REx engine improvements

[p5sagit/p5-mst-13.2.git] / t / op / regexp.t

diff --git a/t/op/regexp.t b/t/op/regexp.t
old mode 100644 (file)
new mode 100755 (executable)
index 92f084a..66b2d1c
--- a/t/op/regexp.t
+++ b/t/op/regexp.t
@@ -1,33 +1,104 @@
 #!./perl
 
-# $Header: regexp.t,v 4.0 91/03/20 01:54:22 lwall Locked $
+# XXX known to leak scalars
+$ENV{PERL_DESTRUCT_LEVEL} = 0 unless $ENV{PERL_DESTRUCT_LEVEL} > 3;
+
+# The tests are in a separate file 't/op/re_tests'.
+# Each line in that file is a separate test.
+# There are five columns, separated by tabs.
+#
+# Column 1 contains the pattern, optionally enclosed in C<''>.
+# Modifiers can be put after the closing C<'>.
+#
+# Column 2 contains the string to be matched.
+#
+# Column 3 contains the expected result:
+#      y       expect a match
+#      n       expect no match
+#      c       expect an error
+#      B       test exposes a known bug in Perl, should be skipped
+#      b       test exposes a known bug in Perl, should be skipped if noamp
+#
+# Columns 4 and 5 are used only if column 3 contains C<y> or C<c>.
+#
+# Column 4 contains a string, usually C<$&>.
+#
+# Column 5 contains the expected result of double-quote
+# interpolating that string after the match, or start of error message.
+#
+# \n in the tests are interpolated, as are variables of the form ${\w+}.
+#
+# If you want to add a regular expression test that can't be expressed
+# in this format, don't add it here: put it in op/pat.t instead.
+
+BEGIN {
+    chdir 't' if -d 't';
+    unshift @INC, '../lib' if -d '../lib';
+}
+
+$iters = shift || 1;           # Poor man performance suite, 10000 is OK.
+
+open(TESTS,'op/re_tests') || open(TESTS,'t/op/re_tests') ||
+       die "Can't open re_tests";
 
-open(TESTS,'op/re_tests') || open(TESTS,'t/op/re_tests')
-    || die "Can't open re_tests";
 while (<TESTS>) { }
 $numtests = $.;
-close(TESTS);
+seek(TESTS,0,0);
+$. = 0;
 
-print "1..$numtests\n";
-open(TESTS,'op/re_tests') || open(TESTS,'t/op/re_tests')
-    || die "Can't open re_tests";
+$bang = sprintf "\\%03o", ord "!"; # \41 would not be portable.
+
+$| = 1;
+print "1..$numtests\n# $iters iterations\n";
+TEST:
 while (<TESTS>) {
-    ($pat, $subject, $result, $repl, $expect) = split(/[\t\n]/,$_);
+    chomp;
+    s/\\n/\n/g;
+    ($pat, $subject, $result, $repl, $expect) = split(/\t/,$_);
     $input = join(':',$pat,$subject,$result,$repl,$expect);
-    eval "\$match = (\$subject =~ \$pat); \$got = \"$repl\";";
-    if ($result eq 'c') {
-       if ($@ ne '') {print "ok $.\n";} else {print "not ok $.\n";}
-    }
-    elsif ($result eq 'n') {
-       if (!$match) {print "ok $.\n";} else {print "not ok $. $input => $got\n";}
-    }
-    else {
-       if ($match && $got eq $expect) {
-           print "ok $.\n";
+    infty_subst(\$pat);
+    infty_subst(\$expect);
+    $pat = "'$pat'" unless $pat =~ /^[:']/;
+    $pat =~ s/\\n/\n/g;
+    $pat =~ s/(\$\{\w+\})/$1/eeg;
+    $subject =~ s/\\n/\n/g;
+    $expect =~ s/\\n/\n/g;
+    $expect = $repl = '-' if $skip_amp and $input =~ /\$[&\`\']/;
+    $skip = ($skip_amp ? ($result =~ s/B//i) : ($result =~ s/B//));
+    $result =~ s/B//i unless $skip;
+    for $study ('', 'study \$subject') {
+       $c = $iters;
+       eval "$study; \$match = (\$subject =~ m$pat) while \$c--; \$got = \"$repl\";";
+       chomp( $err = $@ );
+       if ($result eq 'c') {
+           if ($err !~ m!^\Q$expect!) { print "not ok $. (compile) $input => `$err'\n"; next TEST }
+           last;  # no need to study a syntax error
+       }
+       elsif ( $skip ) {
+           print "ok $. # Skipped: not fixed yet\n"; next TEST;
+       }
+       elsif ($@) {
+           print "not ok $. $input => error `$err'\n"; next TEST;
+       }
+       elsif ($result eq 'n') {
+           if ($match) { print "not ok $. ($study) $input => false positive\n"; next TEST }
        }
        else {
-           print "not ok $. $input => $got\n";
+           if (!$match || $got ne $expect) {
+               print "not ok $. ($study) $input => `$got', match=$match\n";
+               next TEST;
+           }
        }
     }
+    print "ok $.\n";
 }
+
 close(TESTS);
+
+sub infty_subst                             # Special-case substitution
+{                                           #  of $reg_infty and friends
+    my $tp = shift;
+    $$tp =~ s/,\$reg_infty_m}/,$reg_infty_m}/o;
+    $$tp =~ s/,\$reg_infty_p}/,$reg_infty_p}/o;
+    $$tp =~ s/,\$reg_infty}/,$reg_infty}/o;
+}