1 files changed, 31 insertions, 0 deletions
diff --git a/t/lib/cygwin.t b/t/lib/cygwin.t
new file mode 100644
index 0000000000..0148546143
--- /dev/null
+++ b/t/lib/cygwin.t
@@ -0,0 +1,31 @@
+#!perl
+
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = ('../lib');
+    unless ($^O eq "cygwin") {
+	print "1..0 # skipped: cygwin specific test\n";
+	exit 0;
+    }
+}
+
+use Test::More tests => 4;
+
+is(Cygwin::winpid_to_pid(Cygwin::pid_to_winpid($$)), $$,
+   "perl pid translates to itself");
+
+my $parent = getppid;
+SKIP: {
+    skip "test not run from cygwin process", 1 if $parent <= 1;
+    is(Cygwin::winpid_to_pid(Cygwin::pid_to_winpid($parent)), $parent,
+       "parent pid translates to itself");
+}
+
+my $catpid = open my $cat, "|cat" or die "Couldn't cat: $!";
+open my $ps, "ps|" or die "Couldn't do ps: $!";
+my ($catwinpid) = map /^.\s+$catpid\s+\d+\s+\d+\s+(\d+)/, <$ps>;
+close($ps);
+
+is(Cygwin::winpid_to_pid($catwinpid), $catpid, "winpid to pid");
+is(Cygwin::pid_to_winpid($catpid), $catwinpid, "pid to winpid");
+close($cat);