FPHSA: add (failing) unit test for found version being equal to 0.

Tests/RunCMake/FPHSA/RunCMakeTest.cmake

@@ -4,6 +4,12 @@ run_cmake(BadFoundVar)
 
 # The pseudo module will "find" a package with the given version. Check if the
 # version selection code in FPHSA works correctly.
+
+# Find a package with version 0.
+set(RunCMake_TEST_OPTIONS "-DCMAKE_MODULE_PATH=${CMAKE_CURRENT_LIST_DIR}" "-DPseudo_VERSION=0")
+run_cmake(any_version_find_0)
+
+# Find a package with a more customary version number.
 set(RunCMake_TEST_OPTIONS "-DCMAKE_MODULE_PATH=${CMAKE_CURRENT_LIST_DIR}" "-DPseudo_VERSION=1.2.3.4.5")
 run_cmake(any_version)
 

Tests/RunCMake/FPHSA/any_version_find_0-stdout.txt

@@ -0,0 +1,2 @@
+Found Pseudo: [^
+]*\(found version "0\"\)

Tests/RunCMake/FPHSA/any_version_find_0.cmake

@@ -0,0 +1 @@
+find_package(Pseudo REQUIRED)