Stress test unwind()

[perl/modules/Scope-Upper.git] / t / 85-stress-unwind.t

diff --git a/t/85-stress-unwind.t b/t/85-stress-unwind.t
new file mode 100644 (file)
index 0000000..75bad3e
--- /dev/null
+++ b/t/85-stress-unwind.t
@@ -0,0 +1,87 @@
+#!perl -T
+
+use strict;
+use warnings;
+
+use Test::More 'no_plan';
+
+use Scope::Upper qw/unwind/;
+
+our ($call, @args, $args);
+
+$call = sub {
+ my ($height, $level, $i) = @_;
+ return [ [ "unwind(\@args => $level)\n", '' ] ];
+};
+
+sub list { @_ }
+
+my @blocks = (
+ [ 'sub {',     '}->()' ],
+ [ 'eval {',    '}' ],
+);
+
+my @contexts = (
+ [ '',        '; ()' ],
+ [ 'scalar(', ')' ],
+ [ 'list(',   ')' ],
+);
+
+@blocks   = map [ map "$_\n", @$_ ], @blocks;
+@contexts = map [ map "$_\n", @$_ ], @contexts;
+
+sub gen {
+ my ($height, $level, $i) = @_;
+ push @_, $i = 0 if @_ == 2;
+ my @res;
+ my $up = $i == $height + 1 ? $call->(@_) : gen($height, $level, $i + 1);
+ if ($i + $level == $height + 1) {
+  for (@$up) {
+   $_->[1] = "return($args)\n";
+  }
+ }
+ for my $base (@$up) {
+  my ($code, $exp) = @$base;
+  for my $blk (@blocks) {
+   for my $cx (@contexts) {
+    push @res, [
+     $blk->[0] . $cx->[0] . $code . $cx->[1] . $blk->[1],
+     $blk->[0] . $cx->[0] . $exp .  $cx->[1] . $blk->[1],
+    ];
+    my $list = join ', ', map { int rand 10 } 0 .. rand 3;
+    push @res, [
+     $blk->[0] . $cx->[0] . "($list, " . $code . ')' . $cx->[1] . $blk->[1],
+     $blk->[0] . $cx->[0] . "($list, " . $exp .  ')' . $cx->[1] . $blk->[1],
+    ];
+   }
+  }
+ }
+ return \@res;
+}
+
+sub runtests {
+ my $tests = gen @_;
+ for (@$tests) {
+  no warnings 'void';
+  my @res = eval $_->[0];
+  my @exp = eval $_->[1] unless $@;
+  if ($@ || !is_deeply \@res, \@exp) {
+   diag "=== vvv Test vvv ===";
+   diag $_->[0];
+   diag "------- Got --------";
+   diag join(', ', map { defined($_) ? $_ : '(undef)' } @res);
+   diag "----- Expected -----";
+   diag join(', ', map { defined($_) ? $_ : '(undef)' } @exp);
+   diag "=== ^^^^^^^^^^^^ ===";
+  }
+ }
+}
+
+for ([ ], [ 'A' ], [ qw/B C/ ]) {
+ @args = @$_;
+ $args = '(' . join(', ', map "'$_'", @args) . ')';
+ runtests 0, 0;
+ runtests 0, 1;
+ runtests 1, 0;
+ runtests 1, 1;
+}