Tests: Simplify RunCMake.cmake_language invalid command cases

Tests/RunCMake/cmake_language/CallInvalidCommand.cmake

@@ -1,2 +0,0 @@
-
-cmake_language(CALL ${COMMAND})

Tests/RunCMake/cmake_language/RunCMakeTest.cmake

@@ -2,7 +2,16 @@ include(RunCMake)
 
 run_cmake(no_parameters)
 run_cmake(unknown_meta_operation)
-run_cmake(call_invalid_command)
+foreach(command IN ITEMS
+    "function" "ENDFUNCTION"
+    "macro" "endMACRO"
+    "if" "elseif" "else" "endif"
+    "while" "endwhile"
+    "foreach" "endforeach"
+    )
+  message(STATUS "Running call_invalid_command for ${command}...")
+  run_cmake_with_options(call_invalid_command -Dcommand=${command})
+endforeach()
 run_cmake(call_valid_command)
 run_cmake(call_double_evaluation)
 run_cmake(call_expanded_command)

Tests/RunCMake/cmake_language/call_invalid_command-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/cmake_language/call_invalid_command-stderr.txt

@@ -0,0 +1,4 @@
+^CMake Error at call_invalid_command.cmake:1 \(cmake_language\):
+  cmake_language invalid command specified: [A-Za-z_]+
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)$

Tests/RunCMake/cmake_language/call_invalid_command.cmake

@@ -1,14 +1 @@
-
-foreach (command IN ITEMS "function" "ENDFUNCTION"
-                          "macro" "endMACRO"
-                          "if" "elseif" "else" "endif"
-                          "while" "endwhile"
-                          "foreach" "endforeach")
-  execute_process(COMMAND "${CMAKE_COMMAND}" -DCOMMAND=${command}
-    -P "${CMAKE_CURRENT_SOURCE_DIR}/CallInvalidCommand.cmake"
-    OUTPUT_QUIET ERROR_QUIET
-    RESULT_VARIABLE result)
-  if (NOT result)
-    message (SEND_ERROR "cmake_language(CALL ${command}) unexpectedly successful.")
-  endif()
-endforeach()
+cmake_language(CALL ${command})