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1 | package OptreeCheck; |
2 | use base 'Exporter'; |
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3 | use strict; |
4 | use warnings; |
5 | use vars qw(@open_todo $TODO); |
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6 | require "test.pl"; |
7 | |
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8 | our $VERSION = '0.02'; |
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9 | |
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10 | # now export checkOptree, and those test.pl functions used by tests |
11 | our @EXPORT = qw( checkOptree plan skip skip_all pass is like unlike |
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12 | require_ok runperl @open_todo); |
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13 | |
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14 | |
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15 | # This is a bit of a kludge. Really we need to find a way to encode in the |
16 | # golden results that the hints wll differ because ${^OPEN} is set. |
17 | |
18 | if (((caller 0)[10]||{})->{'open'}) { |
19 | @open_todo = (skip => "\${^OPEN} is set"); |
20 | } |
21 | |
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22 | =head1 NAME |
23 | |
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24 | OptreeCheck - check optrees as rendered by B::Concise |
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25 | |
26 | =head1 SYNOPSIS |
27 | |
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28 | OptreeCheck supports 'golden-sample' regression testing of perl's |
29 | parser, optimizer, bytecode generator, via a single function: |
30 | checkOptree(%in). |
31 | |
32 | It invokes B::Concise upon the sample code, checks that the rendering |
33 | 'agrees' with the golden sample, and reports mismatches. |
34 | |
35 | Additionally, the module processes @ARGV (which is typically unused in |
36 | the Core test harness), and thus provides a means to run the tests in |
37 | various modes. |
38 | |
39 | =head1 EXAMPLE |
40 | |
41 | # your test file |
42 | use OptreeCheck; |
43 | plan tests => 1; |
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44 | |
45 | checkOptree ( |
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46 | name => "test-name', # optional, made from others if not given |
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47 | |
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48 | # code-under-test: must provide 1 of them |
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49 | code => sub {my $a}, # coderef, or source (wrapped and evald) |
50 | prog => 'sort @a', # run in subprocess, aka -MO=Concise |
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51 | bcopts => '-exec', # $opt or \@opts, passed to BC::compile |
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52 | |
53 | errs => 'Useless variable "@main::a" .*' # str, regex, [str+] [regex+], |
54 | |
55 | # various test options |
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56 | # errs => '.*', # match against any emitted errs, -w warnings |
57 | # skip => 1, # skips test |
58 | # todo => 'excuse', # anticipated failures |
59 | # fail => 1 # force fail (by redirecting result) |
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60 | # retry => 1 # retry on test failure |
61 | # debug => 1, # use re 'debug' for retried failures !! |
62 | |
63 | # the 'golden-sample's, (must provide both) |
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64 | |
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65 | expect => <<'EOT_EOT', expect_nt => <<'EONT_EONT' ); # start HERE-DOCS |
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66 | # 1 <;> nextstate(main 45 optree.t:23) v |
67 | # 2 <0> padsv[$a:45,46] M/LVINTRO |
68 | # 3 <1> leavesub[1 ref] K/REFC,1 |
69 | EOT_EOT |
70 | # 1 <;> nextstate(main 45 optree.t:23) v |
71 | # 2 <0> padsv[$a:45,46] M/LVINTRO |
72 | # 3 <1> leavesub[1 ref] K/REFC,1 |
73 | EONT_EONT |
74 | |
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75 | __END__ |
76 | |
77 | =head2 Failure Reports |
78 | |
79 | Heres a sample failure, as induced by the following command. |
80 | Note the argument; option=value, after the test-file, more on that later |
81 | |
82 | $> PERL_CORE=1 ./perl ext/B/t/optree_check.t testmode=cross |
83 | ... |
84 | ok 19 - canonical example w -basic |
85 | not ok 20 - -exec code: $a=$b+42 |
86 | # Failed at test.pl line 249 |
87 | # got '1 <;> nextstate(main 600 optree_check.t:208) v |
88 | # 2 <#> gvsv[*b] s |
89 | # 3 <$> const[IV 42] s |
90 | # 4 <2> add[t3] sK/2 |
91 | # 5 <#> gvsv[*a] s |
92 | # 6 <2> sassign sKS/2 |
93 | # 7 <1> leavesub[1 ref] K/REFC,1 |
94 | # ' |
95 | # expected /(?ms-xi:^1 <;> (?:next|db)state(.*?) v |
96 | # 2 <\$> gvsv\(\*b\) s |
97 | # 3 <\$> const\(IV 42\) s |
98 | # 4 <2> add\[t\d+\] sK/2 |
99 | # 5 <\$> gvsv\(\*a\) s |
100 | # 6 <2> sassign sKS/2 |
101 | # 7 <1> leavesub\[\d+ refs?\] K/REFC,1 |
102 | # $)/ |
103 | # got: '2 <#> gvsv[*b] s' |
104 | # want: (?-xism:2 <\$> gvsv\(\*b\) s) |
105 | # got: '3 <$> const[IV 42] s' |
106 | # want: (?-xism:3 <\$> const\(IV 42\) s) |
107 | # got: '5 <#> gvsv[*a] s' |
108 | # want: (?-xism:5 <\$> gvsv\(\*a\) s) |
109 | # remainder: |
110 | # 2 <#> gvsv[*b] s |
111 | # 3 <$> const[IV 42] s |
112 | # 5 <#> gvsv[*a] s |
113 | # these lines not matched: |
114 | # 2 <#> gvsv[*b] s |
115 | # 3 <$> const[IV 42] s |
116 | # 5 <#> gvsv[*a] s |
117 | |
118 | Errors are reported 3 different ways; |
119 | |
120 | The 1st form is directly from test.pl's like() and unlike(). Note |
121 | that this form is used as input, so you can easily cut-paste results |
122 | into test-files you are developing. Just make sure you recognize |
123 | insane results, to avoid canonizing them as golden samples. |
124 | |
125 | The 2nd and 3rd forms show only the unexpected results and opcodes. |
126 | This is done because it's blindingly tedious to find a single opcode |
127 | causing the failure. 2 different ways are done in case one is |
128 | unhelpful. |
129 | |
130 | =head1 TestCase Overview |
131 | |
132 | checkOptree(%tc) constructs a testcase object from %tc, and then calls |
133 | methods which eventually call test.pl's like() to produce test |
134 | results. |
135 | |
136 | =head2 getRendering |
137 | |
138 | getRendering() runs code or prog through B::Concise, and captures its |
139 | rendering. Errors emitted during rendering are checked against |
140 | expected errors, and are reported as diagnostics by default, or as |
141 | failures if 'report=fail' cmdline-option is given. |
142 | |
143 | prog is run in a sub-shell, with $bcopts passed through. This is the way |
144 | to run code intended for main. The code arg in contrast, is always a |
145 | CODEREF, either because it starts that way as an arg, or because it's |
146 | wrapped and eval'd as $sub = sub {$code}; |
147 | |
148 | =head2 mkCheckRex |
149 | |
150 | mkCheckRex() selects the golden-sample for the threaded-ness of the |
151 | platform, and produces a regex which matches the expected rendering, |
152 | and fails when it doesn't match. |
153 | |
154 | The regex includes 'workarounds' which accommodate expected rendering |
155 | variations. These include: |
156 | |
157 | string constants # avoid injection |
158 | line numbers, etc # args of nexstate() |
159 | hexadecimal-numbers |
160 | |
161 | pad-slot-assignments # for 5.8 compat, and testmode=cross |
162 | (map|grep)(start|while) # for 5.8 compat |
163 | |
164 | =head2 mylike |
165 | |
166 | mylike() calls either unlike() or like(), depending on |
167 | expectations. Mismatch reports are massaged, because the actual |
168 | difference can easily be lost in the forest of opcodes. |
169 | |
170 | =head1 checkOptree API and Operation |
171 | |
172 | Since the arg is a hash, the api is wide-open, and this really is |
173 | about what elements must be or are in the hash, and what they do. %tc |
174 | is passed to newTestCase(), the ctor, which adds in %proto, a global |
175 | prototype object. |
176 | |
177 | =head2 name => STRING |
178 | |
179 | If name property is not provided, it is synthesized from these params: |
180 | bcopts, note, prog, code. This is more convenient than trying to do |
181 | it manually. |
182 | |
183 | =head2 code or prog |
184 | |
185 | Either code or prog must be present. |
186 | |
187 | =head2 prog => $perl_source_string |
188 | |
189 | prog => $src provides a snippet of code, which is run in a sub-process, |
190 | via test.pl:runperl, and through B::Concise like so: |
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191 | |
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192 | './perl -w -MO=Concise,$bcopts_massaged -e $src' |
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193 | |
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194 | =head2 code => $perl_source_string || CODEREF |
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195 | |
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196 | The $code arg is passed to B::Concise::compile(), and run in-process. |
197 | If $code is a string, it's first wrapped and eval'd into a $coderef. |
198 | In either case, $coderef is then passed to B::Concise::compile(): |
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199 | |
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200 | $subref = eval "sub{$code}"; |
201 | $render = B::Concise::compile($subref)->(); |
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202 | |
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203 | =head2 expect and expect_nt |
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204 | |
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205 | expect and expect_nt args are the B<golden-sample> renderings, and are |
206 | sampled from known-ok threaded and un-threaded bleadperl (5.9.1) builds. |
207 | They're both required, and the correct one is selected for the platform |
208 | being tested, and saved into the synthesized property B<wanted>. |
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209 | |
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210 | =head2 bcopts => $bcopts || [ @bcopts ] |
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211 | |
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212 | When getRendering() runs, it passes bcopts into B::Concise::compile(). |
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213 | The bcopts arg can be a single string, or an array of strings. |
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214 | |
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215 | =head2 errs => $err_str_regex || [ @err_str_regexs ] |
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216 | |
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217 | getRendering() processes the code or prog arg under warnings, and both |
218 | parsing and optree-traversal errors are collected. These are |
219 | validated against the one or more errors you specify. |
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220 | |
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221 | =head1 testcase modifier properties |
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222 | |
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223 | These properties are set as %tc parameters to change test behavior. |
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224 | |
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225 | =head2 skip => 'reason' |
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226 | |
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227 | invokes skip('reason'), causing test to skip. |
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228 | |
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229 | =head2 todo => 'reason' |
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230 | |
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231 | invokes todo('reason') |
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232 | |
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233 | =head2 fail => 1 |
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234 | |
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235 | For code arguments, this option causes getRendering to redirect the |
236 | rendering operation to STDERR, which causes the regex match to fail. |
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237 | |
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238 | =head2 retry => 1 |
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239 | |
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240 | If retry is set, and a test fails, it is run a second time, possibly |
241 | with regex debug. |
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242 | |
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243 | =head2 debug => 1 |
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244 | |
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245 | If a failure is retried, this turns on eval "use re 'debug'", thus |
246 | turning on regex debug. It's quite verbose, and not hugely helpful. |
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247 | |
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248 | =head2 noanchors => 1 |
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249 | |
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250 | If set, this relaxes the regex check, which is normally pretty strict. |
251 | It's used primarily to validate checkOptree via tests in optree_check. |
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252 | |
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253 | |
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254 | =head1 Synthesized object properties |
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255 | |
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256 | These properties are added into the test object during execution. |
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257 | |
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258 | =head2 wanted |
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259 | |
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260 | This stores the chosen expect expect_nt string. The OptreeCheck |
261 | object may in the future delete the raw strings once wanted is set, |
262 | thus saving space. |
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263 | |
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264 | =head2 cross => 1 |
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265 | |
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266 | This tag is added if testmode=cross is passed in as argument. |
267 | It causes test-harness to purposely use the wrong string. |
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268 | |
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269 | |
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270 | =head2 checkErrs |
271 | |
272 | checkErrs() is a getRendering helper that verifies that expected errs |
273 | against those found when rendering the code on the platform. It is |
274 | run after rendering, and before mkCheckRex. |
275 | |
276 | Errors can be reported 3 different ways; diag, fail, print. |
277 | |
278 | diag - uses test.pl _diag() |
279 | fail - causes double-testing |
280 | print-.no # in front of the output (may mess up test harnesses) |
281 | |
282 | The 3 ways are selectable at runtimve via cmdline-arg: |
283 | report={diag,fail,print}. |
284 | |
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285 | |
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286 | |
287 | =cut |
288 | |
289 | use Config; |
290 | use Carp; |
291 | use B::Concise qw(walk_output); |
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292 | |
293 | BEGIN { |
294 | $SIG{__WARN__} = sub { |
295 | my $err = shift; |
296 | $err =~ m/Subroutine re::(un)?install redefined/ and return; |
297 | }; |
298 | } |
299 | |
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300 | sub import { |
301 | my $pkg = shift; |
302 | $pkg->export_to_level(1,'checkOptree', @EXPORT); |
303 | getCmdLine(); # process @ARGV |
304 | } |
305 | |
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306 | |
307 | # %gOpts params comprise a global test-state. Initial values here are |
308 | # HELP strings, they MUST BE REPLACED by runtime values before use, as |
309 | # is done by getCmdLine(), via import |
310 | |
311 | our %gOpts = # values are replaced at runtime !! |
312 | ( |
313 | # scalar values are help string |
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314 | retry => 'retry failures after turning on re debug', |
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315 | debug => 'turn on re debug for those retries', |
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316 | selftest => 'self-tests mkCheckRex vs the reference rendering', |
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317 | |
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318 | fail => 'force all test to fail, print to stdout', |
319 | dump => 'dump cmdline arg prcessing', |
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320 | noanchors => 'dont anchor match rex', |
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321 | |
322 | # array values are one-of selections, with 1st value as default |
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323 | # array: 2nd value is used as help-str, 1st val (still) default |
324 | help => [0, 'provides help and exits', 0], |
325 | testmode => [qw/ native cross both /], |
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326 | |
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327 | # reporting mode for rendering errs |
328 | report => [qw/ diag fail print /], |
329 | errcont => [1, 'if 1, tests match even if report is fail', 0], |
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330 | |
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331 | # fixup for VMS, cygwin, which dont have stderr b4 stdout |
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332 | rxnoorder => [1, 'if 1, dont req match on -e lines, and -banner',0], |
333 | strip => [1, 'if 1, catch errs and remove from renderings',0], |
334 | stripv => 'if strip&&1, be verbose about it', |
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335 | errs => 'expected compile errs, array if several', |
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336 | ); |
337 | |
338 | |
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339 | # Not sure if this is too much cheating. Officially we say that |
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340 | # $Config::Config{usethreads} is true if some sort of threading is in |
341 | # use, in which case we ought to be able to use it in place of the || |
342 | # below. However, it is now possible to Configure perl with "threads" |
343 | # but neither ithreads or 5005threads, which forces the re-entrant |
344 | # APIs, but no perl user visible threading. |
345 | |
346 | # This seems to have the side effect that most of perl doesn't think |
347 | # that it's threaded, hence the ops aren't threaded either. Not sure |
348 | # if this is actually a "supported" configuration, but given that |
349 | # ponie uses it, it's going to be used by something official at least |
350 | # in the interim. So it's nice for tests to all pass. |
351 | |
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352 | our $threaded = 1 |
353 | if $Config::Config{useithreads} || $Config::Config{use5005threads}; |
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354 | our $platform = ($threaded) ? "threaded" : "plain"; |
355 | our $thrstat = ($threaded) ? "threaded" : "nonthreaded"; |
356 | |
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357 | our %modes = ( |
358 | both => [ 'expect', 'expect_nt'], |
359 | native => [ ($threaded) ? 'expect' : 'expect_nt'], |
360 | cross => [ !($threaded) ? 'expect' : 'expect_nt'], |
361 | expect => [ 'expect' ], |
362 | expect_nt => [ 'expect_nt' ], |
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363 | ); |
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364 | |
365 | our %msgs # announce cross-testing. |
366 | = ( |
367 | # cross-platform |
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368 | 'expect_nt-threaded' => " (nT on T) ", |
369 | 'expect-nonthreaded' => " (T on nT) ", |
370 | # native - nothing to say (must stay empty - used for $crosstesting) |
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371 | 'expect_nt-nonthreaded' => '', |
372 | 'expect-threaded' => '', |
373 | ); |
374 | |
375 | ####### |
376 | sub getCmdLine { # import assistant |
377 | # offer help |
378 | print(qq{\n$0 accepts args to update these state-vars: |
379 | turn on a flag by typing its name, |
380 | select a value from list by typing name=val.\n }, |
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381 | mydumper(\%gOpts)) |
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382 | if grep /help/, @ARGV; |
383 | |
384 | # replace values for each key !! MUST MARK UP %gOpts |
385 | foreach my $opt (keys %gOpts) { |
386 | |
387 | # scan ARGV for known params |
388 | if (ref $gOpts{$opt} eq 'ARRAY') { |
389 | |
390 | # $opt is a One-Of construct |
391 | # replace with valid selection from the list |
392 | |
393 | # uhh this WORKS. but it's inscrutable |
394 | # grep s/$opt=(\w+)/grep {$_ eq $1} @ARGV and $gOpts{$opt}=$1/e, @ARGV; |
395 | my $tval; # temp |
396 | if (grep s/$opt=(\w+)/$tval=$1/e, @ARGV) { |
397 | # check val before accepting |
398 | my @allowed = @{$gOpts{$opt}}; |
399 | if (grep { $_ eq $tval } @allowed) { |
400 | $gOpts{$opt} = $tval; |
401 | } |
402 | else {die "invalid value: '$tval' for $opt\n"} |
403 | } |
404 | |
405 | # take 1st val as default |
406 | $gOpts{$opt} = ${$gOpts{$opt}}[0] |
407 | if ref $gOpts{$opt} eq 'ARRAY'; |
408 | } |
409 | else { # handle scalars |
410 | |
411 | # if 'opt' is present, true |
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412 | $gOpts{$opt} = (grep /^$opt/, @ARGV) ? 1 : 0; |
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413 | |
414 | # override with 'foo' if 'opt=foo' appears |
415 | grep s/$opt=(.*)/$gOpts{$opt}=$1/e, @ARGV; |
416 | } |
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417 | } |
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418 | print("$0 heres current state:\n", mydumper(\%gOpts)) |
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419 | if $gOpts{help} or $gOpts{dump}; |
420 | |
421 | exit if $gOpts{help}; |
422 | } |
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423 | # the above arg-handling cruft should be replaced by a Getopt call |
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424 | |
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425 | ############################## |
426 | # the API (1 function) |
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427 | |
428 | sub checkOptree { |
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429 | my $tc = newTestCases(@_); # ctor |
430 | my ($rendering); |
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431 | |
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432 | print "checkOptree args: ",mydumper($tc) if $tc->{dump}; |
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433 | SKIP: { |
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434 | skip("$tc->{skip} $tc->{name}", 1) if $tc->{skip}; |
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435 | |
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436 | return runSelftest($tc) if $gOpts{selftest}; |
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437 | |
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438 | $tc->getRendering(); # get the actual output |
439 | $tc->checkErrs(); |
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440 | |
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441 | TODO: |
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442 | foreach my $want (@{$modes{$gOpts{testmode}}}) { |
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443 | local $TODO = $tc->{todo} if $tc->{todo}; |
444 | |
445 | $tc->{cross} = $msgs{"$want-$thrstat"}; |
446 | |
447 | $tc->mkCheckRex($want); |
448 | $tc->mylike(); |
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449 | } |
450 | } |
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451 | return; |
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452 | } |
453 | |
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454 | sub newTestCases { |
455 | # make test objects (currently 1) from args (passed to checkOptree) |
456 | my $tc = bless { @_ }, __PACKAGE__ |
457 | or die "test cases are hashes"; |
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458 | |
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459 | $tc->label(); |
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460 | |
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461 | # cpy globals into each test |
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462 | foreach my $k (keys %gOpts) { |
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463 | if ($gOpts{$k}) { |
464 | $tc->{$k} = $gOpts{$k} unless defined $tc->{$k}; |
465 | } |
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466 | } |
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467 | # transform errs to self-hash for efficient set-math |
468 | if ($tc->{errs}) { |
469 | if (not ref $tc->{errs}) { |
470 | $tc->{errs} = { $tc->{errs} => 1}; |
471 | } |
472 | elsif (ref $tc->{errs} eq 'ARRAY') { |
473 | my %errs; |
474 | @errs{@{$tc->{errs}}} = (1) x @{$tc->{errs}}; |
475 | $tc->{errs} = \%errs; |
476 | } |
477 | elsif (ref $tc->{errs} eq 'Regexp') { |
478 | warn "regexp err matching not yet implemented"; |
479 | } |
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480 | } |
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481 | return $tc; |
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482 | } |
483 | |
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484 | sub label { |
485 | # may help get/keep test output consistent |
486 | my ($tc) = @_; |
487 | return $tc->{name} if $tc->{name}; |
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488 | |
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489 | my $buf = (ref $tc->{bcopts}) |
490 | ? join(',', @{$tc->{bcopts}}) : $tc->{bcopts}; |
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491 | |
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492 | foreach (qw( note prog code )) { |
493 | $buf .= " $_: $tc->{$_}" if $tc->{$_} and not ref $tc->{$_}; |
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494 | } |
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495 | return $tc->{name} = $buf; |
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496 | } |
497 | |
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498 | ################# |
499 | # render and its helpers |
500 | |
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501 | sub getRendering { |
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502 | my $tc = shift; |
503 | fail("getRendering: code or prog is required") |
504 | unless $tc->{code} or $tc->{prog}; |
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505 | |
19e169bf |
506 | my @opts = get_bcopts($tc); |
724aa791 |
507 | my $rendering = ''; # suppress "Use of uninitialized value in open" |
5e251bf1 |
508 | my @errs; # collect errs via |
509 | |
724aa791 |
510 | |
19e169bf |
511 | if ($tc->{prog}) { |
724aa791 |
512 | $rendering = runperl( switches => ['-w',join(',',"-MO=Concise",@opts)], |
19e169bf |
513 | prog => $tc->{prog}, stderr => 1, |
5e251bf1 |
514 | ); # verbose => 1); |
724aa791 |
515 | } else { |
19e169bf |
516 | my $code = $tc->{code}; |
724aa791 |
517 | unless (ref $code eq 'CODE') { |
19e169bf |
518 | # treat as source, and wrap into subref |
519 | # in caller's package ( to test arg-fixup, comment next line) |
520 | my $pkg = '{ package '.caller(1) .';'; |
3feb66e7 |
521 | { |
522 | no strict; |
523 | no warnings; |
524 | $code = eval "$pkg sub { $code } }"; |
525 | } |
5e251bf1 |
526 | # return errors |
19e169bf |
527 | if ($@) { chomp $@; push @errs, $@ } |
724aa791 |
528 | } |
529 | # set walk-output b4 compiling, which writes 'announce' line |
530 | walk_output(\$rendering); |
ab7e0f54 |
531 | |
724aa791 |
532 | my $opwalker = B::Concise::compile(@opts, $code); |
533 | die "bad BC::compile retval" unless ref $opwalker eq 'CODE'; |
534 | |
535 | B::Concise::reset_sequence(); |
536 | $opwalker->(); |
19e169bf |
537 | |
538 | # kludge error into rendering if its empty. |
539 | $rendering = $@ if $@ and ! $rendering; |
724aa791 |
540 | } |
19e169bf |
541 | # separate banner, other stuff whose printing order isnt guaranteed |
542 | if ($tc->{strip}) { |
5e251bf1 |
543 | $rendering =~ s/(B::Concise::compile.*?\n)//; |
19e169bf |
544 | print "stripped from rendering <$1>\n" if $1 and $tc->{stripv}; |
5e251bf1 |
545 | |
19e169bf |
546 | #while ($rendering =~ s/^(.*?(-e) line \d+\.)\n//g) { |
547 | while ($rendering =~ s/^(.*?(-e|\(eval \d+\).*?) line \d+\.)\n//g) { |
548 | print "stripped <$1> $2\n" if $tc->{stripv}; |
5e251bf1 |
549 | push @errs, $1; |
550 | } |
3731c1af |
551 | $rendering =~ s/-e syntax OK\n//; |
552 | $rendering =~ s/-e had compilation errors\.\n//; |
5e251bf1 |
553 | } |
19e169bf |
554 | $tc->{got} = $rendering; |
555 | $tc->{goterrs} = \@errs if @errs; |
5e251bf1 |
556 | return $rendering, @errs; |
724aa791 |
557 | } |
558 | |
559 | sub get_bcopts { |
560 | # collect concise passthru-options if any |
19e169bf |
561 | my ($tc) = shift; |
724aa791 |
562 | my @opts = (); |
19e169bf |
563 | if ($tc->{bcopts}) { |
564 | @opts = (ref $tc->{bcopts} eq 'ARRAY') |
565 | ? @{$tc->{bcopts}} : ($tc->{bcopts}); |
724aa791 |
566 | } |
567 | return @opts; |
568 | } |
569 | |
19e169bf |
570 | sub checkErrs { |
571 | # check rendering errs against expected errors, reduce and report |
572 | my $tc = shift; |
573 | |
574 | # check for agreement, by hash (order less important) |
575 | my (%goterrs, @got); |
3feb66e7 |
576 | $tc->{goterrs} ||= []; |
19e169bf |
577 | @goterrs{@{$tc->{goterrs}}} = (1) x scalar @{$tc->{goterrs}}; |
578 | |
579 | foreach my $k (keys %{$tc->{errs}}) { |
580 | if (@got = grep /^$k$/, keys %goterrs) { |
581 | delete $tc->{errs}{$k}; |
582 | delete $goterrs{$_} foreach @got; |
583 | } |
584 | } |
585 | $tc->{goterrs} = \%goterrs; |
586 | |
587 | # relook at altered |
588 | if (%{$tc->{errs}} or %{$tc->{goterrs}}) { |
589 | $tc->diag_or_fail(); |
590 | } |
3feb66e7 |
591 | fail("FORCED: $tc->{name}:\n") if $gOpts{fail}; # silly ? |
19e169bf |
592 | } |
593 | |
594 | sub diag_or_fail { |
595 | # help checkErrs |
596 | my $tc = shift; |
597 | |
598 | my @lines; |
599 | push @lines, "got unexpected:", sort keys %{$tc->{goterrs}} if %{$tc->{goterrs}}; |
600 | push @lines, "missed expected:", sort keys %{$tc->{errs}} if %{$tc->{errs}}; |
601 | |
602 | if (@lines) { |
603 | unshift @lines, $tc->{name}; |
604 | my $report = join("\n", @lines); |
605 | |
606 | if ($gOpts{report} eq 'diag') { _diag ($report) } |
607 | elsif ($gOpts{report} eq 'fail') { fail ($report) } |
608 | else { print ($report) } |
609 | next unless $gOpts{errcont}; # skip block |
610 | } |
611 | } |
612 | |
613 | =head1 mkCheckRex ($tc) |
5e251bf1 |
614 | |
19e169bf |
615 | It selects the correct golden-sample from the test-case object, and |
616 | converts it into a Regexp which should match against the original |
617 | golden-sample (used in selftest, see below), and on the renderings |
618 | obtained by applying the code on the perl being tested. |
619 | |
620 | The selection is driven by platform mostly, but also by test-mode, |
621 | which rather complicates the code. This is worsened by the potential |
622 | need to make platform specific conversions on the reftext. |
5e251bf1 |
623 | |
5e251bf1 |
624 | but is otherwise as strict as possible. For example, it should *not* |
625 | match when opcode flags change, or when optimizations convert an op to |
626 | an ex-op. |
627 | |
5e251bf1 |
628 | |
629 | =head2 match criteria |
630 | |
19e169bf |
631 | The selected golden-sample is massaged to eliminate various match |
632 | irrelevancies. This is done so that the tests dont fail just because |
633 | you added a line to the top of the test file. (Recall that the |
634 | renderings contain the program's line numbers). Similar cleanups are |
635 | done on "strings", hex-constants, etc. |
636 | |
637 | The need to massage is reflected in the 2 golden-sample approach of |
638 | the test-cases; we want the match to be as rigorous as possible, and |
639 | thats easier to achieve when matching against 1 input than 2. |
640 | |
5e251bf1 |
641 | Opcode arguments (text within braces) are disregarded for matching |
3c4b39be |
642 | purposes. This loses some info in 'add[t5]', but greatly simplifies |
5e251bf1 |
643 | matching 'nextstate(main 22 (eval 10):1)'. Besides, we are testing |
644 | for regressions, not for complete accuracy. |
645 | |
646 | The regex is anchored by default, but can be suppressed with |
647 | 'noanchors', allowing 1-liner tests to succeed if opcode is found. |
648 | |
649 | =cut |
650 | |
724aa791 |
651 | # needless complexity due to 'too much info' from B::Concise v.60 |
652 | my $announce = 'B::Concise::compile\(CODE\(0x[0-9a-f]+\)\)';; |
653 | |
654 | sub mkCheckRex { |
655 | # converts expected text into Regexp which should match against |
656 | # unaltered version. also adjusts threaded => non-threaded |
19e169bf |
657 | my ($tc, $want) = @_; |
724aa791 |
658 | eval "no re 'debug'"; |
659 | |
19e169bf |
660 | my $str = $tc->{expect} || $tc->{expect_nt}; # standard bias |
661 | $str = $tc->{$want} if $want && $tc->{$want}; # stated pref |
724aa791 |
662 | |
19e169bf |
663 | die("no '$want' golden-sample found: $tc->{name}") unless $str; |
724aa791 |
664 | |
19e169bf |
665 | $str =~ s/^\# //mg; # ease cut-paste testcase authoring |
666 | |
667 | if ($] < 5.009) { |
668 | # add 5.8 private flags, which bleadperl (5.9.1) doesn't have/use/render |
669 | # works because it adds no wildcards, which are butchered below.. |
670 | $str =~ s|(mapstart l?K\*?)|$1/2|mg; |
671 | $str =~ s|(grepstart l?K\*?)|$1/2|msg; |
672 | $str =~ s|(mapwhile.*? l?K)|$1/1|msg; |
673 | $str =~ s|(grepwhile.*? l?K)|$1/1|msg; |
674 | } |
675 | $tc->{wantstr} = $str; |
724aa791 |
676 | |
ab7e0f54 |
677 | # make targ args wild |
678 | $str =~ s/\[t\d+\]/[t\\d+]/msg; |
679 | |
cc02ea56 |
680 | # escape bracing, etc.. manual \Q (doesnt escape '+') |
681 | $str =~ s/([\[\]()*.\$\@\#\|{}])/\\$1/msg; |
ab7e0f54 |
682 | # $str =~ s/(?<!\\)([\[\]\(\)*.\$\@\#\|{}])/\\$1/msg; |
cc02ea56 |
683 | |
19e169bf |
684 | # treat dbstate like nextstate (no in-debugger false reports) |
cc02ea56 |
685 | $str =~ s/(?:next|db)state(\\\(.*?\\\))/(?:next|db)state(.*?)/msg; |
5e251bf1 |
686 | # widened for -terse mode |
687 | $str =~ s/(?:next|db)state/(?:next|db)state/msg; |
688 | |
cc02ea56 |
689 | # don't care about: |
690 | $str =~ s/:-?\d+,-?\d+/:-?\\d+,-?\\d+/msg; # FAKE line numbers |
691 | $str =~ s/match\\\(.*?\\\)/match\(.*?\)/msg; # match args |
692 | $str =~ s/(0x[0-9A-Fa-f]+)/0x[0-9A-Fa-f]+/msg; # hexnum values |
693 | $str =~ s/".*?"/".*?"/msg; # quoted strings |
724aa791 |
694 | |
19e169bf |
695 | $str =~ s/(\d refs?)/\\d+ refs?/msg; # 1 ref, 2+ refs (plural) |
5e251bf1 |
696 | $str =~ s/leavesub \[\d\]/leavesub [\\d]/msg; # for -terse |
19e169bf |
697 | #$str =~ s/(\s*)\n/\n/msg; # trailing spaces |
698 | |
19e169bf |
699 | croak "no reftext found for $want: $tc->{name}" |
724aa791 |
700 | unless $str =~ /\w+/; # fail unless a real test |
ab7e0f54 |
701 | |
724aa791 |
702 | # $str = '.*' if 1; # sanity test |
703 | # $str .= 'FAIL' if 1; # sanity test |
704 | |
cc02ea56 |
705 | # allow -eval, banner at beginning of anchored matches |
706 | $str = "(-e .*?)?(B::Concise::compile.*?)?\n" . $str |
19e169bf |
707 | unless $tc->{noanchors} or $tc->{rxnoorder}; |
cc02ea56 |
708 | |
19e169bf |
709 | my $qr = ($tc->{noanchors}) ? qr/$str/ms : qr/^$str$/ms ; |
724aa791 |
710 | no re 'debug'; |
711 | |
19e169bf |
712 | $tc->{rex} = $qr; |
713 | $tc->{rexstr} = $str; |
714 | $tc; |
724aa791 |
715 | } |
716 | |
19e169bf |
717 | ############## |
718 | # compare and report |
cc02ea56 |
719 | |
19e169bf |
720 | sub mylike { |
721 | # reworked mylike to use hash-obj |
722 | my $tc = shift; |
723 | my $got = $tc->{got}; |
724 | my $want = $tc->{rex}; |
725 | my $cmnt = $tc->{name}; |
726 | my $cross = $tc->{cross}; |
727 | |
728 | my $msgs = $tc->{msgs}; |
729 | my $retry = $tc->{retry}; # || $gopts{retry}; |
730 | my $debug = $tc->{debug}; #|| $gopts{retrydbg}; |
731 | |
732 | # bad is anticipated failure |
733 | my $bad = (0 or ( $cross && $tc->{crossfail}) |
734 | or (!$cross && $tc->{fail}) |
735 | or 0); # no undefs ! |
736 | |
737 | # same as A ^ B, but B has side effects |
738 | my $ok = ( $bad && unlike ($got, $want, $cmnt, @$msgs) |
739 | or !$bad && like ($got, $want, $cmnt, @$msgs)); |
740 | |
741 | reduceDiffs ($tc) if not $ok; |
742 | |
743 | if (not $ok and $retry) { |
744 | # redo, perhaps with use re debug - NOT ROBUST |
745 | eval "use re 'debug'" if $debug; |
746 | $ok = ( $bad && unlike ($got, $want, "(RETRY) $cmnt", @$msgs) |
747 | or !$bad && like ($got, $want, "(RETRY) $cmnt", @$msgs)); |
748 | eval "no re 'debug'"; |
749 | } |
750 | return $ok; |
751 | } |
724aa791 |
752 | |
19e169bf |
753 | sub reduceDiffs { |
754 | # isolate the real diffs and report them. |
755 | # i.e. these kinds of errs: |
756 | # 1. missing or extra ops. this skews all following op-sequences |
757 | # 2. single op diff, the rest of the chain is unaltered |
758 | # in either case, std err report is inadequate; |
759 | |
760 | my $tc = shift; |
761 | my $got = $tc->{got}; |
762 | my @got = split(/\n/, $got); |
763 | my $want = $tc->{wantstr}; |
764 | my @want = split(/\n/, $want); |
765 | |
766 | # split rexstr into units that should eat leading lines. |
767 | my @rexs = map qr/$_/, split (/\n/, $tc->{rexstr}); |
768 | |
769 | foreach my $rex (@rexs) { |
770 | my $exp = shift @want; |
771 | my $line = shift @got; |
772 | # remove matches, and report |
773 | unless ($got =~ s/($rex\n)//msg) { |
774 | _diag("got:\t\t'$line'\nwant:\t $rex\n"); |
775 | } |
776 | } |
777 | _diag("remainder:\n$got"); |
778 | _diag("these lines not matched:\n$got\n"); |
724aa791 |
779 | } |
780 | |
19e169bf |
781 | =head1 Global modes |
782 | |
783 | Unusually, this module also processes @ARGV for command-line arguments |
784 | which set global modes. These 'options' change the way the tests run, |
785 | essentially reusing the tests for different purposes. |
cc02ea56 |
786 | |
19e169bf |
787 | |
788 | |
789 | Additionally, there's an experimental control-arg interface (i.e. |
790 | subject to change) which allows the user to set global modes. |
791 | |
792 | |
793 | =head1 Testing Method |
794 | |
795 | At 1st, optreeCheck used one reference-text, but the differences |
796 | between Threaded and Non-threaded renderings meant that a single |
797 | reference (sampled from say, threaded) would be tricky and iterative |
798 | to convert for testing on a non-threaded build. Worse, this conflicts |
799 | with making tests both strict and precise. |
800 | |
801 | We now use 2 reference texts, the right one is used based upon the |
802 | build's threaded-ness. This has several benefits: |
803 | |
804 | 1. native reference data allows closer/easier matching by regex. |
805 | 2. samples can be eyeballed to grok T-nT differences. |
806 | 3. data can help to validate mkCheckRex() operation. |
3c4b39be |
807 | 4. can develop regexes which accommodate T-nT differences. |
19e169bf |
808 | 5. can test with both native and cross-converted regexes. |
809 | |
810 | Cross-testing (expect_nt on threaded, expect on non-threaded) exposes |
811 | differences in B::Concise output, so mkCheckRex has code to do some |
812 | cross-test manipulations. This area needs more work. |
813 | |
814 | =head1 Test Modes |
815 | |
816 | One consequence of a single-function API is difficulty controlling |
817 | test-mode. I've chosen for now to use a package hash, %gOpts, to store |
818 | test-state. These properties alter checkOptree() function, either |
819 | short-circuiting to selftest, or running a loop that runs the testcase |
820 | 2^N times, varying conditions each time. (current N is 2 only). |
821 | |
822 | So Test-mode is controlled with cmdline args, also called options below. |
823 | Run with 'help' to see the test-state, and how to change it. |
824 | |
825 | =head2 selftest |
826 | |
827 | This argument invokes runSelftest(), which tests a regex against the |
828 | reference renderings that they're made from. Failure of a regex match |
829 | its 'mold' is a strong indicator that mkCheckRex is buggy. |
830 | |
831 | That said, selftest mode currently runs a cross-test too, they're not |
832 | completely orthogonal yet. See below. |
833 | |
834 | =head2 testmode=cross |
835 | |
836 | Cross-testing is purposely creating a T-NT mismatch, looking at the |
837 | fallout, which helps to understand the T-NT differences. |
838 | |
839 | The tweaking appears contrary to the 2-refs philosophy, but the tweaks |
840 | will be made in conversion-specific code, which (will) handles T->NT |
841 | and NT->T separately. The tweaking is incomplete. |
842 | |
843 | A reasonable 1st step is to add tags to indicate when TonNT or NTonT |
844 | is known to fail. This needs an option to force failure, so the |
845 | test.pl reporting mechanics show results to aid the user. |
846 | |
847 | =head2 testmode=native |
848 | |
849 | This is normal mode. Other valid values are: native, cross, both. |
850 | |
851 | =head2 checkOptree Notes |
852 | |
853 | Accepts test code, renders its optree using B::Concise, and matches |
854 | that rendering against a regex built from one of 2 reference |
855 | renderings %tc data. |
856 | |
857 | The regex is built by mkCheckRex(\%tc), which scrubs %tc data to |
858 | remove match-irrelevancies, such as (args) and [args]. For example, |
859 | it strips leading '# ', making it easy to cut-paste new tests into |
860 | your test-file, run it, and cut-paste actual results into place. You |
861 | then retest and reedit until all 'errors' are gone. (now make sure you |
862 | haven't 'enshrined' a bug). |
863 | |
864 | name: The test name. May be augmented by a label, which is built from |
865 | important params, and which helps keep names in sync with whats being |
866 | tested. |
867 | |
868 | =cut |
869 | |
870 | sub runSelftest { |
871 | # tests the regex produced by mkCheckRex() |
872 | # by using on the expect* text it was created with |
873 | # failures indicate a code bug, |
874 | # OR regexs plugged into the expect* text (which defeat conversions) |
875 | my $tc = shift; |
876 | |
877 | for my $provenance (qw/ expect expect_nt /) { |
878 | #next unless $tc->{$provenance}; |
879 | |
880 | $tc->mkCheckRex($provenance); |
881 | $tc->{got} = $tc->{wantstr}; # fake the rendering |
882 | $tc->mylike(); |
883 | } |
884 | } |
885 | |
886 | my $dumploaded = 0; |
887 | |
888 | sub mydumper { |
889 | |
890 | do { Dumper(@_); return } if $dumploaded; |
891 | |
892 | eval "require Data::Dumper" |
893 | or do{ |
894 | print "Sorry, Data::Dumper is not available\n"; |
895 | print "half hearted attempt:\n"; |
3feb66e7 |
896 | foreach my $it (@_) { |
19e169bf |
897 | if (ref $it eq 'HASH') { |
898 | print " $_ => $it->{$_}\n" foreach sort keys %$it; |
899 | } |
900 | } |
901 | return; |
902 | }; |
903 | |
904 | Data::Dumper->import; |
905 | $Data::Dumper::Sortkeys = 1; |
906 | $dumploaded++; |
907 | Dumper(@_); |
908 | } |
909 | |
910 | ############################ |
cc02ea56 |
911 | # support for test writing |
912 | |
913 | sub preamble { |
914 | my $testct = shift || 1; |
915 | return <<EO_HEADER; |
916 | #!perl |
917 | |
918 | BEGIN { |
919 | chdir q(t); |
920 | \@INC = qw(../lib ../ext/B/t); |
921 | require q(./test.pl); |
922 | } |
923 | use OptreeCheck; |
924 | plan tests => $testct; |
925 | |
926 | EO_HEADER |
927 | |
928 | } |
929 | |
930 | sub OptreeCheck::wrap { |
931 | my $code = shift; |
932 | $code =~ s/(?:(\#.*?)\n)//gsm; |
933 | $code =~ s/\s+/ /mgs; |
934 | chomp $code; |
935 | return unless $code =~ /\S/; |
936 | my $comment = $1; |
937 | |
938 | my $testcode = qq{ |
939 | |
940 | checkOptree(note => q{$comment}, |
941 | bcopts => q{-exec}, |
942 | code => q{$code}, |
943 | expect => <<EOT_EOT, expect_nt => <<EONT_EONT); |
944 | ThreadedRef |
19e169bf |
945 | paste your 'golden-example' here, then retest |
cc02ea56 |
946 | EOT_EOT |
19e169bf |
947 | NonThreadedRef |
948 | paste your 'golden-example' here, then retest |
cc02ea56 |
949 | EONT_EONT |
950 | |
951 | }; |
952 | return $testcode; |
953 | } |
954 | |
955 | sub OptreeCheck::gentest { |
956 | my ($code,$opts) = @_; |
957 | my $rendering = getRendering({code => $code}); |
958 | my $testcode = OptreeCheck::wrap($code); |
959 | return unless $testcode; |
960 | |
961 | # run the prog, capture 'reference' concise output |
962 | my $preamble = preamble(1); |
963 | my $got = runperl( prog => "$preamble $testcode", stderr => 1, |
964 | #switches => ["-I../ext/B/t", "-MOptreeCheck"], |
965 | ); #verbose => 1); |
966 | |
967 | # extract the 'reftext' ie the got 'block' |
968 | if ($got =~ m/got \'.*?\n(.*)\n\# \'\n\# expected/s) { |
19e169bf |
969 | my $goldentxt = $1; |
cc02ea56 |
970 | #and plug it into the test-src |
971 | if ($threaded) { |
19e169bf |
972 | $testcode =~ s/ThreadedRef/$goldentxt/; |
cc02ea56 |
973 | } else { |
19e169bf |
974 | $testcode =~ s/NonThreadRef/$goldentxt/; |
cc02ea56 |
975 | } |
976 | my $b4 = q{expect => <<EOT_EOT, expect_nt => <<EONT_EONT}; |
977 | my $af = q{expect => <<'EOT_EOT', expect_nt => <<'EONT_EONT'}; |
978 | $testcode =~ s/$b4/$af/; |
979 | |
cc02ea56 |
980 | return $testcode; |
981 | } |
982 | return ''; |
983 | } |
984 | |
985 | |
986 | sub OptreeCheck::processExamples { |
987 | my @files = @_; |
19e169bf |
988 | |
989 | # gets array of paragraphs, which should be code-samples. Theyre |
990 | # turned into optreeCheck tests, |
cc02ea56 |
991 | |
992 | foreach my $file (@files) { |
993 | open (my $fh, $file) or die "cant open $file: $!\n"; |
994 | $/ = ""; |
995 | my @chunks = <$fh>; |
996 | print preamble (scalar @chunks); |
3feb66e7 |
997 | foreach my $t (@chunks) { |
cc02ea56 |
998 | print "\n\n=for gentest\n\n# chunk: $t=cut\n\n"; |
999 | print OptreeCheck::gentest ($t); |
1000 | } |
1001 | } |
1002 | } |
1003 | |
1004 | # OK - now for the final insult to your good taste... |
1005 | |
1006 | if ($0 =~ /OptreeCheck\.pm/) { |
1007 | |
1008 | #use lib 't'; |
1009 | require './t/test.pl'; |
1010 | |
1011 | # invoked as program. Work like former gentest.pl, |
1012 | # ie read files given as cmdline args, |
1013 | # convert them to usable test files. |
1014 | |
1015 | require Getopt::Std; |
1016 | Getopt::Std::getopts('') or |
1017 | die qq{ $0 sample-files* # no options |
1018 | |
1019 | expecting filenames as args. Each should have paragraphs, |
1020 | these are converted to checkOptree() tests, and printed to |
1021 | stdout. Redirect to file then edit for test. \n}; |
1022 | |
1023 | OptreeCheck::processExamples(@ARGV); |
1024 | } |
1025 | |
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1026 | 1; |
1027 | |
1028 | __END__ |
1029 | |
cc02ea56 |
1030 | =head1 TEST DEVELOPMENT SUPPORT |
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1031 | |
cc02ea56 |
1032 | This optree regression testing framework needs tests in order to find |
1033 | bugs. To that end, OptreeCheck has support for developing new tests, |
1034 | according to the following model: |
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1035 | |
cc02ea56 |
1036 | 1. write a set of sample code into a single file, one per |
19e169bf |
1037 | paragraph. Add <=for gentest> blocks if you care to, or just look at |
1038 | f_map and f_sort in ext/B/t/ for examples. |
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1039 | |
cc02ea56 |
1040 | 2. run OptreeCheck as a program on the file |
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1041 | |
cc02ea56 |
1042 | ./perl -Ilib ext/B/t/OptreeCheck.pm -w ext/B/t/f_map |
1043 | ./perl -Ilib ext/B/t/OptreeCheck.pm -w ext/B/t/f_sort |
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1044 | |
cc02ea56 |
1045 | gentest reads the sample code, runs each to generate a reference |
1046 | rendering, folds this rendering into an optreeCheck() statement, |
1047 | and prints it to stdout. |
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1048 | |
cc02ea56 |
1049 | 3. run the output file as above, redirect to files, then rerun on |
1050 | same build (for sanity check), and on thread-opposite build. With |
1051 | editor in 1 window, and cmd in other, it's fairly easy to cut-paste |
1052 | the gots into the expects, easier than running step 2 on both |
1053 | builds then trying to sdiff them together. |
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1054 | |
5e251bf1 |
1055 | =head1 CAVEATS |
1056 | |
1057 | This code is purely for testing core. While checkOptree feels flexible |
1058 | enough to be stable, the whole selftest framework is subject to change |
1059 | w/o notice. |
1060 | |
724aa791 |
1061 | =cut |