Tests: Test per-CC behavior of CMP0116

Tests/RunCMake/CMP0116/CMP0116-Mixed-stderr.txt

@@ -0,0 +1,17 @@
+^CMake Warning \(dev\) at CMP0116-Mixed\.cmake:1 \(add_custom_command\):
+  Policy CMP0116 is not set: Ninja generators transform DEPFILEs from
+  add_custom_command\(\)\.  Run "cmake --help-policy CMP0116" for policy
+  details\.  Use the cmake_policy command to set the policy and suppress this
+  warning\.
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:[0-9]+ \(include\)
+This warning is for project developers\.  Use -Wno-dev to suppress it\.(
+
+CMake Warning \(dev\) at CMP0116-Mixed\.cmake:1 \(add_custom_command\):
+  Policy CMP0116 is not set: Ninja generators transform DEPFILEs from
+  add_custom_command\(\)\.  Run "cmake --help-policy CMP0116" for policy
+  details\.  Use the cmake_policy command to set the policy and suppress this
+  warning\.
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:[0-9]+ \(include\)
+This warning is for project developers\.  Use -Wno-dev to suppress it\.)*$

Tests/RunCMake/CMP0116/CMP0116-Mixed.cmake

@@ -0,0 +1,18 @@
+add_custom_command(
+  OUTPUT warn.txt
+  COMMAND ${CMAKE_COMMAND} -E touch warn.txt
+  DEPFILE warn.d
+  )
+cmake_policy(SET CMP0116 OLD)
+add_custom_command(
+  OUTPUT old.txt
+  COMMAND ${CMAKE_COMMAND} -E touch old.txt
+  DEPFILE old.d
+  )
+cmake_policy(SET CMP0116 NEW)
+add_custom_command(
+  OUTPUT new.txt
+  COMMAND ${CMAKE_COMMAND} -E touch new.txt
+  DEPFILE new.d
+  )
+add_custom_target(cc ALL DEPENDS warn.txt old.txt new.txt)

Tests/RunCMake/CMP0116/RunCMakeTest.cmake

@@ -47,3 +47,6 @@ run_cmp0116(NEW OFF)
 run_cmp0116(WARN ON)
 run_cmp0116(OLD ON)
 run_cmp0116(NEW ON)
+
+set(RunCMake_TEST_OPTIONS -DCMAKE_POLICY_WARNING_CMP0116:BOOL=TRUE)
+run_cmake(CMP0116-Mixed)