math: Add RunCMake.math test to prepare for error cases

Tests/RunCMake/CMakeLists.txt

@@ -238,6 +238,7 @@ add_RunCMake_test(include)
 add_RunCMake_test(include_directories)
 add_RunCMake_test(include_guard)
 add_RunCMake_test(list)
+add_RunCMake_test(math)
 add_RunCMake_test(message)
 add_RunCMake_test(project -DCMake_TEST_RESOURCES=${CMake_TEST_RESOURCES})
 add_RunCMake_test(return)

Tests/RunCMake/math/CMakeLists.txt

@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 2.8.4)
+project(${RunCMake_TEST} NONE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/math/MATH.cmake

@@ -0,0 +1,9 @@
+macro(math_test expression expected)
+    math(EXPR evaluated ${expression} ${ARGN})
+    if (NOT evaluated STREQUAL ${expected})
+        message(FATAL_ERROR "wrong math result: ${evaluated} != ${expected}")
+    endif ()
+endmacro()
+
+
+math_test("100 * 10" 1000)

Tests/RunCMake/math/RunCMakeTest.cmake

@@ -0,0 +1,3 @@
+include(RunCMake)
+
+run_cmake(MATH)