This file is indexed.

/usr/share/perl5/Test2/Compare/Delta.pm is in libtest2-suite-perl 0.000102-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
package Test2::Compare::Delta;
use strict;
use warnings;

our $VERSION = '0.000102';

use Test2::Util::HashBase qw{verified id got chk children dne exception note};

use Test2::Util::Table();
use Test2::API qw/context/;

use Test2::Util::Ref qw/render_ref rtype/;
use Carp qw/croak/;

# 'CHECK' constant would not work, but I like exposing 'check()' to people
# using this class.
BEGIN {
    no warnings 'once';
    *check = \&chk;
    *set_check = \&set_chk;
}

my @COLUMN_ORDER = qw/PATH GLNs GOT OP CHECK CLNs/;
my %COLUMNS = (
    GOT   => {name => 'GOT',   value => sub { $_[0]->render_got },   no_collapse => 1},
    CHECK => {name => 'CHECK', value => sub { $_[0]->render_check }, no_collapse => 1},
    OP    => {name => 'OP',    value => sub { $_[0]->table_op }                      },
    PATH  => {name => 'PATH',  value => sub { $_[1] }                                },

    'GLNs' => {name => 'GLNs', alias => 'LNs', value => sub { $_[0]->table_got_lines }  },
    'CLNs' => {name => 'CLNs', alias => 'LNs', value => sub { $_[0]->table_check_lines }},
);

sub remove_column {
    my $class = shift;
    my $header = shift;
    @COLUMN_ORDER = grep { $_ ne $header } @COLUMN_ORDER;
    delete $COLUMNS{$header} ? 1 : 0;
}

sub add_column {
    my $class = shift;
    my $name = shift;

    croak "Column name is required"
        unless $name;

    croak "Column '$name' is already defined"
        if $COLUMNS{$name};

    my %params;
    if (@_ == 1) {
        %params = (value => @_, name => $name);
    }
    else {
        %params = (@_, name => $name);
    }

    my $value = $params{value};

    croak "You must specify a 'value' callback"
        unless $value;

    croak "'value' callback must be a CODE reference"
        unless rtype($value) eq 'CODE';

    if ($params{prefix}) {
        unshift @COLUMN_ORDER => $name;
    }
    else {
        push @COLUMN_ORDER => $name;
    }

    $COLUMNS{$name} = \%params;
}

sub set_column_alias {
    my ($class, $name, $alias) = @_;

    croak "Tried to alias a non-existent column"
        unless exists $COLUMNS{$name};

    croak "Missing alias" unless defined $alias;

    $COLUMNS{$name}->{alias} = $alias;
}

sub init {
    my $self = shift;

    croak "Cannot specify both 'check' and 'chk' as arguments"
        if exists($self->{check}) && exists($self->{+CHK});

    # Allow 'check' as an argument
    $self->{+CHK} ||= delete $self->{check}
        if exists $self->{check};
}

sub render_got {
    my $self = shift;

    my $exp = $self->{+EXCEPTION};
    if ($exp) {
        chomp($exp = "$exp");
        $exp =~ s/\n.*$//g;
        return "<EXCEPTION: $exp>";
    }

    my $dne = $self->{+DNE};
    return '<DOES NOT EXIST>' if $dne && $dne eq 'got';

    my $got = $self->{+GOT};
    return '<UNDEF>' unless defined $got;

    my $check = $self->{+CHK};
    my $stringify = defined( $check ) && $check->stringify_got;

    return render_ref($got) if ref $got && !$stringify;

    return "$got";
}

sub render_check {
    my $self = shift;

    my $dne = $self->{+DNE};
    return '<DOES NOT EXIST>' if $dne && $dne eq 'check';

    my $check = $self->{+CHK};
    return '<UNDEF>' unless defined $check;

    return $check->render;
}

sub _full_id {
    my ($type, $id) = @_;
    return "<$id>" if !$type || $type eq 'META';
    return $id     if $type eq 'SCALAR';
    return "{$id}" if $type eq 'HASH';
    return "{$id} <KEY>" if $type eq 'HASHKEY';
    return "[$id]" if $type eq 'ARRAY';
    return "$id()" if $type eq 'METHOD';
    return "$id" if $type eq 'DEREF';
    return "<$id>";
}

sub _arrow_id {
    my ($path, $type) = @_;
    return '' unless $path;

    return ' ' if !$type || $type eq 'META';    # Meta gets a space, not an arrow

    return '->' if $type eq 'METHOD';           # Method always needs an arrow
    return '->' if $type eq 'SCALAR';           # Scalar always needs an arrow
    return '->' if $type eq 'DEREF';            # deref always needs arrow
    return '->' if $path =~ m/(>|\(\))$/;       # Need an arrow after meta, or after a method
    return '->' if $path eq '$VAR';             # Need an arrow after the initial ref

    # Hash and array need an arrow unless they follow another hash/array
    return '->' if $type =~ m/^(HASH|ARRAY)$/ && $path !~ m/(\]|\})$/;

    # No arrow needed
    return '';
}

sub _join_id {
    my ($path, $parts) = @_;
    my ($type, $key) = @$parts;

    my $id   = _full_id($type, $key);
    my $join = _arrow_id($path, $type);

    return "${path}${join}${id}";
}

sub should_show {
    my $self = shift;
    return 1 unless $self->verified;
    defined( my $check = $self->check ) || return 0;
    return 0 unless $check->lines;
    my $file = $check->file || return 0;

    my $ctx = context();
    my $cfile = $ctx->trace->file;
    $ctx->release;
    return 0 unless $file eq $cfile;

    return 1;
}

sub filter_visible {
    my $self = shift;

    my @deltas;
    my @queue = (['', $self]);

    while (my $set = shift @queue) {
        my ($path, $delta) = @$set;

        push @deltas => [$path, $delta] if $delta->should_show;

        my $children = $delta->children || next;
        next unless @$children;

        my @new;
        for my $child (@$children) {
            my $cpath = _join_id($path, $child->id);
            push @new => [$cpath, $child];
        }
        unshift @queue => @new;
    }

    return \@deltas;
}

sub table_header { [map {$COLUMNS{$_}->{alias} || $_} @COLUMN_ORDER] }

sub table_op {
    my $self = shift;

    defined( my $check = $self->{+CHK} ) || return '!exists';

    return $check->operator($self->{+GOT})
        unless $self->{+DNE} && $self->{+DNE} eq 'got';

    return $check->operator();
}

sub table_check_lines {
    my $self = shift;

    defined( my $check = $self->{+CHK} ) || return '';
    my $lines = $check->lines || return '';

    return '' unless @$lines;

    return join ', ' => @$lines;
}

sub table_got_lines {
    my $self = shift;

    defined( my $check = $self->{+CHK} ) || return '';
    return '' if $self->{+DNE} && $self->{+DNE} eq 'got';

    my @lines = $check->got_lines($self->{+GOT});
    return '' unless @lines;

    return join ', ' => @lines;
}

sub table_rows {
    my $self = shift;

    my $deltas = $self->filter_visible;

    my @rows;
    for my $set (@$deltas) {
        my ($id, $d) = @$set;

        my @row;
        for my $col (@COLUMN_ORDER) {
            my $spec = $COLUMNS{$col};
            my $val = $spec->{value}->($d, $id);
            $val = '' unless defined $val;
            push @row => $val;
        }

        push @rows => \@row;
    }

    return \@rows;
}

sub table {
    my $self = shift;

    my @diag;
    my $header = $self->table_header;
    my $rows   = $self->table_rows;

    my $max = exists $ENV{TS_MAX_DELTA} ? $ENV{TS_MAX_DELTA} : 25;
    if ($max && @$rows > $max) {
        @$rows = @{$rows}[0 .. ($max - 1)];
        @diag = (
            "************************************************************",
            sprintf("* Stopped after %-42.42s *", "$max differences."),
            "* Set the TS_MAX_DELTA environment var to raise the limit. *",
            "* Set it to 0 for no limit.                                *",
            "************************************************************",
        );
    }

    return (
        Test2::Util::Table::table(
            header      => $header,
            rows        => $rows,
            collapse    => 1,
            sanitize    => 1,
            mark_tail   => 1,
            no_collapse => [grep { $COLUMNS{$COLUMN_ORDER[$_]}->{no_collapse} } 0 .. $#COLUMN_ORDER],
        ),
        @diag,
    );
}

sub diag {
    my $self = shift;
    return join("\n" => $self->table);
}

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

Test2::Compare::Delta - Representation of differences between nested data
structures.

=head1 DESCRIPTION

This is used by L<Test2::Compare>. When data structures are compared a
delta will be returned. Deltas are a tree data structure that represent all the
differences between two other data structures.

=head1 METHODS

=head2 CLASS METHODS

=over 4

=item $class->add_column($NAME => sub { ... })

=item $class->add_column($NAME, %PARAMS)

This can be used to add columns to the table that it produced when a comparison
fails. The first argument should always be the column name, which must be
unique.

The first form simply takes a coderef that produces the value that should be
displayed in the column for any given delta. The arguments passed into the sub
are the delta, and the row ID.

    Test2::Compare::Delta->add_column(
        Foo => sub {
            my ($delta, $id) = @_;
            return $delta->... ? 'foo' : 'bar'
        },
    );

The second form allows you some extra options. The C<'value'> key is required,
and must be a coderef. All other keys are optional.

    Test2::Compare::Delta->add_column(
        'Foo',    # column name
        value => sub { ... },    # how to get the cell value
        alias       => 'FOO',    # Display name (used in table header)
        no_collapse => $bool,    # Show column even if it has no values?
    );

=item $bool = $class->remove_column($NAME)

This will remove the specified column. This will return true if the column
existed and was removed. This will return false if the column did not exist. No
exceptions are thrown. If a missing column is a problem then you need to check
the return yourself.

=item $class->set_column_alias($NAME, $ALIAS)

This can be used to change the table header, overriding the default column
names with new ones.

=back

=head2 ATTRIBUTES

=over 4

=item $bool = $delta->verified

=item $delta->set_verified($bool)

This will be true if the delta itself matched, if the delta matched then the
problem is in the delta's children, not the delta itself.

=item $aref = $delta->id

=item $delta->set_id([$type, $name])

ID for the delta, used to produce the path into the data structure. An
example is C<< ['HASH' => 'foo'] >> which means the delta is in the path
C<< ...->{'foo'} >>. Valid types are C<HASH>, C<ARRAY>, C<SCALAR>, C<META>, and
C<METHOD>.

=item $val = $delta->got

=item $delta->set_got($val)

Deltas are produced by comparing a received data structure 'got' against a
check data structure 'check'. The 'got' attribute contains the value that was
received for comparison.

=item $check = $delta->chk

=item $check = $delta->check

=item $delta->set_chk($check)

=item $delta->set_check($check)

Deltas are produced by comparing a received data structure 'got' against a
check data structure 'check'. The 'check' attribute contains the value that was
expected in the comparison.

C<check> and C<chk> are aliases for the same attribute.

=item $aref = $delta->children

=item $delta->set_children([$delta1, $delta2, ...])

A Delta may have child deltas. If it does then this is an arrayref with those
children.

=item $dne = $delta->dne

=item $delta->set_dne($dne)

Sometimes a comparison results in one side or the other not existing at all, in
which case this is set to the name of the attribute that does not exist. This
can be set to 'got' or 'check'.

=item $e = $delta->exception

=item $delta->set_exception($e)

This will be set to the exception in cases where the comparison failed due to
an exception being thrown.

=back

=head2 OTHER

=over 4

=item $string = $delta->render_got

Renders the string that should be used in a table to represent the received
value in a comparison.

=item $string = $delta->render_check

Renders the string that should be used in a table to represent the expected
value in a comparison.

=item $bool = $delta->should_show

This will return true if the delta should be shown in the table. This is
normally true for any unverified delta. This will also be true for deltas that
contain extra useful debug information.

=item $aref = $delta->filter_visible

This will produce an arrayref of C<< [ $path => $delta ] >> for all deltas that
should be displayed in the table.

=item $aref = $delta->table_header

This returns an array ref of the headers for the table.

=item $string = $delta->table_op

This returns the operator that should be shown in the table.

=item $string = $delta->table_check_lines

This returns the defined lines (extra debug info) that should be displayed.

=item $string = $delta->table_got_lines

This returns the generated lines (extra debug info) that should be displayed.

=item $aref = $delta->table_rows

This returns an arrayref of table rows, each row is itself an arrayref.

=item @table_lines = $delta->table

Returns all the lines of the table that should be displayed.

=back

=head1 SOURCE

The source code repository for Test2-Suite can be found at
F<https://github.com/Test-More/Test2-Suite/>.

=head1 MAINTAINERS

=over 4

=item Chad Granum E<lt>exodist@cpan.orgE<gt>

=back

=head1 AUTHORS

=over 4

=item Chad Granum E<lt>exodist@cpan.orgE<gt>

=back

=head1 COPYRIGHT

Copyright 2017 Chad Granum E<lt>exodist@cpan.orgE<gt>.

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

See F<http://dev.perl.org/licenses/>

=cut