tests: add tests for User + cache interactions

test/user_test.exs

@@ -551,4 +551,31 @@ test "html_filter_policy returns TwitterText scrubber when rich-text is disabled
       assert Pleroma.HTML.Scrubber.TwitterText == User.html_filter_policy(user)
     end
   end
+
+  describe "caching" do
+    test "invalidate_cache works" do
+      user = insert(:user)
+      user_info = User.get_cached_user_info(user)
+
+      User.invalidate_cache(user)
+
+      {:ok, nil} = Cachex.get(:user_cache, "ap_id:#{user.ap_id}")
+      {:ok, nil} = Cachex.get(:user_cache, "nickname:#{user.nickname}")
+      {:ok, nil} = Cachex.get(:user_cache, "user_info:#{user.id}")
+    end
+
+    test "User.delete() plugs any possible zombie objects" do
+      user = insert(:user)
+
+      {:ok, _} = User.delete(user)
+
+      {:ok, cached_user} = Cachex.get(:user_cache, "ap_id:#{user.ap_id}")
+
+      assert cached_user != user
+
+      {:ok, cached_user} = Cachex.get(:user_cache, "nickname:#{user.ap_id}")
+
+      assert cached_user != user
+    end
+  end
 end