From c0680e8a3aecdf686223a97811e68b585eb25df7 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Wed, 19 Dec 2012 12:12:04 -0500
Subject: Add some basic reference counting tests.

---
 libdimension/tests/Makefile.am |  4 +++
 libdimension/tests/refcount.c  | 72 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 libdimension/tests/refcount.c

diff --git a/libdimension/tests/Makefile.am b/libdimension/tests/Makefile.am
index 0673023..bcfa2c6 100644
--- a/libdimension/tests/Makefile.am
+++ b/libdimension/tests/Makefile.am
@@ -26,6 +26,7 @@ check_PROGRAMS    = warning.test                                               \
                     warning-as-error.test                                      \
                     error.test                                                 \
                     custom-error-fn.test                                       \
+                    refcount.test                                              \
                     dictionary.test                                            \
                     polynomial.test                                            \
                     prtree.test                                                \
@@ -73,6 +74,9 @@ error_test_LDADD   = libdimension-tests.la
 custom_error_fn_test_SOURCES = custom-error-fn.c
 custom_error_fn_test_LDADD   = libdimension-tests.la
 
+refcount_test_SOURCES = refcount.c
+refcount_test_LDADD   = libdimension-unit-test.la
+
 dictionary_test_SOURCES = dictionary.c
 dictionary_test_LDADD   = libdimension-unit-test.la
 
diff --git a/libdimension/tests/refcount.c b/libdimension/tests/refcount.c
new file mode 100644
index 0000000..efceacd
--- /dev/null
+++ b/libdimension/tests/refcount.c
@@ -0,0 +1,72 @@
+/*************************************************************************
+ * Copyright (C) 2012 Tavian Barnes <tavianator@tavianator.com>          *
+ *                                                                       *
+ * This file is part of The Dimension Test Suite.                        *
+ *                                                                       *
+ * The Dimension Test Suite is free software; you can redistribute it    *
+ * and/or modify it under the terms of the GNU General Public License as *
+ * published by the Free Software Foundation; either version 3 of the    *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Test Suite 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, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+/**
+ * @file
+ * Tests for the reference counting implementation.
+ */
+
+#include "dimension-internal.h"
+#include "tests.h"
+
+typedef struct dmnsn_foo {
+  DMNSN_REFCOUNT;
+} dmnsn_foo;
+
+static dmnsn_foo *
+dmnsn_new_foo(void)
+{
+  dmnsn_foo *foo = dmnsn_malloc(sizeof(dmnsn_foo));
+  DMNSN_REFCOUNT_INIT(foo);
+  return foo;
+}
+
+static void
+dmnsn_delete_foo(dmnsn_foo *foo)
+{
+  if (DMNSN_DECREF(foo)) {
+    dmnsn_free(foo);
+  }
+}
+
+static dmnsn_foo dmnsn_global_foo = {
+  DMNSN_REFCOUNT_INITIALIZER,
+};
+
+DMNSN_TEST(refcount, inc_dec)
+{
+  dmnsn_foo *foo = dmnsn_new_foo();
+  DMNSN_INCREF(foo);
+  dmnsn_delete_foo(foo);
+  dmnsn_delete_foo(foo);
+}
+
+DMNSN_TEST(refcount, decref_null)
+{
+  dmnsn_foo *foo = NULL;
+  ck_assert(!DMNSN_DECREF(foo));
+}
+
+DMNSN_TEST(refcount, global)
+{
+  /* Suppress "address will always evaluate to true" warning */
+  dmnsn_foo *global = &dmnsn_global_foo;
+  DMNSN_INCREF(global);
+  ck_assert(!DMNSN_DECREF(global));
+}
-- 
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