Update testing.h

Add support to include CMocka headers, but not enable memory
checks.

dse/testing.h

@@ -5,8 +5,8 @@
 #ifndef DSE_TESTING_H_
 #define DSE_TESTING_H_
 
-#ifdef UNIT_TESTING
 
+#if defined(UNIT_TESTING) || defined(CMOCKA_TESTING)
 
 #include <stdarg.h>
 #include <stddef.h>
@@ -18,6 +18,8 @@
 #include <cmocka.h>
 
 
+#if defined(UNIT_TESTING)  // Enables memory checks in CMocka includes.
+
 /* Wrapping strdup() to get memory checking does not work with libyaml (and
  * perhaps other libs too). Therefore, rather than wrapping we can use the
  * preprocessor to swap strdup with this implementation in DSE code only.
@@ -32,7 +34,8 @@ static inline char *dse_strdup_swap(const char *s)
 }
 #define strdup dse_strdup_swap
 
-
 #endif  // UNIT_TESTING
 
+#endif  // UNIT_TESTING || CMOCKA_TESTING
+
 #endif  // DSE_TESTING_H_