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#!/usr/bin/perl
# code/dump-style regression tests for known lexing problems.
# Some other regressions tests are included here for simplicity.
use strict;
BEGIN {
no warnings 'once';
$| = 1;
$PPI::XS_DISABLE = 1;
$PPI::Lexer::X_TOKENIZER ||= $ENV{X_TOKENIZER};
}
use File::Spec::Functions ':ALL';
use PPI::Lexer;
use PPI::Dumper;
use Carp 'croak';
use Params::Util qw{_INSTANCE};
sub pause {
local $@;
eval { require Time::HiRes; };
$@ ? sleep(1) : Time::HiRes::sleep(0.1);
}
#####################################################################
# Prepare
use vars qw{@FAILURES};
BEGIN {
@FAILURES = (
# Failed cases 3 chars or less
'!%:', '!%:', '!%:', '!%:', '!*:', '!@:', '%:', '%:,',
'%:;', '*:', '*:,', '*::', '*:;', '+%:', '+*:', '+@:',
'-%:', '-*:', '-@:', ';%:', ';*:', ';@:', '@:', '@:,',
'@::', '@:;', '\%:', '\&:', '\*:', '\@:', '~%:', '~*:',
'~@:', '(<', '(<', '=<', 'm(', 'm(', 'm<', 'm[',
'm{', 'q(', 'q<', 'q[', 'q{', 's(', 's<', 's[',
's{', 'y(', 'y<', 'y[', 'y{', '$\'0', '009', '0bB',
'0xX', '009;', '0bB;', '0xX;', "<<'", '<<"', '<<`', '&::',
'<<a', '<<V', '<<s', '<<y', '<<_',
# Failed cases 4 chars long.
# This isn't the complete set, as they tend to fail in groups
# of 50 or so, but I've used a representative sample.
'm;;_', 'm[]_', 'm]]_', 'm{}_', 'm}}_', 'm--_', 's[]a', 's[]b',
's[]0', 's[];', 's[]]', 's[]=', 's[].', 's[]_', 's{}]', 's{}?',
's<>s', 's<>-',
'*::0', '*::1', '*:::', '*::\'', '$::0', '$:::', '$::\'',
'@::0', '@::1', '@:::', '&::0', '&::\'', '%:::', '%::\'',
# More-specific single cases thrown up during the heavy testing
'$:::z', '*:::z', "\\\@::'9:!", "} mz}~<<ts", "<\@<<q-r8\n/",
"W<<s`[\n(", "X<<f+X;g(<~\" \n1\n*", "c<<t* 9\ns\n~^{s ",
"<<V=-<<Wt", "[<<g/.<<r>\nV"
);
}
use Test::More tests => 1 + scalar(@FAILURES) * 3;
use Test::NoWarnings;
#####################################################################
# Code/Dump Testing
foreach my $code ( @FAILURES ) {
test_code( $code );
# Verify there are no stale %PARENT entries
my $quotable = quotable($code);
is( scalar(keys %PPI::Element::PARENT), 0,
"\"$quotable\": No stale %PARENT entries" );
%PPI::Element::PARENT = %PPI::Element::PARENT;
}
exit(0);
#####################################################################
# Support Functions
my $failures = 0;
sub test_code {
my $code = shift;
my $quotable = quotable($code);
my $Document = eval {
# $SIG{__WARN__} = sub { croak('Triggered a warning') };
PPI::Document->new(\$code);
};
ok( _INSTANCE($Document, 'PPI::Document'),
"\"$quotable\": Document parses ok" );
unless ( _INSTANCE($Document, 'PPI::Document') ) {
diag( "\"$quotable\": Parsing failed" );
my $short = quotable(quickcheck($code));
diag( "Shortest failing substring: \"$short\"" );
return;
}
# Version of the code for use in error messages
my $joined = $Document->serialize;
my $joined_quotable = quotable($joined);
is( $joined, $code,
"\"$quotable\": Document round-trips ok: \"$joined_quotable\"" );
}
# Find the shortest failing substring of known bad string
sub quickcheck {
my $code = shift;
my $fails = $code;
# $SIG{__WARN__} = sub { croak('Triggered a warning') };
while ( length $fails ) {
chop $code;
my $Document = PPI::Document->new(\$code) or last;
$fails = $code;
}
while ( length $fails ) {
substr( $code, 0, 1, '' );
my $Document = PPI::Document->new(\$code) or return $fails;
$fails = $code;
}
return $fails;
}
sub quotable {
my $quotable = shift;
$quotable =~ s/\\/\\\\/g;
$quotable =~ s/\t/\\t/g;
$quotable =~ s/\n/\\n/g;
$quotable =~ s/\$/\\\$/g;
$quotable =~ s/\@/\\\@/g;
return $quotable;
}
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