tests: do not compile tests for the uncompressed codec if it is not e…

…nabled

tests/CMakeLists.txt

@@ -16,7 +16,7 @@ endmacro()
 # --- tests that require access to internal symbols
 
 if (WITH_REDUCED_VISIBILITY)
-    message("Conversion and JPEG 2000 box unit tests can only be compiled with full symbol visibility (WITH_REDUCED_VISIBILITY=OFF)")
+    message(WARNING "Conversion and JPEG 2000 box unit tests can only be compiled with full symbol visibility (WITH_REDUCED_VISIBILITY=OFF)")
 else()
     add_libheif_test(conversion)
     add_libheif_test(jpeg2000)
@@ -26,6 +26,10 @@ endif()
 
 add_libheif_test(encode)
 add_libheif_test(region)
-add_libheif_test(uncompressed_decode)
-add_libheif_test(uncompressed_encode)
 
+if (WITH_UNCOMPRESSED_CODEC)
+    add_libheif_test(uncompressed_decode)
+    add_libheif_test(uncompressed_encode)
+else()
+    message(WARNING "Tests of the 'uncompressed codec' are not compiled because the uncompressed codec is not enabled (WITH_UNCOMPRESSED_CODEC==OFF)")
+endif ()