Rewrite and expand EUnit suite; run unit tests in CI from shared test image. Refs EventHub/EventHubBack#36 [skip ci]

test/unit/ws_handler_tests.erl

@@ -25,7 +25,12 @@ ws_handler_test_() ->
 
 test_websocket_info_booking() ->
   State = #state{user_id = <<"user123">>, subscriptions = []},
-  Data = #{booking_id => <<"book123">>, event_id => <<"ev123">>, status => confirmed},
+  Data = #{
+    user_id => <<"user123">>,
+    booking_id => <<"book123">>,
+    event_id => <<"ev123">>,
+    status => confirmed
+  },
   Msg = {notification, booking_update, Data},
 
   case ws_handler:websocket_info(Msg, State) of
@@ -58,4 +63,4 @@ test_websocket_info_event() ->
       Decoded = jsx:decode(Reply, [return_maps]),
       ?assertEqual(<<"event_update">>, maps:get(<<"type">>, Decoded));
     _ -> ?assert(false, "Expected reply")
-  end.
+  end.