1 files changed, 61 insertions, 0 deletions
diff --git a/test/unit/socket.c b/test/unit/socket.c
new file mode 100644
index 0000000..c4edea0
--- /dev/null
+++ b/test/unit/socket.c
@@ -0,0 +1,61 @@
+/*
+ **********************************************************************
+ * Copyright (C) Luke Valenta  2023
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * 
+ **********************************************************************
+ */
+
+#include <socket.c>
+#include "test.h"
+
+static void
+test_preinitialise(void)
+{
+#ifdef LINUX
+  /* Test LISTEN_FDS environment variable parsing */
+
+  /* normal */
+  putenv("LISTEN_FDS=2");
+  SCK_PreInitialise();
+  TEST_CHECK(reusable_fds == 2);
+
+  /* negative */
+  putenv("LISTEN_FDS=-2");
+  SCK_PreInitialise();
+  TEST_CHECK(reusable_fds == 0);
+
+  /* trailing characters */
+  putenv("LISTEN_FDS=2a");
+  SCK_PreInitialise();
+  TEST_CHECK(reusable_fds == 0);
+
+  /* non-integer */
+  putenv("LISTEN_FDS=a2");
+  SCK_PreInitialise();
+  TEST_CHECK(reusable_fds == 0);
+
+  /* not set */
+  unsetenv("LISTEN_FDS");
+  SCK_PreInitialise();
+  TEST_CHECK(reusable_fds == 0);
+#endif
+}
+
+void
+test_unit(void)
+{
+  test_preinitialise();
+}