1 files changed, 49 insertions, 0 deletions
diff --git a/t/006_next_free_port.t b/t/006_next_free_port.t
new file mode 100644
index 0000000..cb6c2f0
--- /dev/null
+++ b/t/006_next_free_port.t
@@ -0,0 +1,49 @@
+# Check PgCommon's next_free_port()
+
+use strict; 
+
+use lib '.';
+use PgCommon;
+
+use lib 't';
+use TestLib;
+
+use Test::More tests => 5;
+
+# test next_free_port(). We are intentionally using nc as an external tool,
+# using perl would replicate what next_free_port is doing, and that would
+# be a pointless test.
+use IPC::Open2;
+use Time::HiRes qw(usleep);
+my @pids;
+# no ports open
+is (next_free_port, 5432, 'next_free_port is 5432');
+
+# open a localhost ipv4 socket
+push @pids, open2(\*CHLD_OUT, \*CHLD_IN, qw(nc -4 -l 127.0.0.1 5432));
+usleep 2*$delay;
+is (next_free_port, 5433, 'next_free_port detects localhost ipv4 socket');
+# open a wildcard ipv4 socket
+push @pids, open2(\*CHLD_OUT, \*CHLD_IN, qw(nc -4 -l 5433));
+usleep $delay;
+is (next_free_port, 5434, 'next_free_port detects wildcard ipv4 socket');
+
+SKIP: {
+    $^V =~ /^v(\d+\.\d+)/; # parse perl version
+    skip "perl <= 5.10 does not have proper IPv6 support", 2 if ($1 <= 5.10);
+    skip "skipping IPv6 tests", 2 if ($ENV{SKIP_IPV6});
+
+    # open a localhost ipv6 socket
+    push @pids, open2(\*CHLD_OUT, \*CHLD_IN, qw(nc -6 -l ::1 5434));
+    usleep $delay;
+    is (next_free_port, 5435, 'next_free_port detects localhost ipv6 socket');
+    # open a wildcard ipv6 socket
+    push @pids, open2(\*CHLD_OUT, \*CHLD_IN, qw(nc -6 -l 5435));
+    usleep $delay;
+    is (next_free_port, 5436, 'next_free_port detects wildcard ipv6 socket');
+}
+
+# clean up
+kill 15, @pids;
+
+# vim: filetype=perl