TEST_INCLUDE_FILE: Replace with TEST_INCLUDE_FILES

The TEST_INCLUDE_FILE directory property got deprecated in CMake 3.10
and TEST_INCLUDE_FILES should be used instead.

CMakeLists.txt

@@ -392,8 +392,8 @@ include(Source/CMakeVersion.cmake)
 include(CTest)
 
 # Set up test-time configuration.
-set_directory_properties(PROPERTIES
-  TEST_INCLUDE_FILE "${CMake_BINARY_DIR}/Tests/EnforceConfig.cmake")
+set_property(DIRECTORY APPEND PROPERTY
+  TEST_INCLUDE_FILES "${CMake_BINARY_DIR}/Tests/EnforceConfig.cmake")
 
 if(NOT CMake_TEST_EXTERNAL_CMAKE)
   # where to write the resulting executables and libraries

Tests/RunCMake/CTest/TestfileErrors.cmake

@@ -1,3 +1,3 @@
 include(CTest)
 add_test(NAME "unreachable" COMMAND ${CMAKE_COMMAND} -E true)
-set_property(DIRECTORY PROPERTY TEST_INCLUDE_FILE ${CMAKE_CURRENT_SOURCE_DIR}/TestfileErrors-Script.cmake)
+set_property(DIRECTORY APPEND PROPERTY TEST_INCLUDE_FILES "${CMAKE_CURRENT_SOURCE_DIR}/TestfileErrors-Script.cmake")