test: remove troublesome test

That test was mocking some ERTS internals and was causing Mix panic on
exit. We need to find a better way to test this functionality rather
than mocking so low level stuff in the VM, as it could break anytime.

test/integration/proxy_test.exs

@@ -72,6 +72,7 @@ defmodule Supavisor.Integration.ProxyTest do
              P.query!(origin, "select * from public.test where details = 'test_insert'", [])
   end
 
+  @tag cluster: true
   test "query via another node", %{proxy: proxy, user: user} do
     assert {:ok, _pid, node2} = Cluster.start_node()
 

test/supavisor/db_handler_test.exs

@@ -1,7 +1,8 @@
 defmodule Supavisor.DbHandlerTest do
   use ExUnit.Case, async: false
+
   alias Supavisor.DbHandler, as: Db
-  alias Supavisor.Protocol.Server
+
   # import Mock
   @id {{:single, "tenant"}, "user", :transaction, "postgres", nil}
 
@@ -152,40 +153,6 @@ defmodule Supavisor.DbHandlerTest do
     end
   end
 
-  describe "handle_event/4 with write replica message" do
-    test "updates caller in data for session mode" do
-      proto = :tcp
-      bin = "response_data" <> Server.ready_for_query()
-      caller_pid = self()
-
-      data = %{
-        id: @id,
-        caller: caller_pid,
-        sock: {:gen_tcp, nil},
-        stats: %{},
-        mode: :session,
-        sent: false
-      }
-
-      state = :some_state
-      event = {proto, :dummy_value, bin}
-
-      :meck.new(:prim_inet, [:unstick, :passthrough])
-      :meck.new(:inet, [:unstick, :passthrough])
-
-      :meck.expect(:prim_inet, :getstat, fn _, _ ->
-        {:ok, [{:recv_oct, 21}, {:send_oct, 37}]}
-      end)
-
-      :meck.expect(:inet, :setopts, fn _, _ -> :ok end)
-
-      :keep_state_and_data = Db.handle_event(:info, event, state, data)
-
-      :meck.unload(:prim_inet)
-      :meck.unload(:inet)
-    end
-  end
-
   describe "check_ready/1" do
     test "ready_for_query valid" do
       assert {:ready_for_query, :transaction_block} == Db.check_ready(<<90, 0, 0, 0, 5, ?T>>)

test/supavisor/syn_handler_test.exs

@@ -7,6 +7,7 @@ defmodule Supavisor.SynHandlerTest do
 
   @id {{:single, "syn_tenant"}, "postgres", :session, "postgres", nil}
 
+  @tag cluster: true
   test "resolving conflict" do
     {:ok, _pid, node2} = Cluster.start_node()
 

test/supavisor_web/controllers/metrics_controller_test.exs

@@ -13,6 +13,7 @@ defmodule SupavisorWeb.MetricsControllerTest do
     {:ok, conn: new_conn}
   end
 
+  @tag cluster: true
   test "exporting metrics", %{conn: conn} do
     {:ok, _pid, node2} = Cluster.start_node()