Merge branch 'add_nest_test' into 'master'

Add `install_test` for `nest` package

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!177

packages/nest/package.py

@@ -185,3 +185,8 @@ class Nest(CMakePackage):
     # this should happen automatically for packages extending Python...
     def setup_run_environment(self, env):
         env.prepend_path('PYTHONPATH', self.prefix.lib64.join('python3.8/site-packages'))
+
+    def install_test(self):
+        # test inspired by py-numpy spack package
+        with working_dir('spack-test', create=True):
+            python('-c', 'from pprint import pprint; import nest; pprint(nest.get())')