$regex/, $name);
  $Test->like($this, '/$regex/', $name);

Like Test::More's like().  Checks if $this matches the given $regex.

You'll want to avoid qr// if you want your tests to work before 5.005.

=item B<unlike>

  $Test->unlike($this, qr/$regex/, $name);
  $Test->unlike($this, '/$regex/', $name);

Like Test::More's unlike().  Checks if $this B<does not match> the
given $regex.

=cut

sub like {
    my($self, $this, $regex, $name) = @_;

    local $Level = $Level + 1;
    $self->_regex_ok($this, $regex, '=~', $name);
}

sub unlike {
    my($self, $this, $regex, $name) = @_;

    local $Level = $Level + 1;
    $self->_regex_ok($this, $regex, '!~', $name);
}

=item B<maybe_regex>

  $Test->maybe_regex(qr/$regex/);
  $Test->maybe_regex('/$regex/');

Convenience method for building testing functions that take regular
expressions as arguments, but need to work before perl 5.005.

Takes a quoted regular expression produced by qr//, or a string
representing a regular expression.

Returns a Perl value which may be used instead of the corresponding
regular expression, or undef if it's argument is not recognised.

For example, a version of like(), sans the useful diagnostic messages,
could be written as:

  sub laconic_like {
      my ($self, $this, $regex, $name) = @_;
      my $usable_regex = $self->maybe_regex($regex);
      die "expecting regex, found '$regex'\n"
          unless $usable_regex;
      $self->ok($this =~ m/$usable_regex/, $name);
  }

=cut


sub maybe_regex {
    my ($self, $regex) = @_;
    my $usable_regex = undef;

    return $usable_regex unless defined $regex;

    my($re, $opts);

    # Check for qr/foo/
    if( ref $regex eq 'Regexp' ) {
        $usable_regex = $regex;
    }
    # Check for '/foo/' or 'm,foo,'
    elsif( ($re, $opts)        = $regex =~ m{^ /(.*)/ (\w*) $ }sx           or
           (undef, $re, $opts) = $regex =~ m,^ m([^\w\s]) (.+) \1 (\w*) $,sx
         )
    {
        $usable_regex = length $opts ? "(?$opts)$re" : $re;
    }

    return $usable_regex;
};

sub _regex_ok {
    my($self, $this, $regex, $cmp, $name) = @_;

    local $Level = $Level + 1;

    my $ok = 0;
    my $usable_regex = $self->maybe_regex($regex);
    unless (defined $usable_regex) {
        $ok = $self->ok( 0, $name );
        $self->diag("    '$regex' doesn't look much like a regex to me.");
        return $ok;
    }

    {
        local $^W = 0;
        my $test = $this =~ /$usable_regex/ ? 1 : 0;
        $test = !$test if $cmp eq '!~';
        $ok = $self->ok( $test, $name );
    }

    unless( $ok ) {
        $this = defined $this ? "'$this'" : 'undef';
        my $match = $cmp eq '=~' ? "doesn't match" : "matches";
        $self->diag(sprintf <<DIAGNOSTIC, $this, $match, $regex);
                  %s
    %13s '%s'
DIAGNOSTIC

    }

    return $ok;
}

=item B<cmp_ok>

  $Test->cmp_ok($this, $type, $that, $name);

Works just like Test::More's cmp_ok().

    $Test->cmp_ok($big_num, '!=', $other_big_num);

=cut

sub cmp_ok {
    my($self, $got, $type, $expect, $name) = @_;

    my $test;
    {
        local $^W = 0;
        local($@,$!);   # don't interfere with $@
                        # eval() sometimes resets $!
        $test = eval "\$got $type \$expect";
    }
    local $Level = $Level + 1;
    my $ok = $self->ok($test, $name);

    unless( $ok ) {
        if( $type =~ /^(eq|==)$/ ) {
            $self->_is_diag($got, $type, $expect);
        }
        else {
            $self->_cmp_diag($got, $type, $expect);
        }
    }
    return $ok;
}

sub _cmp_diag {
    my($self, $got, $type, $expect) = @_;
    
    $got    = defined $got    ? "'$got'"    : 'undef';
    $expect = defined $expect ? "'$expect'" : 'undef';
    return $self->diag(sprintf <<DIAGNOSTIC, $got, $type, $expect);
    %s
        %s
    %s
DIAGNOSTIC
}

=item B<BAILOUT>

    $Test->BAILOUT($reason);

Indicates to the Test::Harness that things are going so badly all
testing should terminate.  This includes running any additional test
scripts.

It will exit with 255.

=cut

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

    $self->_print("Bail out!  $reason");
    exit 255;
}

=item B<skip>

    $Test->skip;
    $Test->skip($why);

Skips the current test, reporting $why.

=cut

sub skip {
    my($self, $why) = @_;
    $why ||= '';
    $self->_unoverload(\$why);

    unless( $Have_Plan ) {
        require Carp;
        Carp::croak("You tried to run tests without a plan!  Gotta have a plan.");
    }

    lock($Curr_Test);
    $Curr_Test++;

    $Test_Results[$Curr_Test-1] = &share({
        'ok'      => 1,
        actual_ok => 1,
        name      => '',
        type      => 'skip',
        reason    => $why,
    });

    my $out = "ok";
    $out   .= " $Curr_Test" if $self->use_numbers;
    $out   .= " # skip";
    $out   .= " $why"       if length $why;
    $out   .= "\n";

    $Test->_print($out);

    return 1;
}


=item B<todo_skip>

  $Test->todo_skip;
  $Test->todo_skip($why);

Like skip(), only it will declare the test as failing and TODO.  Similar
to

    print "not ok $tnum # TODO $why\n";

=cut

sub todo_skip {
    my($self, $why) = @_;
    $why ||= '';

    unless( $Have_Plan ) {
        require Carp;
        Carp::croak("You tried to run tests without a plan!  Gotta have a plan.");
    }

    lock($Curr_Test);
    $Curr_Test++;

    $Test_Results[$Curr_Test-1] = &share({
        'ok'      => 1,
        actual_ok => 0,
        name      => '',
        type      => 'todo_skip',
        reason    => $why,
    });

    my $out = "not ok";
    $out   .= " $Curr_Test" if $self->use_numbers;
    $out   .= " # TODO & SKIP $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;
}


=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

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 below.

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

=cut

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 @msgs.  Like C<print>, arguments are simply
appended together.

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.

Returns false.  Why?  Because diag() is often used in conjunction with
a failing test (C<ok() || diag()>) it "passes through" the failure.

    return ok(...) || diag(...);

=for blame transfer
Mark Fowler <[e-mail]>

=cut

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

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

    # Smash args together like print does.
    # Convert undef to 'undef' so its readable.
    my $msg = join '', map { defined($_) ? $_ : 'undef' } @msgs;

    # Escape each line with a #.
    $msg =~ s/^/# /gm;

    # Stick a newline on the end if it needs it.
    $msg .= "\n" unless $msg =~ /\n\Z/;

    local $Level = $Level + 1;
    $self->_print_diag($msg);

    return 0;
}

=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;

    my $msg = join '', @msgs;

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

    # Escape each line after the first with a # so we don't
    # confuse Test::Harness.
    $msg =~ s/\n(.)/\n# $1/sg;

    # Stick a newline on the end if it needs it.
    $msg .= "\n" unless $msg =~ /\n\Z/;

    print $fh $msg;
}


=item B<_print_diag>

    $Test->_print_diag(@msg);