dist/Data-Dumper/t/indent.t

   1 #!./perl -w
   2 # t/indent.t - Test Indent()
   3 BEGIN {
   4     if ($ENV{PERL_CORE}){
   5         require Config; import Config;
   6         no warnings 'once';
   7         if ($Config{'extensions'} !~ /\bData\/Dumper\b/) {
   8             print "1..0 # Skip: Data::Dumper was not built\n";
   9             exit 0;
  10         }
  11     }
  12 }
  13
  14 use strict;
  15
  16 use Data::Dumper;
  17 use Test::More tests => 9;
  18 use lib qw( ./t/lib );
  19 use Testing qw( _dumptostr );
  20
  21
  22 my $hash = { foo => 42 };
  23
  24 my (%dumpstr);
  25 my $dumper;
  26
  27 $dumper = Data::Dumper->new([$hash]);
  28 $dumpstr{noindent} = _dumptostr($dumper);
  29 # $VAR1 = {
  30 #           'foo' => 42
  31 #         };
  32
  33 $dumper = Data::Dumper->new([$hash]);
  34 $dumper->Indent();
  35 $dumpstr{indent_no_arg} = _dumptostr($dumper);
  36
  37 $dumper = Data::Dumper->new([$hash]);
  38 $dumper->Indent(0);
  39 $dumpstr{indent_0} = _dumptostr($dumper);
  40 # $VAR1 = {'foo' => 42}; # no newline
  41
  42 $dumper = Data::Dumper->new([$hash]);
  43 $dumper->Indent(1);
  44 $dumpstr{indent_1} = _dumptostr($dumper);
  45 # $VAR1 = {
  46 #   'foo' => 42
  47 # };
  48
  49 $dumper = Data::Dumper->new([$hash]);
  50 $dumper->Indent(2);
  51 $dumpstr{indent_2} = _dumptostr($dumper);
  52 # $VAR1 = {
  53 #           'foo' => 42
  54 #         };
  55
  56 is($dumpstr{noindent}, $dumpstr{indent_no_arg},
  57     "absence of Indent is same as Indent()");
  58 isnt($dumpstr{noindent}, $dumpstr{indent_0},
  59     "absence of Indent is different from Indent(0)");
  60 isnt($dumpstr{indent_0}, $dumpstr{indent_1},
  61     "Indent(0) is different from Indent(1)");
  62 cmp_ok(length($dumpstr{indent_0}), '<=', length($dumpstr{indent_1}),
  63     "Indent(0) is more compact than Indent(1)");
  64 is($dumpstr{noindent}, $dumpstr{indent_2},
  65     "absence of Indent is same as Indent(2), i.e., 2 is default");
  66 cmp_ok(length($dumpstr{indent_1}), '<=', length($dumpstr{indent_2}),
  67     "Indent(1) is more compact than Indent(2)");
  68
  69 my $array = [ qw| foo 42 | ];
  70 $dumper = Data::Dumper->new([$array]);
  71 $dumper->Indent(2);
  72 $dumpstr{ar_indent_2} = _dumptostr($dumper);
  73 # $VAR1 = [
  74 #           'foo',
  75 #           '42'
  76 #         ];
  77
  78 $dumper = Data::Dumper->new([$array]);
  79 $dumper->Indent(3);
  80 $dumpstr{ar_indent_3} = _dumptostr($dumper);
  81 # $VAR1 = [
  82 #           #0
  83 #           'foo',
  84 #           #1
  85 #           '42'
  86 #         ];
  87
  88 isnt($dumpstr{ar_indent_2}, $dumpstr{ar_indent_3},
  89     "On arrays, Indent(2) is different from Indent(3)");
  90 like($dumpstr{ar_indent_3},
  91     qr/\#0.+'foo'.+\#1.+42/s,
  92     "Indent(3) annotates array elements with their indices"
  93 );
  94 {
  95     no if $] < 5.011, warnings => 'deprecated';
  96     is(scalar(split("\n" => $dumpstr{ar_indent_2})) + 2,
  97         scalar(split("\n" => $dumpstr{ar_indent_3})),
  98         "Indent(3) runs 2 lines longer than Indent(2)");
  99 }
 100
 101 __END__
 102 is($dumpstr{noindent}, $dumpstr{indent_0},
 103     "absence of Indent is same as Indent(0)");
 104 isnt($dumpstr{noindent}, $dumpstr{indent_1},
 105     "absence of Indent is different from Indent(1)");
 106 print STDERR $dumpstr{indent_0};
 107 print STDERR $dumpstr{ar_indent_3};