Adding unit test for struct packing

svn-id: r23570

1 files changed, 36 insertions, 0 deletions

diff --git a/test/common/pack.h b/test/common/pack.h
new file mode 100644
index 0000000000..a46a2a98b8
--- /dev/null
+++ b/test/common/pack.h
@@ -0,0 +1,36 @@
+#include <cxxtest/TestSuite.h>
+
+#include "common/stdafx.h"
+#include "common/scummsys.h"
+
+#include <common/pack-start.h>	// START STRUCT PACKING
+
+struct TestStruct {
+	uint32 x;
+	byte y;
+	uint16 z;
+	uint32 a;
+	byte b;
+};
+
+#include <common/pack-end.h>	// END STRUCT PACKING
+
+#define OFFS(type,item) (int)(&((type*)0)->type::item)
+
+class PackTestSuite : public CxxTest::TestSuite
+{
+	public:
+	void test_packing( void )
+	{
+		TS_ASSERT_EQUALS( sizeof(TestStruct), 4+1+2+4+1 );
+	}
+
+	void test_offsets( void )
+	{
+		TS_ASSERT_EQUALS( OFFS(TestStruct, x), 0 );
+		TS_ASSERT_EQUALS( OFFS(TestStruct, y), 4 );
+		TS_ASSERT_EQUALS( OFFS(TestStruct, z), 5 );
+		TS_ASSERT_EQUALS( OFFS(TestStruct, a), 7 );
+		TS_ASSERT_EQUALS( OFFS(TestStruct, b), 11 );
+	}
+};