Add ArborX smoke tests (#22356)

var/spack/repos/builtin/packages/arborx/package.py

@@ -69,3 +69,42 @@ def cmake_args(self):
                 '-DCMAKE_CXX_COMPILER=%s' % spec["kokkos"].kokkos_cxx)
 
         return options
+
+    examples_src_dir = "examples"
+
+    @run_after('install')
+    def setup_build_tests(self):
+        """Copy the example source files after the package is installed to an
+        install test subdirectory for use during `spack test run`."""
+        self.cache_extra_test_sources([self.examples_src_dir])
+
+    def build_tests(self):
+        """Build test."""
+        cmake_build_path = join_path(self.install_test_root,
+                                     self.examples_src_dir, "build")
+        mkdirp(cmake_build_path)
+        cmake_prefix_path = "-DCMAKE_PREFIX_PATH={0}".format(self.spec['arborx'].prefix)
+
+        # We don't need to append the path to Kokkos to CMAKE_PREFIX_PATH
+        # since a hint is already hardcoded inside the CMake ArborX configuration.
+        # Omitting it here allows us to avoid to distinguish between Kokkos
+        # being installed as a standalone or as part of Trilinos.
+        if '+mpi' in self.spec:
+            cmake_prefix_path += ";{0}".format(self.spec['mpi'].prefix)
+        with working_dir(cmake_build_path):
+            cmake_args = ["..",
+                          cmake_prefix_path,
+                          "-DCMAKE_CXX_COMPILER={0}".format(self.compiler.cxx)]
+            cmake(*cmake_args)
+            make()
+
+    def run_tests(self):
+        """Run test."""
+        reason = 'Checking ability to execute.'
+        run_path = join_path(self.install_test_root, self.examples_src_dir, 'build')
+        with working_dir(run_path):
+            self.run_test('ctest', ['-V'], [], installed=False, purpose=reason)
+
+    def test(self):
+        self.build_tests()
+        self.run_tests()