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#!/usr/bin/perl
# Exhaustively test all possible Perl programs to a particular length
use strict;
use Carp 'croak';
BEGIN {
no warnings 'once';
$| = 1;
$PPI::XS_DISABLE = 1;
$PPI::Lexer::X_TOKENIZER ||= $ENV{X_TOKENIZER};
}
use vars qw{$MAX_CHARS $ITERATIONS $LENGTH @ALL_CHARS};
BEGIN {
# When distributing, keep this in to verify the test script
# is working correctly, but limit to 2 (maaaaybe 3) so we
# don't slow the install process down too much.
$MAX_CHARS = 2;
$ITERATIONS = 1000;
$LENGTH = 190;
@ALL_CHARS = (
qw{a b c f g m q r s t w x y z V W X 0 1 8 9},
';', '[', ']', '{', '}', '(', ')', '=', '?', '|', '+', '<',
'>', '.', '!', '~', '^', '*', '$', '@', '&', ':', '%', ',',
'\\', '/', '_', ' ', "\n", "\t", '-',
"'", '"', '`', '#', # Comment out to make parsing more intense
);
#my @ALL_CHARS = (
# qw{a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H
# I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9},
# ';', '[', ']', '{', '}', '(', ')', '=', '?', '|', '+', '<', '>', '.',
# '!', '~', '^', '*', '$', '@', '&', ':', '%', '#', ',', "'", '"', '`',
# '\\', '/', '_', ' ', "\n", "\t", '-',
# );
}
#####################################################################
# Prepare
use Test::More tests => ($MAX_CHARS + $ITERATIONS + 3);
use Test::NoWarnings;
use File::Spec::Functions ':ALL';
use Params::Util qw{_INSTANCE};
use PPI;
#####################################################################
# Retest Previous Failures
test_code2( "( {8" );
#####################################################################
# Code/Dump Testing
my $failures = 0;
my $last_index = scalar(@ALL_CHARS) - 1;
LENGTHLOOP:
foreach my $len ( 1 .. $MAX_CHARS ) {
# Initialise the char array and failure count
my $failures = 0;
my @chars = (0) x $len;
# The main test loop
CHARLOOP:
while ( 1 ) {
# Test the current set of chars
my $code = join '', map { $ALL_CHARS[$_] } @chars;
unless ( length($code) == $len ) {
die "Failed sanity check. Error in the code generation mechanism";
}
test_code( $code );
# Increment the last character
$chars[$len - 1]++;
# Cascade the wrapping as needed
foreach ( reverse( 0 .. $len - 1 ) ) {
next CHARLOOP unless $chars[$_] > $last_index;
if ( $_ == 0 ) {
# End of the iterations, move to the next length
last CHARLOOP;
}
# Carry to the previous char
$chars[$_] = 0;
$chars[$_ - 1]++;
}
}
is( $failures, 0, "No tokenizer failures for all $len-length programs" );
}
#####################################################################
# Test a series of random strings
my $count = 0;
foreach my $i ( 1 .. $ITERATIONS ) {
# Generate a random string
my $code = join( '',
map { $ALL_CHARS[$_] }
map { int(rand($last_index) + 1) }
(1 .. $LENGTH)
);
# Test it as normal
test_code2( $code );
# Verify there are no stale %PARENT entries
#my $quotable = quotable($code);
#is( scalar(keys %PPI::Element::PARENT), 0,
# "%PARENT is clean \"$quotable\"" );
}
is( scalar(keys %PPI::Element::PARENT), 0,
'No stale \%PARENT entries at the end of testing' );
%PPI::Element::PARENT = %PPI::Element::PARENT;
#####################################################################
# Support Functions
sub test_code2 {
$failures = 0;
my $string = shift;
my $quotable = quotable($string);
test_code( $string );
is( $failures, 0, "String parses ok \"$quotable\"" );
}
sub test_code {
my $code = shift;
my $Document = eval {
# $SIG{__WARN__} = sub { croak('Triggered a warning') };
PPI::Document->new(\$code);
};
# Version of the code for use in error messages
my $quotable = quotable($code);
unless ( _INSTANCE($Document, 'PPI::Document') ) {
$failures++;
diag( "\"$quotable\": Parser did not return a Document" );
return;
}
my $joined = $Document->serialize;
my $joined_quotable = quotable($joined);
unless ( $joined eq $code ) {
$failures++;
diag( "\"$quotable\": Document round-trips ok" );
diag( "\"$joined_quotable\" (round-trips to)" );
return;
}
}
# 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;
$quotable =~ s/\"/\\\"/g;
return $quotable;
}
exit(0);
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