Tests: Add tests for install(PACKAGE_INFO)

Add several test cases to verify that install(PACKAGE_INFO) is working
as expected. These cover validating the output for several scenarios,
improper use of the command, effects of command arguments, and a handful
of improper uses.

Tests that should still be added include one covering DESTINATION (both
the default and user-specified) and the CPS location and link_location
attributes. These have been skipped for now because the former requires
actually installing a test project, and the latter involves validating
attributes whose values are platform-dependent. (In particular, I don't
think link_location will appear on not-Windows.) Additionally, there is
no coverage of (other) common install-command arguments such as
PERMISSIONS, COMPONENT, etc.; however, because the logic implementing
these is shared, the tests covering them for other sub-commands is
probably sufficient.

Note that, because the files are generated in a location that includes a
hash of the install destination, and because the default destination is
platform dependent, the tests need to specify a fixed DESTINATION so
that the location of generated files (which we need to inspect and
validate) is predictable.

1 files changed, 4 insertions, 0 deletions

diff --git a/Tests/RunCMake/PackageInfo/ReferencesWronglyNamespacedTarget-stderr.txt b/Tests/RunCMake/PackageInfo/ReferencesWronglyNamespacedTarget-stderr.txt
new file mode 100644
index 0000000..0a6872e
--- /dev/null
+++ b/Tests/RunCMake/PackageInfo/ReferencesWronglyNamespacedTarget-stderr.txt
@@ -0,0 +1,4 @@
+CMake Error in CMakeLists.txt:
+  Target "foo" references target "wrong::lib", which comes from the "broken"
+  package, but does not belong to the package's canonical namespace.  This is
+  not allowed.