1#!/usr/bin/perl
2
3use strict;
4use warnings;
5
6#
7# Unit tests of _twrite function
8#
9# _twrite($self, $data, $pos, $len)
10#
11# 't' here is for 'tail'.  This writes $data at absolute position $pos
12# in the file, overwriting exactly $len of the bytes at that position.
13# Everything else is moved down or up, dependong on whether
14# length($data) > $len or length($data) < $len.
15# $len == 0 is a pure insert; $len == length($data) is a simple overwrite.
16#
17
18my $file = "tf26-$$.txt";
19
20print "1..181\n";
21
22my $N = 1;
23use Tie::File;
24print "ok $N\n"; $N++;
25
26$: = Tie::File::_default_recsep();
27
28# (2) Peter Scott sent this one.  It fails in 0.51 and works in 0.90
29# <4.3.2.7.2.20020331102819.00b913d0@shell2.webquarry.com>
30#
31# The problem was premature termination in the inner loop
32# because you had $more_data scoped *inside* the block instead of outside.
33# 20020331
34open F, '>', $file or die "Couldn't open $file: $!";
35binmode F;
36for (1..100) {
37  print F "$_ ", 'a'x150, $: ;
38}
39close F;
40# The file is now 15292 characters long on Unix, 15392 on Win32
41die -s $file unless -s $file == 15292 + 100 * length($:);
42
43tie my @lines, 'Tie::File', $file or die $!;
44push @lines, "1001 ".('a' x 100);
45splice @lines, 0, 1;
46untie @lines;
47
48my $s = -s $file;
49my $x = 15292 - 152 + 105 + 100*length($:);
50print $s == $x
51  ? "ok $N\n" : "not ok $N # expected $x, got $s\n";
52$N++;
53
54my @subtests = qw(x <x x> x><x <x> <x><x x><x> <x><x> <x><x><x> 0);
55
56# (3-73) These were generated by 'gentests.pl' to cover all possible cases
57# (I hope)
58# Legend:
59#         x: data is entirely contained within one block
60#        x>: data runs from the middle to the end of the block
61#        <x: data runs from the start to the middle of the block
62#       <x>: data occupies precisely one block
63#      x><x: data overlaps one block boundary
64#     <x><x: data runs from the start of one block into the middle of the next
65#     x><x>: data runs from the middle of one block to the end of the next
66#    <x><x>: data occupies two blocks exactly
67# <x><x><x>: data occupies three blocks exactly
68#         0: data is null
69#
70# For each possible alignment of the old and new data, we investigate
71# up to three situations: old data is shorter, old and new data are the
72# same length, and new data is shorter.
73#
74# try($pos, $old, $new) means to run a test where the data starts at
75# position $pos, the old data has length $old,
76# and the new data has length $new.
77try( 9659,  6635,  6691);  # old=x        , new=x        ; old < new
78try( 8605,  2394,  2394);  # old=x        , new=x        ; old = new
79try( 9768,  1361,   664);  # old=x        , new=x        ; old > new
80try( 9955,  6429,  6429);  # old=x>       , new=x        ; old = new
81try(10550,  5834,  4123);  # old=x>       , new=x        ; old > new
82try(14580,  6158,   851);  # old=x><x     , new=x        ; old > new
83try(13442, 11134,  1572);  # old=x><x>    , new=x        ; old > new
84try( 8394,     0,  5742);  # old=0        , new=x        ; old < new
85try( 8192,  2819,  6738);  # old=<x       , new=<x       ; old < new
86try( 8192,   514,   514);  # old=<x       , new=<x       ; old = new
87try( 8192,  2196,   858);  # old=<x       , new=<x       ; old > new
88try( 8192,  8192,  8192);  # old=<x>      , new=<x       ; old = new
89try( 8192,  8192,  1290);  # old=<x>      , new=<x       ; old > new
90try( 8192, 10575,  6644);  # old=<x><x    , new=<x       ; old > new
91try( 8192, 16384,  5616);  # old=<x><x>   , new=<x       ; old > new
92try( 8192, 24576,  6253);  # old=<x><x><x>, new=<x       ; old > new
93try( 8192,     0,  6870);  # old=0        , new=<x       ; old < new
94try( 8478,  6259,  7906);  # old=x        , new=x>       ; old < new
95try( 9965,  6419,  6419);  # old=x>       , new=x>       ; old = new
96try(16059,  6102,   325);  # old=x><x     , new=x>       ; old > new
97try( 9503, 15073,  6881);  # old=x><x>    , new=x>       ; old > new
98try( 9759,     0,  6625);  # old=0        , new=x>       ; old < new
99try( 8525,  2081,  8534);  # old=x        , new=x><x     ; old < new
100try(15550,   834,  1428);  # old=x>       , new=x><x     ; old < new
101try(14966,  1668,  3479);  # old=x><x     , new=x><x     ; old < new
102try(16316,  1605,  1605);  # old=x><x     , new=x><x     ; old = new
103try(16093,  4074,   993);  # old=x><x     , new=x><x     ; old > new
104try(14739,  9837,  9837);  # old=x><x>    , new=x><x     ; old = new
105try(14071, 10505,  7344);  # old=x><x>    , new=x><x     ; old > new
106try(12602,     0,  8354);  # old=0        , new=x><x     ; old < new
107try( 8192,  2767,  8192);  # old=<x       , new=<x>      ; old < new
108try( 8192,  8192,  8192);  # old=<x>      , new=<x>      ; old = new
109try( 8192, 14817,  8192);  # old=<x><x    , new=<x>      ; old > new
110try( 8192, 16384,  8192);  # old=<x><x>   , new=<x>      ; old > new
111try( 8192, 24576,  8192);  # old=<x><x><x>, new=<x>      ; old > new
112try( 8192,     0,  8192);  # old=0        , new=<x>      ; old < new
113try( 8192,  6532, 10882);  # old=<x       , new=<x><x    ; old < new
114try( 8192,  8192, 16044);  # old=<x>      , new=<x><x    ; old < new
115try( 8192,  9555, 11020);  # old=<x><x    , new=<x><x    ; old < new
116try( 8192,  9001,  9001);  # old=<x><x    , new=<x><x    ; old = new
117try( 8192, 11760, 10274);  # old=<x><x    , new=<x><x    ; old > new
118try( 8192, 16384, 10781);  # old=<x><x>   , new=<x><x    ; old > new
119try( 8192, 24576,  9284);  # old=<x><x><x>, new=<x><x    ; old > new
120try( 8192,     0, 12488);  # old=0        , new=<x><x    ; old < new
121try( 8222,  6385, 16354);  # old=x        , new=x><x>    ; old < new
122try(13500,  2884, 11076);  # old=x>       , new=x><x>    ; old < new
123try(14069,  4334, 10507);  # old=x><x     , new=x><x>    ; old < new
124try(14761,  9815,  9815);  # old=x><x>    , new=x><x>    ; old = new
125try(10469,     0, 14107);  # old=0        , new=x><x>    ; old < new
126try( 8192,  4181, 16384);  # old=<x       , new=<x><x>   ; old < new
127try( 8192,  8192, 16384);  # old=<x>      , new=<x><x>   ; old < new
128try( 8192, 12087, 16384);  # old=<x><x    , new=<x><x>   ; old < new
129try( 8192, 16384, 16384);  # old=<x><x>   , new=<x><x>   ; old = new
130try( 8192, 24576, 16384);  # old=<x><x><x>, new=<x><x>   ; old > new
131try( 8192,     0, 16384);  # old=0        , new=<x><x>   ; old < new
132try( 8192,  4968, 24576);  # old=<x       , new=<x><x><x>; old < new
133try( 8192,  8192, 24576);  # old=<x>      , new=<x><x><x>; old < new
134try( 8192, 14163, 24576);  # old=<x><x    , new=<x><x><x>; old < new
135try( 8192, 16384, 24576);  # old=<x><x>   , new=<x><x><x>; old < new
136try( 8192, 24576, 24576);  # old=<x><x><x>, new=<x><x><x>; old = new
137try( 8192,     0, 24576);  # old=0        , new=<x><x><x>; old < new
138try( 8771,   776,     0);  # old=x        , new=0        ; old > new
139try( 8192,  2813,     0);  # old=<x       , new=0        ; old > new
140try(13945,  2439,     0);  # old=x>       , new=0        ; old > new
141try(14493,  6090,     0);  # old=x><x     , new=0        ; old > new
142try( 8192,  8192,     0);  # old=<x>      , new=0        ; old > new
143try( 8192, 10030,     0);  # old=<x><x    , new=0        ; old > new
144try(14983,  9593,     0);  # old=x><x>    , new=0        ; old > new
145try( 8192, 16384,     0);  # old=<x><x>   , new=0        ; old > new
146try( 8192, 24576,     0);  # old=<x><x><x>, new=0        ; old > new
147try(10489,     0,     0);  # old=0        , new=0        ; old = new
148
149# (74-114)
150# These tests all take place at the start of the file
151try(    0,   771,  1593);  # old=<x       , new=<x       ; old < new
152try(    0,  4868,  4868);  # old=<x       , new=<x       ; old = new
153try(    0,   147,   118);  # old=<x       , new=<x       ; old > new
154try(    0,  8192,  8192);  # old=<x>      , new=<x       ; old = new
155try(    0,  8192,  4574);  # old=<x>      , new=<x       ; old > new
156try(    0, 11891,  1917);  # old=<x><x    , new=<x       ; old > new
157try(    0, 16384,  5155);  # old=<x><x>   , new=<x       ; old > new
158try(    0, 24576,  2953);  # old=<x><x><x>, new=<x       ; old > new
159try(    0,     0,  1317);  # old=0        , new=<x       ; old < new
160try(    0,  5609,  8192);  # old=<x       , new=<x>      ; old < new
161try(    0,  8192,  8192);  # old=<x>      , new=<x>      ; old = new
162try(    0, 11083,  8192);  # old=<x><x    , new=<x>      ; old > new
163try(    0, 16384,  8192);  # old=<x><x>   , new=<x>      ; old > new
164try(    0, 24576,  8192);  # old=<x><x><x>, new=<x>      ; old > new
165try(    0,     0,  8192);  # old=0        , new=<x>      ; old < new
166try(    0,  6265,  9991);  # old=<x       , new=<x><x    ; old < new
167try(    0,  8192, 16119);  # old=<x>      , new=<x><x    ; old < new
168try(    0, 10218, 11888);  # old=<x><x    , new=<x><x    ; old < new
169try(    0, 14126, 14126);  # old=<x><x    , new=<x><x    ; old = new
170try(    0, 12002,  9034);  # old=<x><x    , new=<x><x    ; old > new
171try(    0, 16384, 13258);  # old=<x><x>   , new=<x><x    ; old > new
172try(    0, 24576, 14367);  # old=<x><x><x>, new=<x><x    ; old > new
173try(    0,     0, 10881);  # old=0        , new=<x><x    ; old < new
174try(    0,  6448, 16384);  # old=<x       , new=<x><x>   ; old < new
175try(    0,  8192, 16384);  # old=<x>      , new=<x><x>   ; old < new
176try(    0, 15082, 16384);  # old=<x><x    , new=<x><x>   ; old < new
177try(    0, 16384, 16384);  # old=<x><x>   , new=<x><x>   ; old = new
178try(    0, 24576, 16384);  # old=<x><x><x>, new=<x><x>   ; old > new
179try(    0,     0, 16384);  # old=0        , new=<x><x>   ; old < new
180try(    0,  2421, 24576);  # old=<x       , new=<x><x><x>; old < new
181try(    0,  8192, 24576);  # old=<x>      , new=<x><x><x>; old < new
182try(    0, 11655, 24576);  # old=<x><x    , new=<x><x><x>; old < new
183try(    0, 16384, 24576);  # old=<x><x>   , new=<x><x><x>; old < new
184try(    0, 24576, 24576);  # old=<x><x><x>, new=<x><x><x>; old = new
185try(    0,     0, 24576);  # old=0        , new=<x><x><x>; old < new
186try(    0,  6530,     0);  # old=<x       , new=0        ; old > new
187try(    0,  8192,     0);  # old=<x>      , new=0        ; old > new
188try(    0, 14707,     0);  # old=<x><x    , new=0        ; old > new
189try(    0, 16384,     0);  # old=<x><x>   , new=0        ; old > new
190try(    0, 24576,     0);  # old=<x><x><x>, new=0        ; old > new
191try(    0,     0,     0);  # old=0        , new=0        ; old = new
192
193# (115-141)
194# These tests all take place at the end of the file
195my $FLEN = 40960;  # Force the file to be exactly 40960 bytes long
196try(32768,  8192,  8192);  # old=<x>      , new=<x       ; old = new
197try(32768,  8192,  4026);  # old=<x>      , new=<x       ; old > new
198try(24576, 16384,  1917);  # old=<x><x>   , new=<x       ; old > new
199try(16384, 24576,  3818);  # old=<x><x><x>, new=<x       ; old > new
200try(40960,     0,  2779);  # old=0        , new=<x       ; old < new
201try(32768,  8192,  8192);  # old=<x>      , new=<x>      ; old = new
202try(24576, 16384,  8192);  # old=<x><x>   , new=<x>      ; old > new
203try(16384, 24576,  8192);  # old=<x><x><x>, new=<x>      ; old > new
204try(40960,     0,  8192);  # old=0        , new=<x>      ; old < new
205try(32768,  8192, 10724);  # old=<x>      , new=<x><x    ; old < new
206try(24576, 16384, 12221);  # old=<x><x>   , new=<x><x    ; old > new
207try(16384, 24576, 15030);  # old=<x><x><x>, new=<x><x    ; old > new
208try(40960,     0, 11752);  # old=0        , new=<x><x    ; old < new
209try(32768,  8192, 16384);  # old=<x>      , new=<x><x>   ; old < new
210try(24576, 16384, 16384);  # old=<x><x>   , new=<x><x>   ; old = new
211try(16384, 24576, 16384);  # old=<x><x><x>, new=<x><x>   ; old > new
212try(40960,     0, 16384);  # old=0        , new=<x><x>   ; old < new
213try(32768,  8192, 24576);  # old=<x>      , new=<x><x><x>; old < new
214try(24576, 16384, 24576);  # old=<x><x>   , new=<x><x><x>; old < new
215try(16384, 24576, 24576);  # old=<x><x><x>, new=<x><x><x>; old = new
216try(40960,     0, 24576);  # old=0        , new=<x><x><x>; old < new
217try(35973,  4987,     0);  # old=x>       , new=0        ; old > new
218try(32768,  8192,     0);  # old=<x>      , new=0        ; old > new
219try(29932, 11028,     0);  # old=x><x>    , new=0        ; old > new
220try(24576, 16384,     0);  # old=<x><x>   , new=0        ; old > new
221try(16384, 24576,     0);  # old=<x><x><x>, new=0        ; old > new
222try(40960,     0,     0);  # old=0        , new=0        ; old = new
223
224# (142-181)
225# These tests all take place at the end of the file
226$FLEN = 42000;  # Force the file to be exactly 42000 bytes long
227try(41275,   725,  4059);  # old=x        , new=x        ; old < new
228try(41683,   317,   317);  # old=x        , new=x        ; old = new
229try(41225,   775,   405);  # old=x        , new=x        ; old > new
230try(35709,  6291,   284);  # old=x><x     , new=x        ; old > new
231try(42000,     0,  2434);  # old=0        , new=x        ; old < new
232try(40960,  1040,  1608);  # old=<x       , new=<x       ; old < new
233try(40960,  1040,  1040);  # old=<x       , new=<x       ; old = new
234try(40960,  1040,   378);  # old=<x       , new=<x       ; old > new
235try(32768,  9232,  5604);  # old=<x><x    , new=<x       ; old > new
236try(42000,     0,  6637);  # old=0        , new=<x       ; old < new
237try(41022,   978,  8130);  # old=x        , new=x>       ; old < new
238try(39994,  2006,   966);  # old=x><x     , new=x>       ; old > new
239try(42000,     0,  7152);  # old=0        , new=x>       ; old < new
240try(41613,   387, 10601);  # old=x        , new=x><x     ; old < new
241try(38460,  3540,  3938);  # old=x><x     , new=x><x     ; old < new
242try(36725,  5275,  5275);  # old=x><x     , new=x><x     ; old = new
243try(37990,  4010,  3199);  # old=x><x     , new=x><x     ; old > new
244try(42000,     0,  9189);  # old=0        , new=x><x     ; old < new
245try(40960,  1040,  8192);  # old=<x       , new=<x>      ; old < new
246try(32768,  9232,  8192);  # old=<x><x    , new=<x>      ; old > new
247try(42000,     0,  8192);  # old=0        , new=<x>      ; old < new
248try(40960,  1040, 11778);  # old=<x       , new=<x><x    ; old < new
249try(32768,  9232, 13792);  # old=<x><x    , new=<x><x    ; old < new
250try(32768,  9232,  9232);  # old=<x><x    , new=<x><x    ; old = new
251try(32768,  9232,  8795);  # old=<x><x    , new=<x><x    ; old > new
252try(42000,     0,  8578);  # old=0        , new=<x><x    ; old < new
253try(41531,   469, 15813);  # old=x        , new=x><x>    ; old < new
254try(39618,  2382,  9534);  # old=x><x     , new=x><x>    ; old < new
255try(42000,     0, 15344);  # old=0        , new=x><x>    ; old < new
256try(40960,  1040, 16384);  # old=<x       , new=<x><x>   ; old < new
257try(32768,  9232, 16384);  # old=<x><x    , new=<x><x>   ; old < new
258try(42000,     0, 16384);  # old=0        , new=<x><x>   ; old < new
259try(40960,  1040, 24576);  # old=<x       , new=<x><x><x>; old < new
260try(32768,  9232, 24576);  # old=<x><x    , new=<x><x><x>; old < new
261try(42000,     0, 24576);  # old=0        , new=<x><x><x>; old < new
262try(41500,   500,     0);  # old=x        , new=0        ; old > new
263try(40960,  1040,     0);  # old=<x       , new=0        ; old > new
264try(35272,  6728,     0);  # old=x><x     , new=0        ; old > new
265try(32768,  9232,     0);  # old=<x><x    , new=0        ; old > new
266try(42000,     0,     0);  # old=0        , new=0        ; old = new
267
268sub try {
269  my ($pos, $len, $newlen) = @_;
270  open F, '>', $file or die "Couldn't open file $file: $!";
271  binmode F;
272
273  # The record has exactly 17 characters.  This will help ensure that
274  # even if _twrite screws up, the data doesn't coincidentally
275  # look good because the remainder accidentally lines up.
276  my $d = substr("0123456789abcdef$:", -17);
277  my $recs = defined($FLEN) ?
278    int($FLEN/length($d))+1 : # enough to make up at least $FLEN
279    int(8192*5/length($d))+1; # at least 5 blocks' worth
280  my $oldfile = $d x $recs;
281  my $flen = defined($FLEN) ? $FLEN : $recs * 17;
282  substr($oldfile, $FLEN) = "" if defined $FLEN;  # truncate
283  print F $oldfile;
284  close F;
285
286  die "wrong length!" unless -s $file == $flen;
287
288  my $newdata = "-" x $newlen;
289  my $expected = $oldfile;
290  substr($expected, $pos, $len) = $newdata;
291
292  my $o = tie my @lines, 'Tie::File', $file or die $!;
293  $o->_twrite($newdata, $pos, $len);
294  undef $o; untie @lines;
295
296  open F, '<', $file or die "Couldn't open file $file: $!";
297  binmode F;
298  my $actual;
299  { local $/;
300    $actual = <F>;
301  }
302  close F;
303
304  my ($alen, $xlen) = (length $actual, length $expected);
305  unless ($alen == $xlen) {
306    print "# try(@_) expected file length $xlen, actual $alen!\n";
307  }
308  print $actual eq $expected ? "ok $N\n" : "not ok $N\n";
309  $N++;
310}
311
312
313END {
314  1 while unlink $file;
315}
316
317