variable_watch: Add test for MODIFIED_ACCESS report

Add a RunCMake.variable_watch watch test to cover the basic use case.

Tests/RunCMake/CMakeLists.txt

@@ -77,6 +77,7 @@ add_RunCMake_test(include)
 add_RunCMake_test(include_directories)
 add_RunCMake_test(list)
 add_RunCMake_test(try_compile)
+add_RunCMake_test(variable_watch)
 add_RunCMake_test(CMP0004)
 
 find_package(Qt4 QUIET)

Tests/RunCMake/variable_watch/CMakeLists.txt

@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 2.8)
+project(${RunCMake_TEST} NONE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/variable_watch/ModifiedAccess-stderr.txt

@@ -0,0 +1,3 @@
+\* Variable "b" was accessed using MODIFIED_ACCESS in: .*/Tests/RunCMake/variable_watch/ModifiedAccess.cmake
+  The value of the variable: "b"
+  The list file stack: .*/Tests/RunCMake/variable_watch/CMakeLists.txt;.*/Tests/RunCMake/variable_watch/ModifiedAccess.cmake

Tests/RunCMake/variable_watch/ModifiedAccess.cmake

@@ -0,0 +1,3 @@
+set(b "a")
+variable_watch(b)
+set(b "b")

Tests/RunCMake/variable_watch/RunCMakeTest.cmake

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