17 # use Test::NoWarnings, if available
20 if eval { require Test::NoWarnings ; import Test::NoWarnings; 1 };
23 plan tests => 788 + $extra ;
25 use_ok('Compress::Zlib', 2) ;
26 use_ok('Compress::Gzip::Constants') ;
28 use_ok('IO::Compress::Gzip', qw($GzipError)) ;
29 use_ok('IO::Uncompress::Gunzip', qw($GunzipError)) ;
35 # Check the Gzip Header Parameters
36 #========================================
38 my $ThisOS_code = $Compress::Zlib::gzip_os_code;
40 my $name = "test.gz" ;
41 my $lex = new LexFile $name ;
44 title "Check Defaults";
45 # Check Name defaults undef, no name, no comment
46 # and Time can be explicitly set.
48 my $hdr = readHeaderInfo($name, -Time => 1234);
50 is $hdr->{Time}, 1234;
51 ok ! defined $hdr->{Name};
52 is $hdr->{MethodName}, 'Deflated';
53 is $hdr->{ExtraFlags}, 0;
54 is $hdr->{MethodID}, Z_DEFLATED;
55 is $hdr->{OsID}, $ThisOS_code ;
56 ok ! defined $hdr->{Comment} ;
57 ok ! defined $hdr->{ExtraFieldRaw} ;
58 ok ! defined $hdr->{HeaderCRC} ;
59 ok ! $hdr->{isMinimalHeader} ;
64 title "Check name can be different from filename" ;
65 # Check Name can be different from filename
66 # Comment and Extra can be set
67 # Can specify a zero Time
69 my $comment = "This is a Comment" ;
70 my $extra = "A little something extra" ;
71 my $aname = "a new name" ;
72 my $hdr = readHeaderInfo $name,
76 -ExtraField => $extra,
80 ok $hdr->{Name} eq $aname;
81 ok $hdr->{MethodName} eq 'Deflated';
82 ok $hdr->{MethodID} == 8;
83 is $hdr->{ExtraFlags}, 0;
84 ok $hdr->{Comment} eq $comment ;
85 is $hdr->{OsID}, $ThisOS_code ;
86 ok ! $hdr->{isMinimalHeader} ;
87 ok ! defined $hdr->{HeaderCRC} ;
91 title "Check Time defaults to now" ;
93 # Check Time defaults to now
94 # and that can have empty name, comment and extrafield
96 my $hdr = readHeaderInfo $name,
103 ok $hdr->{Time} >= $before ;
104 ok $hdr->{Time} <= $after ;
106 ok defined $hdr->{Name} ;
107 ok $hdr->{Name} eq "";
108 ok defined $hdr->{Comment} ;
109 ok $hdr->{Comment} eq "";
110 ok defined $hdr->{ExtraFieldRaw} ;
111 ok $hdr->{ExtraFieldRaw} eq "";
112 is $hdr->{ExtraFlags}, 0;
114 ok ! $hdr->{isMinimalHeader} ;
115 ok $hdr->{TextFlag} ;
116 ok ! defined $hdr->{HeaderCRC} ;
117 is $hdr->{OsID}, $ThisOS_code ;
122 title "can have null extrafield" ;
125 my $hdr = readHeaderInfo $name,
129 -ExtraField => "\x00";
132 ok $hdr->{Time} >= $before ;
133 ok $hdr->{Time} <= $after ;
134 ok $hdr->{Name} eq "a";
135 ok $hdr->{Comment} eq "b";
136 is $hdr->{ExtraFlags}, 0;
137 ok $hdr->{ExtraFieldRaw} eq "\x00";
138 ok ! $hdr->{isMinimalHeader} ;
139 ok ! $hdr->{TextFlag} ;
140 ok ! defined $hdr->{HeaderCRC} ;
141 is $hdr->{OsID}, $ThisOS_code ;
146 title "can have undef name, comment, time and extrafield" ;
148 my $hdr = readHeaderInfo $name,
151 -ExtraField => undef,
154 ok $hdr->{Time} == 0;
155 ok ! defined $hdr->{Name} ;
156 ok ! defined $hdr->{Comment} ;
157 ok ! defined $hdr->{ExtraFieldRaw} ;
158 ok ! $hdr->{isMinimalHeader} ;
159 ok ! $hdr->{TextFlag} ;
160 ok ! defined $hdr->{HeaderCRC} ;
161 is $hdr->{OsID}, $ThisOS_code ;
166 title "Check crchdr" ;
168 my $hdr = readHeaderInfo $name, -HeaderCRC => 1;
170 ok ! defined $hdr->{Name};
171 is $hdr->{ExtraFlags}, 0;
172 ok ! defined $hdr->{ExtraFieldRaw} ;
173 ok ! defined $hdr->{Comment} ;
174 ok ! $hdr->{isMinimalHeader} ;
175 ok ! $hdr->{TextFlag} ;
176 ok defined $hdr->{HeaderCRC} ;
177 is $hdr->{OsID}, $ThisOS_code ;
181 title "Check ExtraFlags" ;
183 my $hdr = readHeaderInfo $name, -Level => Z_BEST_SPEED;
185 ok ! defined $hdr->{Name};
186 is $hdr->{ExtraFlags}, 2;
187 ok ! defined $hdr->{ExtraFieldRaw} ;
188 ok ! defined $hdr->{Comment} ;
189 ok ! $hdr->{isMinimalHeader} ;
190 ok ! $hdr->{TextFlag} ;
191 ok ! defined $hdr->{HeaderCRC} ;
193 $hdr = readHeaderInfo $name, -Level => Z_BEST_COMPRESSION;
195 ok ! defined $hdr->{Name};
196 is $hdr->{ExtraFlags}, 4;
197 ok ! defined $hdr->{ExtraFieldRaw} ;
198 ok ! defined $hdr->{Comment} ;
199 ok ! $hdr->{isMinimalHeader} ;
200 ok ! $hdr->{TextFlag} ;
201 ok ! defined $hdr->{HeaderCRC} ;
203 $hdr = readHeaderInfo $name, -Level => Z_BEST_COMPRESSION,
206 ok ! defined $hdr->{Name};
207 is $hdr->{ExtraFlags}, 42;
208 ok ! defined $hdr->{ExtraFieldRaw} ;
209 ok ! defined $hdr->{Comment} ;
210 ok ! $hdr->{isMinimalHeader} ;
211 ok ! $hdr->{TextFlag} ;
212 ok ! defined $hdr->{HeaderCRC} ;
220 for my $code ( -1, undef, '', 'fred' )
222 my $code_name = defined $code ? "'$code'" : 'undef';
223 eval { new IO::Compress::Gzip $name, -OS_Code => $code } ;
224 like $@, mkErr("^IO::Compress::Gzip: Parameter 'OS_Code' must be an unsigned int, got $code_name"),
225 " Trap OS Code $code_name";
228 for my $code ( qw( 256 ) )
230 ok ! new IO::Compress::Gzip($name, OS_Code => $code) ;
231 like $GzipError, "/^OS_Code must be between 0 and 255, got '$code'/",
232 " Trap OS Code $code";
235 for my $code ( qw(0 1 12 254 255) )
237 my $hdr = readHeaderInfo $name, OS_Code => $code;
239 is $hdr->{OsID}, $code, " Code is $code" ;
247 title 'Check ExtraField';
250 [1, ['AB' => ''] => [['AB'=>'']] ],
251 [1, {'AB' => ''} => [['AB'=>'']] ],
252 [1, ['AB' => 'Fred'] => [['AB'=>'Fred']] ],
253 [1, {'AB' => 'Fred'} => [['AB'=>'Fred']] ],
254 [1, ['Xx' => '','AB' => 'Fred'] => [['Xx' => ''],['AB'=>'Fred']] ],
255 [1, ['Xx' => '','Xx' => 'Fred'] => [['Xx' => ''],['Xx'=>'Fred']] ],
258 'Xx' => 'Fred'] => [['Xx' => ''],['Xx'=>'Fred'],
261 ['AB' => 'Fred'] ] => [['Xx' => 'a'],['AB'=>'Fred']] ],
264 "\x01\x02" => "\x03"} => [['AB'=>'Fred'],
266 ["\x01\x02"=>"\x03"]] ],
267 [1, ['AB' => 'z' x GZIP_FEXTRA_SUBFIELD_MAX_SIZE] =>
268 [['AB'=>'z' x GZIP_FEXTRA_SUBFIELD_MAX_SIZE]] ],
271 foreach my $test (@tests) {
272 my ($order, $input, $result) = @$test ;
273 ok my $x = new IO::Compress::Gzip $name,
274 -ExtraField => $input,
276 or diag "GzipError is $GzipError" ; ;
277 my $string = "abcd" ;
278 ok $x->write($string) ;
280 is GZreadFile($name), $string ;
282 ok $x = new IO::Uncompress::Gunzip $name,
285 or diag "GunzipError is $GunzipError" ; ;
286 my $hdr = $x->getHeaderInfo();
288 ok ! defined $hdr->{Name};
289 ok ! defined $hdr->{Comment} ;
290 ok ! $hdr->{isMinimalHeader} ;
291 ok ! $hdr->{TextFlag} ;
292 ok defined $hdr->{HeaderCRC} ;
294 ok defined $hdr->{ExtraFieldRaw} ;
295 ok defined $hdr->{ExtraField} ;
297 my $extra = $hdr->{ExtraField} ;
300 eq_array $extra, $result
302 eq_set $extra, $result;
309 title 'Write Invalid ExtraField';
311 my $prefix = 'Error with ExtraField Parameter: ';
313 [ sub{ "abc" } => "Not a scalar, array ref or hash ref"],
314 [ [ "a" ] => "Not even number of elements"],
315 [ [ "a" => "fred" ] => 'SubField ID not two chars long'],
316 [ [ "a\x00" => "fred" ] => 'SubField ID 2nd byte is 0x00'],
317 [ [ [ {}, "abc" ]] => "SubField ID is a reference"],
318 [ [ [ "ab", \1 ]] => "SubField Data is a reference"],
319 [ [ {"a" => "fred"} ] => "Not list of lists"],
320 [ [ ['ab'=>'x'],{"a" => "fred"} ] => "Not list of lists"],
321 [ [ ["aa"] ] => "SubField must have two parts"],
322 [ [ ["aa", "b", "c"] ] => "SubField must have two parts"],
323 [ [ ["ab" => 'x' x (GZIP_FEXTRA_SUBFIELD_MAX_SIZE + 1) ] ]
324 => "SubField Data too long"],
326 [ { 'abc', 1 } => "SubField ID not two chars long"],
327 [ { \1 , "abc" } => "SubField ID not two chars long"],
328 [ { "ab", \1 } => "SubField Data is a reference"],
333 foreach my $test (@tests) {
334 my ($input, $string) = @$test ;
336 my $x = new IO::Compress::Gzip \$buffer, -ExtraField => $input;
338 like $GzipError, "/^$prefix$string/";
348 ["Sub-field truncated",
349 "Error with ExtraField Parameter: FEXTRA Body",
350 "Header Error: Truncated in FEXTRA Body Section",
351 ['a', undef, undef] ],
352 ["Length of field incorrect",
353 "Error with ExtraField Parameter: FEXTRA Body",
354 "Header Error: Truncated in FEXTRA Body Section",
355 ["ab", 255, "abc"] ],
356 ["Length of 2nd field incorrect",
357 "Error with ExtraField Parameter: FEXTRA Body",
358 "Header Error: Truncated in FEXTRA Body Section",
359 ["ab", 3, "abc"], ["de", 7, "x"] ],
360 ["Length of 2nd field incorrect",
361 "Error with ExtraField Parameter: SubField ID 2nd byte is 0x00",
362 "Header Error: Truncated in FEXTRA Body Section",
363 ["a\x00", 3, "abc"], ["de", 7, "x"] ],
366 foreach my $test (@tests)
368 my $name = shift @$test;
369 my $gzip_error = shift @$test;
370 my $gunzip_error = shift @$test;
372 title "Read Corrupt ExtraField - $name" ;
376 for my $field (@$test)
378 my ($id, $len, $data) = @$field;
380 $input .= $id if defined $id ;
381 $input .= pack("v", $len) if defined $len ;
382 $input .= $data if defined $data;
387 my $x = new IO::Compress::Gzip \$buffer, -ExtraField => $input, Strict => 1;
389 ok ! $x, " IO::Compress::Gzip fails";
390 like $GzipError, "/^$gzip_error/", " $name";
392 foreach my $check (0, 1)
394 ok $x = new IO::Compress::Gzip \$buffer, -ExtraField => $input, Strict => 0
395 or diag "GzipError is $GzipError" ; ;
396 my $string = "abcd" ;
399 is anyUncompress(\$buffer), $string ;
401 $x = new IO::Uncompress::Gunzip \$buffer, Strict => 0,
402 ParseExtra => $check;
405 like $GunzipError, "/^$gunzip_error/";
417 title 'Check Minimal';
419 ok my $x = new IO::Compress::Gzip $name, -Minimal => 1;
420 my $string = "abcd" ;
421 ok $x->write($string) ;
423 is GZreadFile($name), $string ;
425 ok $x = new IO::Uncompress::Gunzip $name ;
426 my $hdr = $x->getHeaderInfo();
428 ok $hdr->{Time} == 0;
429 is $hdr->{ExtraFlags}, 0;
430 ok ! defined $hdr->{Name} ;
431 ok ! defined $hdr->{ExtraFieldRaw} ;
432 ok ! defined $hdr->{Comment} ;
433 is $hdr->{OsName}, 'Unknown' ;
434 is $hdr->{MethodName}, "Deflated";
436 ok $hdr->{isMinimalHeader} ;
437 ok ! $hdr->{TextFlag} ;
442 # Check Minimal + no comressed data
443 # This is the smallest possible gzip file (20 bytes)
445 ok my $x = new IO::Compress::Gzip $name, -Minimal => 1;
447 ok GZreadFile($name) eq '' ;
449 ok $x = new IO::Uncompress::Gunzip $name, -Append => 1 ;
453 $status = $x->read($data)
460 my $hdr = $x->getHeaderInfo();
463 ok defined $hdr->{ISIZE} ;
466 ok defined $hdr->{CRC32} ;
470 ok ! defined $hdr->{Name} ;
471 ok ! defined $hdr->{ExtraFieldRaw} ;
472 ok ! defined $hdr->{Comment} ;
473 is $hdr->{OsName}, 'Unknown' ;
474 is $hdr->{MethodName}, "Deflated";
476 ok $hdr->{isMinimalHeader} ;
477 ok ! $hdr->{TextFlag} ;
482 # Header Corruption Tests
489 ok my $x = new IO::Compress::Gzip \$good, -HeaderCRC => 1 ;
490 ok $x->write($string) ;
494 title "Header Corruption - Fingerprint wrong 1st byte" ;
496 substr($buffer, 0, 1) = 'x' ;
498 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
499 ok $GunzipError =~ /Header Error: Bad Magic/;
503 title "Header Corruption - Fingerprint wrong 2nd byte" ;
505 substr($buffer, 1, 1) = "\xFF" ;
507 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
508 ok $GunzipError =~ /Header Error: Bad Magic/;
509 #print "$GunzipError\n";
513 title "Header Corruption - CM not 8";
515 substr($buffer, 2, 1) = 'x' ;
517 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
518 like $GunzipError, '/Header Error: Not Deflate \(CM is \d+\)/';
522 title "Header Corruption - Use of Reserved Flags";
524 substr($buffer, 3, 1) = "\xff";
526 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
527 like $GunzipError, '/Header Error: Use of Reserved Bits in FLG field./';
531 title "Header Corruption - Fail HeaderCRC";
533 substr($buffer, 10, 1) = chr((ord(substr($buffer, 10, 1)) + 1) & 0xFF);
535 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0, Strict => 1
536 or print "# $GunzipError\n";
537 like $GunzipError, '/Header Error: CRC16 mismatch/'
538 #or diag "buffer length " . length($buffer);
539 or hexDump(\$good), hexDump(\$buffer);
544 title "ExtraField max raw size";
546 my $store = "x" x GZIP_FEXTRA_MAX_SIZE ;
547 my $z = new IO::Compress::Gzip(\$x, ExtraField => $store, Strict => 0) ;
548 ok $z, "Created IO::Compress::Gzip object" ;
549 my $gunz = new IO::Uncompress::Gunzip \$x, Strict => 0;
550 ok $gunz, "Created IO::Uncompress::Gunzip object" ;
551 my $hdr = $gunz->getHeaderInfo();
554 is $hdr->{ExtraFieldRaw}, $store ;
558 title "Header Corruption - ExtraField too big";
560 ok ! new IO::Compress::Gzip(\$x,
561 -ExtraField => "x" x (GZIP_FEXTRA_MAX_SIZE + 1)) ;
562 like $GzipError, '/Error with ExtraField Parameter: Too Large/';
566 title "Header Corruption - Create Name with Illegal Chars";
569 ok ! new IO::Compress::Gzip \$x,
570 -Name => "fred\x02" ;
571 like $GzipError, '/Non ISO 8859-1 Character found in Name/';
573 ok my $gz = new IO::Compress::Gzip \$x,
575 -Name => "fred\x02" ;
578 ok ! new IO::Uncompress::Gunzip \$x,
581 like $GunzipError, '/Header Error: Non ISO 8859-1 Character found in Name/';
582 ok my $gunzip = new IO::Uncompress::Gunzip \$x,
585 my $hdr = $gunzip->getHeaderInfo() ;
587 is $hdr->{Name}, "fred\x02";
592 title "Header Corruption - Null Chars in Name";
594 ok ! new IO::Compress::Gzip \$x,
596 like $GzipError, '/Null Character found in Name/';
598 ok ! new IO::Compress::Gzip \$x,
600 like $GzipError, '/Null Character found in Name/';
602 ok my $gz = new IO::Compress::Gzip \$x,
604 -Name => "abc\x00de" ;
606 ok my $gunzip = new IO::Uncompress::Gunzip \$x,
609 my $hdr = $gunzip->getHeaderInfo() ;
611 is $hdr->{Name}, "abc";
616 title "Header Corruption - Create Comment with Illegal Chars";
619 ok ! new IO::Compress::Gzip \$x,
620 -Comment => "fred\x02" ;
621 like $GzipError, '/Non ISO 8859-1 Character found in Comment/';
623 ok my $gz = new IO::Compress::Gzip \$x,
625 -Comment => "fred\x02" ;
628 ok ! new IO::Uncompress::Gunzip \$x, Strict => 1;
630 like $GunzipError, '/Header Error: Non ISO 8859-1 Character found in Comment/';
631 ok my $gunzip = new IO::Uncompress::Gunzip \$x, Strict => 0;
633 my $hdr = $gunzip->getHeaderInfo() ;
635 is $hdr->{Comment}, "fred\x02";
640 title "Header Corruption - Null Char in Comment";
642 ok ! new IO::Compress::Gzip \$x,
644 like $GzipError, '/Null Character found in Comment/';
646 ok ! new IO::Compress::Gzip \$x,
647 -Comment => "abc\x00" ;
648 like $GzipError, '/Null Character found in Comment/';
650 ok my $gz = new IO::Compress::Gzip \$x,
652 -Comment => "abc\x00de" ;
654 ok my $gunzip = new IO::Uncompress::Gunzip \$x,
657 my $hdr = $gunzip->getHeaderInfo() ;
659 is $hdr->{Comment}, "abc";
664 for my $index ( GZIP_MIN_HEADER_SIZE + 1 .. GZIP_MIN_HEADER_SIZE + GZIP_FEXTRA_HEADER_SIZE + 1)
666 title "Header Corruption - Truncated in Extra";
672 ok my $x = new IO::Compress::Gzip \$truncated, -HeaderCRC => 1, Strict => 0,
673 -ExtraField => "hello" x 10 ;
674 ok $x->write($string) ;
677 substr($truncated, $index) = '' ;
678 #my $name = "trunc.gz" ;
679 #my $lex = new LexFile $name ;
680 #writeFile($name, $truncated) ;
682 #my $g = new IO::Uncompress::Gunzip $name, -Transparent => 0;
683 my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
687 like($GunzipError, '/^Header Error: Truncated in FEXTRA/');
694 for my $index ( GZIP_MIN_HEADER_SIZE .. GZIP_MIN_HEADER_SIZE + length($Name) -1)
696 title "Header Corruption - Truncated in Name";
702 ok my $x = new IO::Compress::Gzip \$truncated, -Name => $Name;
703 ok $x->write($string) ;
706 substr($truncated, $index) = '' ;
708 my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
712 like $GunzipError, '/^Header Error: Truncated in FNAME Section/';
716 my $Comment = "comment" ;
717 for my $index ( GZIP_MIN_HEADER_SIZE .. GZIP_MIN_HEADER_SIZE + length($Comment) -1)
719 title "Header Corruption - Truncated in Comment";
725 ok my $x = new IO::Compress::Gzip \$truncated, -Comment => $Comment;
726 ok $x->write($string) ;
729 substr($truncated, $index) = '' ;
730 #my $name = "trunc.gz" ;
731 #my $lex = new LexFile $name ;
732 #writeFile($name, $truncated) ;
734 #my $g = new IO::Uncompress::Gunzip $name, -Transparent => 0;
735 my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
739 like $GunzipError, '/^Header Error: Truncated in FCOMMENT Section/';
743 for my $index ( GZIP_MIN_HEADER_SIZE .. GZIP_MIN_HEADER_SIZE + GZIP_FHCRC_SIZE -1)
745 title "Header Corruption - Truncated in CRC";
751 ok my $x = new IO::Compress::Gzip \$truncated, -HeaderCRC => 1;
752 ok $x->write($string) ;
755 substr($truncated, $index) = '' ;
756 my $name = "trunc.gz" ;
757 my $lex = new LexFile $name ;
758 writeFile($name, $truncated) ;
760 my $g = new IO::Uncompress::Gunzip $name, -Transparent => 0;
761 #my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
765 like $GunzipError, '/^Header Error: Truncated in FHCRC Section/';
771 # Trailer Corruption tests
779 ok my $x = new IO::Compress::Gzip \$good ;
780 ok $x->write($string) ;
784 writeFile($name, $good) ;
785 ok my $gunz = new IO::Uncompress::Gunzip $name,
788 1 while $gunz->read($uncomp) > 0 ;
790 ok $uncomp eq $string
791 or print "# got [$uncomp] wanted [$string]\n";;
793 foreach my $trim (-8 .. -1)
795 my $got = $trim + 8 ;
796 title "Trailer Corruption - Trailer truncated to $got bytes" ;
798 my $expected_trailing = substr($good, -8, 8) ;
799 substr($expected_trailing, $trim) = '';
801 substr($buffer, $trim) = '';
802 writeFile($name, $buffer) ;
804 foreach my $strict (0, 1)
806 ok my $gunz = new IO::Uncompress::Gunzip $name, -Strict => $strict ;
810 ok $gunz->read($uncomp) < 0 ;
811 like $GunzipError, "/Trailer Error: trailer truncated. Expected 8 bytes, got $got/";
815 ok $gunz->read($uncomp) > 0 ;
817 my $expected = substr($buffer, - $got);
818 is ${ $gunz->trailingData() }, $expected_trailing;
821 ok $uncomp eq $string;
828 title "Trailer Corruption - Length Wrong, CRC Correct" ;
830 my $actual_len = unpack("V", substr($buffer, -4, 4));
831 substr($buffer, -4, 4) = pack('V', $actual_len + 1);
832 writeFile($name, $buffer) ;
834 foreach my $strict (0, 1)
836 ok my $gunz = new IO::Uncompress::Gunzip $name,
841 ok $gunz->read($uncomp) < 0 ;
842 my $got_len = $actual_len + 1;
843 like $GunzipError, "/Trailer Error: ISIZE mismatch. Got $got_len, expected $actual_len/";
847 ok $gunz->read($uncomp) > 0 ;
849 #is $gunz->trailingData(), substr($buffer, - $got) ;
851 ok ! ${ $gunz->trailingData() } ;
853 ok $uncomp eq $string;
860 title "Trailer Corruption - Length Correct, CRC Wrong" ;
862 my $actual_crc = unpack("V", substr($buffer, -8, 4));
863 substr($buffer, -8, 4) = pack('V', $actual_crc+1);
864 writeFile($name, $buffer) ;
866 foreach my $strict (0, 1)
868 ok my $gunz = new IO::Uncompress::Gunzip $name,
873 ok $gunz->read($uncomp) < 0 ;
874 like $GunzipError, '/Trailer Error: CRC mismatch/';
878 ok $gunz->read($uncomp) > 0 ;
881 ok ! ${ $gunz->trailingData() } ;
883 ok $uncomp eq $string;
890 title "Trailer Corruption - Length Wrong, CRC Wrong" ;
892 my $actual_len = unpack("V", substr($buffer, -4, 4));
893 my $actual_crc = unpack("V", substr($buffer, -8, 4));
894 substr($buffer, -4, 4) = pack('V', $actual_len+1);
895 substr($buffer, -8, 4) = pack('V', $actual_crc+1);
896 writeFile($name, $buffer) ;
898 foreach my $strict (0, 1)
900 ok my $gunz = new IO::Uncompress::Gunzip $name,
905 ok $gunz->read($uncomp) < 0 ;
906 like $GunzipError, '/Trailer Error: CRC mismatch/';
910 ok $gunz->read($uncomp) > 0 ;
914 ok $uncomp eq $string;