ralloc: Add some basic unit tests.

I started writing unit tests for a new piece of code, and discovered
they all failed due to a bug in ralloc.  Clearly it needs a test suite.

v2: Rename to 'ralloc-test' and fix copyright date.  (idr review)

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>

src/glsl/tests/.gitignore

@@ -1,2 +1,3 @@
 Makefile
+ralloc_test
 uniform-initializer-test

src/glsl/tests/Makefile.am

@@ -9,9 +9,11 @@ AM_CXXFLAGS = $(INC)
 
 TESTS = \
 	optimization-test \
+	ralloc-test \
 	uniform-initializer-test
 
 check_PROGRAMS = 				\
+	ralloc-test				\
 	uniform-initializer-test
 
 uniform_initializer_test_SOURCES =		\
@@ -24,3 +26,6 @@ uniform_initializer_test_LDADD =		\
 	$(top_builddir)/src/glsl/libglsl.a	\
 	$(top_builddir)/src/mesa/libmesa.a	\
 	-lpthread
+
+ralloc_test_SOURCES = ralloc_test.cpp $(top_builddir)/src/glsl/ralloc.c
+ralloc_test_LDADD = $(top_builddir)/src/gtest/libgtest.la -lpthread

src/glsl/tests/ralloc_test.cpp

@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include <gtest/gtest.h>
+#include <string.h>
+
+#include "ralloc.h"
+
+/**
+ * \name Basic functionality
+ */
+/*@{*/
+TEST(ralloc_test, null_parent)
+{
+   void *mem_ctx = ralloc_context(NULL);
+
+   EXPECT_EQ(NULL, ralloc_parent(mem_ctx));
+}
+/*@}*/