[PATCH v3 2/2] kernel32/tests: resource: Replicate muirct.exe behavior

[Jon Doron]

For some reason muirct.exe is aware of the opaque structure used by
BeginUpdateResource, it access the filename field of the opaque structure
during it's processing.

MS documentation for the muirct utility:
https://docs.microsoft.com/en-us/windows/desktop/intl/resource-utilities

Sample execution:
MUIRCT.EXE -c "ui.exe" -e "de-DE\ui.exe.mui"

Signed-off-by: Jon Doron <arilou at gmail.com>
---
 dlls/kernel32/tests/resource.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/dlls/kernel32/tests/resource.c b/dlls/kernel32/tests/resource.c
index 74066cfba3..c3959d2096 100644
--- a/dlls/kernel32/tests/resource.c
+++ b/dlls/kernel32/tests/resource.c
@@ -24,6 +24,7 @@
 #include "wine/test.h"
 
 static const char filename[] = "test_.exe";
+static const WCHAR filenameW[] = {'t','e','s','t','_','.','e','x','e',0};
 static DWORD GLE;
 
 enum constants {
@@ -463,6 +464,28 @@ static void test_find_resource(void)
     ok( GetLastError() == ERROR_RESOURCE_LANG_NOT_FOUND, "wrong error %u\n", GetLastError() );
 }
 
+static void test_resource_internal_structure_offsets(void)
+{
+    HANDLE res;
+    void *res_data;
+    WCHAR *res_filenameW;
+
+    res = BeginUpdateResourceW( (PWCHAR)filenameW, FALSE );
+    ok( res != NULL, "BeginUpdateResourceW failed\n" );
+    res_data = GlobalLock(res);
+    ok( res_data != NULL, "GlobalLock failed\n" );
+#ifdef _WIN64
+    res_filenameW = (PWCHAR)GlobalLock( *(HGLOBAL*)((ULONG_PTR)res_data + 0x30) );
+#else
+    res_filenameW = (PWCHAR)GlobalLock( *(HGLOBAL*)((ULONG_PTR)res_data + 0x18) );
+#endif
+    ok( res_filenameW != NULL, "GlobalLock for res_filenameW failed\n" );
+    ok( !lstrcmpW(res_filenameW, (PWCHAR)filenameW), "Filename fields do not match\n" );
+    ok( GlobalUnlock( res_filenameW ), "GlobalUnlock res_filenamed failed\n" );
+    ok( GlobalUnlock( res_data ), "GlobalUnlock res_data failed\n" );
+    ok( EndUpdateResourceW( res, TRUE ), "EndUpdateResourceW failed\n");
+}
+
 START_TEST(resource)
 {
     DWORD i;
@@ -482,6 +505,7 @@ START_TEST(resource)
     {
         const struct _sec_variants *sec = &sec_variants[i];
         build_exe( &sec->build );
+        test_resource_internal_structure_offsets();
         update_resources_none();
         check_exe( &sec->chk_none );
         update_resources_delete();
-- 
2.17.1