Tests: Add case showing CMP0048 warning on injected project command

Issue: #18202

Tests/RunCMake/CMakeLists.txt

@@ -240,6 +240,7 @@ add_RunCMake_test(include_guard)
 add_RunCMake_test(list)
 add_RunCMake_test(message)
 add_RunCMake_test(project -DCMake_TEST_RESOURCES=${CMake_TEST_RESOURCES})
+add_RunCMake_test(project_injected)
 add_RunCMake_test(return)
 add_RunCMake_test(separate_arguments)
 add_RunCMake_test(set_property)

Tests/RunCMake/project_injected/CMP0048-WARN-stderr.txt

@@ -0,0 +1,12 @@
+^CMake Warning \(dev\) in CMakeLists.txt:
+  Policy CMP0048 is not set: project\(\) command manages VERSION variables.
+  Run "cmake --help-policy CMP0048" for policy details.  Use the cmake_policy
+  command to set the policy and suppress this warning.
+
+  The following variable\(s\) would be set to empty:
+
+    CMAKE_PROJECT_VERSION
+    CMAKE_PROJECT_VERSION_MAJOR
+    CMAKE_PROJECT_VERSION_MINOR
+    CMAKE_PROJECT_VERSION_PATCH
+This warning is for project developers.  Use -Wno-dev to suppress it.$

Tests/RunCMake/project_injected/CMakeLists.txt

@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 2.8.12.2) # old enough to not set CMP0048
+# no project(${RunCMake_TEST} NONE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/project_injected/RunCMakeTest.cmake

@@ -0,0 +1,12 @@
+include(RunCMake)
+
+set(RunCMake_TEST_OPTIONS
+  # Simulate a previous CMake run that used `project(... VERSION ...)`
+  # in a non-injected call site.
+  -DCMAKE_PROJECT_VERSION:STATIC=1.2.3
+  -DCMAKE_PROJECT_VERSION_MAJOR:STATIC=1
+  -DCMAKE_PROJECT_VERSION_MINOR:STATIC=2
+  -DCMAKE_PROJECT_VERSION_PATCH:STATIC=3
+  )
+run_cmake(CMP0048-WARN)
+unset(RunCMake_TEST_OPTIONS)