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Benchmark.t: ignore sys CPU time
[perl5.git] / lib / Benchmark.t
CommitLineData
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1#!./perl -w
2
3BEGIN {
4 chdir 't' if -d 't';
53aa2791 5 @INC = ('../lib');
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6}
7
8use warnings;
9use strict;
10use vars qw($foo $bar $baz $ballast);
d684718b 11use Test::More tests => 196;
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12
13use Benchmark qw(:all);
14
ab43e786 15my $delta = 0.4;
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16
17# Some timing ballast
18sub fib {
19 my $n = shift;
20 return $n if $n < 2;
21 fib($n-1) + fib($n-2);
22}
23$ballast = 15;
24
53aa2791 25my $All_Pattern =
0e74ff8e 26 qr/(\d+) +wallclock secs? +\( *(-?\d+\.\d\d) +usr +(-?\d+\.\d\d) +sys +\+ +(-?\d+\.\d\d) +cusr +(-?\d+\.\d\d) +csys += +(-?\d+\.\d\d) +CPU\)/;
53aa2791 27my $Noc_Pattern =
0e74ff8e 28 qr/(\d+) +wallclock secs? +\( *(-?\d+\.\d\d) +usr +\+ +(-?\d+\.\d\d) +sys += +(-?\d+\.\d\d) +CPU\)/;
53aa2791 29my $Nop_Pattern =
0e74ff8e 30 qr/(\d+) +wallclock secs? +\( *(-?\d+\.\d\d) +cusr +\+ +(-?\d+\.\d\d) +csys += +\d+\.\d\d +CPU\)/;
98dc9551 31# Please don't trust the matching parentheses to be useful in this :-)
53aa2791 32my $Default_Pattern = qr/$All_Pattern|$Noc_Pattern/;
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33
34my $t0 = new Benchmark;
35isa_ok ($t0, 'Benchmark', "Ensure we can create a benchmark object");
36
37# We use the benchmark object once we've done some work:
38
39isa_ok(timeit(5, sub {++$foo}), 'Benchmark', "timeit CODEREF");
40is ($foo, 5, "benchmarked code was run 5 times");
41
42isa_ok(timeit(5, '++$bar'), 'Benchmark', "timeit eval");
43is ($bar, 5, "benchmarked code was run 5 times");
44
f265d4df
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45# is coderef called with spurious arguments?
46timeit( 1, sub { $foo = @_ });
47is ($foo, 0, "benchmarked code called without arguments");
48
49
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50print "# Burning CPU to benchmark things will take time...\n";
51
52
53
54# We need to do something fairly slow in the coderef.
55# Same coderef. Same place in memory.
56my $coderef = sub {$baz += fib($ballast)};
57
58# The default is three.
59$baz = 0;
60my $threesecs = countit(0, $coderef);
61isa_ok($threesecs, 'Benchmark', "countit 0, CODEREF");
62isnt ($baz, 0, "benchmarked code was run");
63my $in_threesecs = $threesecs->iters;
d684718b 64print "# in_threesecs=$in_threesecs iterations\n";
0e74ff8e 65ok ($in_threesecs > 0, "iters returned positive iterations");
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66my $cpu3 = $threesecs->[1]; # user
67my $sys3 = $threesecs->[2]; # sys
68cmp_ok($cpu3+$sys3, '>=', 3.0, "3s cpu3 is at least 3s");
bb6c6e4b
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69my $in_threesecs_adj = $in_threesecs;
70$in_threesecs_adj *= (3/$cpu3); # adjust because may not have run for exactly 3s
71print "# in_threesecs_adj=$in_threesecs_adj adjusted iterations\n";
0e74ff8e 72
58747404 73my $estimate = int (100 * $in_threesecs_adj / 3) / 100;
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74print "# from the 3 second run estimate $estimate iterations in 1 second...\n";
75$baz = 0;
76my $onesec = countit(1, $coderef);
77isa_ok($onesec, 'Benchmark', "countit 1, CODEREF");
78isnt ($baz, 0, "benchmarked code was run");
79my $in_onesec = $onesec->iters;
d684718b 80print "# in_onesec=$in_onesec iterations\n";
0e74ff8e 81ok ($in_onesec > 0, "iters returned positive iterations");
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82my $cpu1 = $onesec->[1]; # user
83my $sys1 = $onesec->[2]; # sys
84cmp_ok($cpu1+$sys1, '>=', 1.0, "is cpu1 is at least 1s");
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85my $in_onesec_adj = $in_onesec;
86$in_onesec_adj *= (1/$cpu1); # adjust because may not have run for exactly 1s
87print "# in_onesec_adj=$in_onesec_adj adjusted iterations\n";
0e74ff8e 88
ab43e786 89{
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90 my $difference = $in_onesec_adj - $estimate;
91 my $actual = abs ($difference / $in_onesec_adj);
92 cmp_ok($actual, '<=', $delta, "is $in_onesec_adj within $delta of estimate ($estimate)")
93 or do {
94 diag(" in_threesecs = $in_threesecs");
95 diag(" in_threesecs_adj = $in_threesecs_adj");
96 diag(" cpu3 = $cpu3");
0d66b88d 97 diag(" sys3 = $sys3");
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98 diag(" estimate = $estimate");
99 diag(" in_onesec = $in_onesec");
100 diag(" in_onesec_adj = $in_onesec_adj");
101 diag(" cpu1 = $cpu1");
0d66b88d 102 diag(" sys1 = $sys1");
bb6c6e4b 103 };
ab43e786 104}
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105
106# I found that the eval'ed version was 3 times faster than the coderef.
107# (now it has a different ballast value)
108$baz = 0;
109my $again = countit(1, '$baz += fib($ballast)');
110isa_ok($onesec, 'Benchmark', "countit 1, eval");
111isnt ($baz, 0, "benchmarked code was run");
112my $in_again = $again->iters;
113print "# $in_again iterations\n";
114ok ($in_again > 0, "iters returned positive iterations");
115
116
117my $t1 = new Benchmark;
118isa_ok ($t1, 'Benchmark', "Create another benchmark object now we're finished");
119
120my $diff = timediff ($t1, $t0);
121isa_ok ($diff, 'Benchmark', "Get the time difference");
122isa_ok (timesum ($t0, $t1), 'Benchmark', "check timesum");
123
124my $default = timestr ($diff);
125isnt ($default, '', 'timestr ($diff)');
126my $auto = timestr ($diff, 'auto');
127is ($auto, $default, 'timestr ($diff, "auto") matches timestr ($diff)');
128
129{
130 my $all = timestr ($diff, 'all');
53aa2791 131 like ($all, $All_Pattern, 'timestr ($diff, "all")');
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132 print "# $all\n";
133
53aa2791 134 my ($wallclock, $usr, $sys, $cusr, $csys, $cpu) = $all =~ $All_Pattern;
0e74ff8e 135
98dc9551 136 is (timestr ($diff, 'none'), '', "none suppresses output");
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137
138 my $noc = timestr ($diff, 'noc');
bd9f0ebf 139 like ($noc, qr/$wallclock +wallclock secs? +\( *$usr +usr +\+ +$sys +sys += +\d+\.\d\d +CPU\)/, 'timestr ($diff, "noc")');
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140
141 my $nop = timestr ($diff, 'nop');
142 like ($nop, qr/$wallclock +wallclock secs? +\( *$cusr +cusr +\+ +$csys +csys += +\d+\.\d\d +CPU\)/, 'timestr ($diff, "nop")');
143
144 if ($auto eq $noc) {
145 pass ('"auto" is "noc"');
146 } else {
147 is ($auto, $all, '"auto" isn\'t "noc", so should be eq to "all"');
148 }
149
150 like (timestr ($diff, 'all', 'E'),
151 qr/(\d+) +wallclock secs? +\( *\d\.\d+E[-+]?\d\d\d? +usr +\d\.\d+E[-+]?\d\d\d? +sys +\+ +\d\.\d+E[-+]?\d\d\d? +cusr +\d\.\d+E[-+]?\d\d\d? +csys += +\d\.\d+E[-+]?\d\d\d? +CPU\)/, 'timestr ($diff, "all", "E") [sprintf format of "E"]');
152}
153
154my $out = tie *OUT, 'TieOut';
155
156my $iterations = 3;
157
158$foo = 0;
159select(OUT);
160my $got = timethis($iterations, sub {++$foo});
161select(STDOUT);
162isa_ok($got, 'Benchmark', "timethis CODEREF");
163is ($foo, $iterations, "benchmarked code was run $iterations times");
164
165$got = $out->read();
166like ($got, qr/^timethis $iterations/, 'default title');
53aa2791 167like ($got, $Default_Pattern, 'default format is all or noc');
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168
169$bar = 0;
170select(OUT);
171$got = timethis($iterations, '++$bar');
172select(STDOUT);
173isa_ok($got, 'Benchmark', "timethis eval");
174is ($bar, $iterations, "benchmarked code was run $iterations times");
175
176$got = $out->read();
177like ($got, qr/^timethis $iterations/, 'default title');
53aa2791 178like ($got, $Default_Pattern, 'default format is all or noc');
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179
180my $title = 'lies, damn lies and benchmarks';
181$foo = 0;
182select(OUT);
183$got = timethis($iterations, sub {++$foo}, $title);
184select(STDOUT);
185isa_ok($got, 'Benchmark', "timethis with title");
186is ($foo, $iterations, "benchmarked code was run $iterations times");
187
188$got = $out->read();
189like ($got, qr/^$title:/, 'specify title');
53aa2791 190like ($got, $Default_Pattern, 'default format is all or noc');
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191
192# default is auto, which is all or noc. nop can never match the default
193$foo = 0;
194select(OUT);
195$got = timethis($iterations, sub {++$foo}, $title, 'nop');
196select(STDOUT);
197isa_ok($got, 'Benchmark', "timethis with format");
198is ($foo, $iterations, "benchmarked code was run $iterations times");
199
200$got = $out->read();
201like ($got, qr/^$title:/, 'specify title');
53aa2791 202like ($got, $Nop_Pattern, 'specify format as nop');
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203
204{
205 $foo = 0;
206 select(OUT);
207 my $start = time;
208 $got = timethis(-2, sub {$foo+= fib($ballast)}, $title, 'none');
209 my $end = time;
210 select(STDOUT);
211 isa_ok($got, 'Benchmark',
212 "timethis, at least 2 seconds with format 'none'");
213 ok ($foo > 0, "benchmarked code was run");
214 ok ($end - $start > 1, "benchmarked code ran for over 1 second");
215
216 $got = $out->read();
217 # Remove any warnings about having too few iterations.
218 $got =~ s/\(warning:[^\)]+\)//gs;
219 $got =~ s/^[ \t\n]+//s; # Remove all the whitespace from the beginning
220
221 is ($got, '', "format 'none' should suppress output");
222}
223
224$foo = $bar = $baz = 0;
225select(OUT);
226$got = timethese($iterations, { Foo => sub {++$foo}, Bar => '++$bar',
227 Baz => sub {++$baz} });
228select(STDOUT);
229is(ref ($got), 'HASH', "timethese should return a hashref");
230isa_ok($got->{Foo}, 'Benchmark', "Foo value");
231isa_ok($got->{Bar}, 'Benchmark', "Bar value");
232isa_ok($got->{Baz}, 'Benchmark', "Baz value");
233eq_set([keys %$got], [qw(Foo Bar Baz)], 'should be exactly three objects');
234is ($foo, $iterations, "Foo code was run $iterations times");
235is ($bar, $iterations, "Bar code was run $iterations times");
236is ($baz, $iterations, "Baz code was run $iterations times");
237
238$got = $out->read();
239# Remove any warnings about having too few iterations.
240$got =~ s/\(warning:[^\)]+\)//gs;
241
242like ($got, qr/timing $iterations iterations of\s+Bar\W+Baz\W+Foo\W*?\.\.\./s,
243 'check title');
244# Remove the title
245$got =~ s/.*\.\.\.//s;
246like ($got, qr/\bBar\b.*\bBaz\b.*\bFoo\b/s, 'check output is in sorted order');
53aa2791
MS
247like ($got, $Default_Pattern, 'should find default format somewhere');
248
249
250{ # ensure 'use strict' does not leak from Benchmark.pm into benchmarked code
251 no strict;
252 select OUT;
253
254 eval {
255 timethese( 1,
256 { undeclared_var => q{ $i++; $i-- },
257 symbolic_ref => q{ $bar = 42;
258 $foo = 'bar';
259 $q = ${$foo} },
260 },
261 'none'
262 );
263
264 };
265 is( $@, '', q{no strict leakage in name => 'code'} );
266
267 eval {
268 timethese( 1,
269 { undeclared_var => sub { $i++; $i-- },
270 symbolic_ref => sub { $bar = 42;
271 $foo = 'bar';
272 return ${$foo} },
273 },
274 'none'
275 );
276 };
277 is( $@, '', q{no strict leakage in name => sub { code }} );
278
279 # clear out buffer
280 $out->read;
281}
282
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283
284my $code_to_test = { Foo => sub {$foo+=fib($ballast-2)},
285 Bar => sub {$bar+=fib($ballast)}};
286# Keep these for later.
287my $results;
288{
289 $foo = $bar = 0;
290 select(OUT);
291 my $start = times;
292 $results = timethese(-0.1, $code_to_test, 'none');
293 my $end = times;
294 select(STDOUT);
295
296 is(ref ($results), 'HASH', "timethese should return a hashref");
297 isa_ok($results->{Foo}, 'Benchmark', "Foo value");
298 isa_ok($results->{Bar}, 'Benchmark', "Bar value");
299 eq_set([keys %$results], [qw(Foo Bar)], 'should be exactly two objects');
300 ok ($foo > 0, "Foo code was run");
301 ok ($bar > 0, "Bar code was run");
302
303 ok (($end - $start) > 0.1, "benchmarked code ran for over 0.1 seconds");
304
305 $got = $out->read();
306 # Remove any warnings about having too few iterations.
307 $got =~ s/\(warning:[^\)]+\)//gs;
308 is ($got =~ tr/ \t\n//c, 0, "format 'none' should suppress output");
309}
310my $graph_dissassembly =
311 qr!^[ \t]+(\S+)[ \t]+(\w+)[ \t]+(\w+)[ \t]* # Title line
312 \n[ \t]*(\w+)[ \t]+([0-9.]+(?:/s)?)[ \t]+(-+)[ \t]+(-?\d+%)[ \t]*
313 \n[ \t]*(\w+)[ \t]+([0-9.]+(?:/s)?)[ \t]+(-?\d+%)[ \t]+(-+)[ \t]*$!xm;
314
315sub check_graph_consistency {
316 my ( $ratetext, $slowc, $fastc,
317 $slowr, $slowratet, $slowslow, $slowfastt,
318 $fastr, $fastratet, $fastslowt, $fastfast)
319 = @_;
ca55f232 320 note("calling check_graph_consistency from line " . (caller(1))[2]);
23c50b23
NC
321 my $all_passed = 1;
322 $all_passed
323 &= is ($slowc, $slowr, "left col tag should be top row tag");
324 $all_passed
325 &= is ($fastc, $fastr, "right col tag should be bottom row tag");
326 $all_passed &=
327 like ($slowslow, qr/^-+/, "should be dash for comparing slow with slow");
328 $all_passed
329 &= is ($slowslow, $fastfast, "slow v slow should be same as fast v fast");
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330 my $slowrate = $slowratet;
331 my $fastrate = $fastratet;
332 my ($slow_is_rate, $fast_is_rate);
333 unless ($slow_is_rate = $slowrate =~ s!/s!!) {
334 # Slow is expressed as iters per second.
335 $slowrate = 1/$slowrate if $slowrate;
336 }
337 unless ($fast_is_rate = $fastrate =~ s!/s!!) {
338 # Fast is expressed as iters per second.
339 $fastrate = 1/$fastrate if $fastrate;
340 }
341 if ($ratetext =~ /rate/i) {
23c50b23
NC
342 $all_passed
343 &= ok ($slow_is_rate, "slow should be expressed as a rate");
344 $all_passed
345 &= ok ($fast_is_rate, "fast should be expressed as a rate");
0e74ff8e 346 } else {
23c50b23
NC
347 $all_passed &=
348 ok (!$slow_is_rate, "slow should be expressed as a iters per second");
349 $all_passed &=
350 ok (!$fast_is_rate, "fast should be expressed as a iters per second");
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351 }
352
353 (my $slowfast = $slowfastt) =~ s!%!!;
354 (my $fastslow = $fastslowt) =~ s!%!!;
355 if ($slowrate < $fastrate) {
356 pass ("slow rate is less than fast rate");
07e88136
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357 unless (ok ($slowfast <= 0 && $slowfast >= -100,
358 "slowfast should be less than or equal to zero, and >= -100")) {
2d684b7a 359 print STDERR "# slowfast $slowfast\n";
23c50b23
NC
360 $all_passed = 0;
361 }
362 unless (ok ($fastslow > 0, "fastslow should be > 0")) {
e5967bfd 363 print STDERR "# fastslow $fastslow\n";
23c50b23
NC
364 $all_passed = 0;
365 }
0e74ff8e 366 } else {
23c50b23
NC
367 $all_passed
368 &= is ($slowrate, $fastrate,
369 "slow rate isn't less than fast rate, so should be the same");
620b59a5
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370 # In OpenBSD the $slowfast is sometimes a really, really, really
371 # small number less than zero, and this gets stringified as -0.
23c50b23 372 $all_passed
620b59a5 373 &= like ($slowfast, qr/^-?0$/, "slowfast should be zero");
23c50b23 374 $all_passed
620b59a5 375 &= like ($fastslow, qr/^-?0$/, "fastslow should be zero");
0e74ff8e 376 }
23c50b23 377 return $all_passed;
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378}
379
380sub check_graph_vs_output {
381 my ($chart, $got) = @_;
382 my ( $ratetext, $slowc, $fastc,
383 $slowr, $slowratet, $slowslow, $slowfastt,
384 $fastr, $fastratet, $fastslowt, $fastfast)
385 = $got =~ $graph_dissassembly;
23c50b23
NC
386 my $all_passed
387 = check_graph_consistency ( $ratetext, $slowc, $fastc,
388 $slowr, $slowratet, $slowslow, $slowfastt,
389 $fastr, $fastratet, $fastslowt, $fastfast);
390 $all_passed
391 &= is_deeply ($chart, [['', $ratetext, $slowc, $fastc],
392 [$slowr, $slowratet, $slowslow, $slowfastt],
393 [$fastr, $fastratet, $fastslowt, $fastfast]],
394 "check the chart layout matches the formatted output");
395 unless ($all_passed) {
396 print STDERR "# Something went wrong there. I got this chart:\n";
397 print STDERR "# $_\n" foreach split /\n/, $got;
398 }
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399}
400
401sub check_graph {
402 my ($title, $row1, $row2) = @_;
403 is (scalar @$title, 4, "Four entries in title row");
404 is (scalar @$row1, 4, "Four entries in first row");
405 is (scalar @$row2, 4, "Four entries in second row");
406 is (shift @$title, '', "First entry of output graph should be ''");
407 check_graph_consistency (@$title, @$row1, @$row2);
408}
409
410{
411 select(OUT);
412 my $start = times;
8962dfd6 413 my $chart = cmpthese( -0.1, { a => "++\$i", b => "\$i = sqrt(\$i++)" }, "auto" ) ;
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414 my $end = times;
415 select(STDOUT);
416 ok (($end - $start) > 0.05, "benchmarked code ran for over 0.05 seconds");
417
418 $got = $out->read();
419 # Remove any warnings about having too few iterations.
420 $got =~ s/\(warning:[^\)]+\)//gs;
421
422 like ($got, qr/running\W+a\W+b.*?for at least 0\.1 CPU second/s,
423 'check title');
424 # Remove the title
425 $got =~ s/.*\.\.\.//s;
53aa2791 426 like ($got, $Default_Pattern, 'should find default format somewhere');
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427 like ($got, $graph_dissassembly, "Should find the output graph somewhere");
428 check_graph_vs_output ($chart, $got);
429}
430
8962dfd6
A
431# Not giving auto should suppress timethese results.
432{
433 select(OUT);
434 my $start = times;
435 my $chart = cmpthese( -0.1, { a => "++\$i", b => "\$i = sqrt(\$i++)" } ) ;
436 my $end = times;
437 select(STDOUT);
438 ok (($end - $start) > 0.05, "benchmarked code ran for over 0.05 seconds");
439
440 $got = $out->read();
441 # Remove any warnings about having too few iterations.
442 $got =~ s/\(warning:[^\)]+\)//gs;
443
444 unlike ($got, qr/running\W+a\W+b.*?for at least 0\.1 CPU second/s,
445 'should not have title');
446 # Remove the title
447 $got =~ s/.*\.\.\.//s;
53aa2791 448 unlike ($got, $Default_Pattern, 'should not find default format somewhere');
8962dfd6
A
449 like ($got, $graph_dissassembly, "Should find the output graph somewhere");
450 check_graph_vs_output ($chart, $got);
451}
452
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453{
454 $foo = $bar = 0;
455 select(OUT);
456 my $chart = cmpthese( 10, $code_to_test, 'nop' ) ;
457 select(STDOUT);
458 ok ($foo > 0, "Foo code was run");
459 ok ($bar > 0, "Bar code was run");
460
461 $got = $out->read();
462 # Remove any warnings about having too few iterations.
463 $got =~ s/\(warning:[^\)]+\)//gs;
464 like ($got, qr/timing 10 iterations of\s+Bar\W+Foo\W*?\.\.\./s,
465 'check title');
466 # Remove the title
467 $got =~ s/.*\.\.\.//s;
53aa2791 468 like ($got, $Nop_Pattern, 'specify format as nop');
0e74ff8e
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469 like ($got, $graph_dissassembly, "Should find the output graph somewhere");
470 check_graph_vs_output ($chart, $got);
471}
472
473{
474 $foo = $bar = 0;
475 select(OUT);
476 my $chart = cmpthese( 10, $code_to_test, 'none' ) ;
477 select(STDOUT);
478 ok ($foo > 0, "Foo code was run");
479 ok ($bar > 0, "Bar code was run");
480
481 $got = $out->read();
482 # Remove any warnings about having too few iterations.
483 $got =~ s/\(warning:[^\)]+\)//gs;
484 $got =~ s/^[ \t\n]+//s; # Remove all the whitespace from the beginning
485 is ($got, '', "format 'none' should suppress output");
486 is (ref $chart, 'ARRAY', "output should be an array ref");
487 # Some of these will go bang if the preceding test fails. There will be
488 # a big clue as to why, from the previous test's diagnostic
489 is (ref $chart->[0], 'ARRAY', "output should be an array of arrays");
490 check_graph (@$chart);
491}
492
493{
494 $foo = $bar = 0;
495 select(OUT);
496 my $chart = cmpthese( $results ) ;
497 select(STDOUT);
498 is ($foo, 0, "Foo code was not run");
499 is ($bar, 0, "Bar code was not run");
500
501 $got = $out->read();
502 ok ($got !~ /\.\.\./s, 'check that there is no title');
503 like ($got, $graph_dissassembly, "Should find the output graph somewhere");
504 check_graph_vs_output ($chart, $got);
505}
506
507{
508 $foo = $bar = 0;
509 select(OUT);
510 my $chart = cmpthese( $results, 'none' ) ;
511 select(STDOUT);
512 is ($foo, 0, "Foo code was not run");
513 is ($bar, 0, "Bar code was not run");
514
515 $got = $out->read();
516 is ($got, '', "'none' should suppress all output");
517 is (ref $chart, 'ARRAY', "output should be an array ref");
518 # Some of these will go bang if the preceding test fails. There will be
519 # a big clue as to why, from the previous test's diagnostic
520 is (ref $chart->[0], 'ARRAY', "output should be an array of arrays");
521 check_graph (@$chart);
522}
523
524###}my $out = tie *OUT, 'TieOut'; my ($got); ###
525
526my $debug = tie *STDERR, 'TieOut';
527
528$bar = 0;
529isa_ok(timeit(5, '++$bar'), 'Benchmark', "timeit eval");
530is ($bar, 5, "benchmarked code was run 5 times");
531is ($debug->read(), '', "There was no debug output");
532
533Benchmark->debug(1);
534
535$bar = 0;
536select(OUT);
537$got = timeit(5, '++$bar');
538select(STDOUT);
539isa_ok($got, 'Benchmark', "timeit eval");
540is ($bar, 5, "benchmarked code was run 5 times");
541is ($out->read(), '', "There was no STDOUT output with debug enabled");
542isnt ($debug->read(), '', "There was STDERR debug output with debug enabled");
543
544Benchmark->debug(0);
545
546$bar = 0;
547isa_ok(timeit(5, '++$bar'), 'Benchmark', "timeit eval");
548is ($bar, 5, "benchmarked code was run 5 times");
549is ($debug->read(), '', "There was no debug output debug disabled");
550
551undef $debug;
552untie *STDERR;
553
554# To check the cache we are poking where we don't belong, inside the namespace.
98dc9551 555# The way benchmark is written we can't actually check whether the cache is
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556# being used, merely what's become cached.
557
558clearallcache();
53aa2791 559my @before_keys = keys %Benchmark::Cache;
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560$bar = 0;
561isa_ok(timeit(5, '++$bar'), 'Benchmark', "timeit eval");
562is ($bar, 5, "benchmarked code was run 5 times");
53aa2791 563my @after5_keys = keys %Benchmark::Cache;
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564$bar = 0;
565isa_ok(timeit(10, '++$bar'), 'Benchmark', "timeit eval");
566is ($bar, 10, "benchmarked code was run 10 times");
53aa2791 567ok (!eq_array ([keys %Benchmark::Cache], \@after5_keys), "10 differs from 5");
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568
569clearcache(10);
570# Hash key order will be the same if there are the same keys.
53aa2791 571is_deeply ([keys %Benchmark::Cache], \@after5_keys,
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572 "cleared 10, only cached results for 5 should remain");
573
574clearallcache();
53aa2791 575is_deeply ([keys %Benchmark::Cache], \@before_keys,
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576 "back to square 1 when we clear the cache again?");
577
578
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579{ # Check usage error messages
580 my %usage = %Benchmark::_Usage;
581 delete $usage{runloop}; # not public, not worrying about it just now
582
583 my @takes_no_args = qw(clearallcache disablecache enablecache);
584
585 my %cmpthese = ('forgot {}' => 'cmpthese( 42, foo => sub { 1 } )',
586 'not result' => 'cmpthese(42)',
587 'array ref' => 'cmpthese( 42, [ foo => sub { 1 } ] )',
588 );
589 while( my($name, $code) = each %cmpthese ) {
590 eval $code;
591 is( $@, $usage{cmpthese}, "cmpthese usage: $name" );
592 }
593
594 my %timethese = ('forgot {}' => 'timethese( 42, foo => sub { 1 } )',
595 'no code' => 'timethese(42)',
596 'array ref' => 'timethese( 42, [ foo => sub { 1 } ] )',
597 );
598
599 while( my($name, $code) = each %timethese ) {
600 eval $code;
601 is( $@, $usage{timethese}, "timethese usage: $name" );
602 }
603
604
605 while( my($func, $usage) = each %usage ) {
606 next if grep $func eq $_, @takes_no_args;
607 eval "$func()";
608 is( $@, $usage, "$func usage: no args" );
609 }
610
611 foreach my $func (@takes_no_args) {
612 eval "$func(42)";
f695f0e6 613 is( $@, $usage{$func}, "$func usage: with args" );
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614 }
615}
616
617
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618package TieOut;
619
620sub TIEHANDLE {
621 my $class = shift;
622 bless(\( my $ref = ''), $class);
623}
624
625sub PRINT {
626 my $self = shift;
627 $$self .= join('', @_);
628}
629
630sub PRINTF {
631 my $self = shift;
632 $$self .= sprintf shift, @_;
633}
634
635sub read {
636 my $self = shift;
637 return substr($$self, 0, length($$self), '');
638}