Distinguish library test config types based on sources

Author: FeignClaims

src/Tests.cmake

@@ -31,8 +31,13 @@ function(_configure_target target_name type)
     add_executable(${target_name})
     set(scope PRIVATE)
   elseif(${type} STREQUAL "test_config")
-    add_library(${target_name} INTERFACE)
-    set(scope INTERFACE)
+    if(args_SOURCES)
+      add_library(${target_name} STATIC)
+      set(scope PUBLIC)
+    else()
+      add_library(${target_name} INTERFACE)
+      set(scope INTERFACE)
+    endif()
   endif()
 
   target_sources(${target_name}