Cycles: Add regression test for util_md5_string

intern/cycles/test/CMakeLists.txt

@@ -34,6 +34,7 @@ set(SRC
   render_graph_finalize_test.cpp
   util_aligned_malloc_test.cpp
   util_math_test.cpp
+  util_md5_test.cpp
   util_path_test.cpp
   util_string_test.cpp
   util_task_test.cpp

intern/cycles/test/util_md5_test.cpp

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#include "testing/testing.h"
+
+#include "util/md5.h"
+
+CCL_NAMESPACE_BEGIN
+
+TEST(util, util_md5_string)
+{
+  /* The hash is calculated using `echo -n "Hello, World\!" | md5 | tr '[:lower:]' '[:upper:]'`. */
+  EXPECT_EQ(util_md5_string("Hello, World!"), "65A8E27D8879283831B664BD8B7F0AD4");
+}
+
+CCL_NAMESPACE_END