Add event serialization testing

tests/everest/test_everserver.py

@@ -8,6 +8,8 @@
 from ropt.enums import OptimizerExitCode
 from seba_sqlite.snapshot import SebaSnapshot
 
+from _ert.events import event_from_json, event_to_json
+from ert.run_models.everest_run_model import EverestRunModel
 from everest.config import EverestConfig, ServerConfig
 from everest.detached import ServerStatus, everserver_status
 from everest.detached.jobs import everserver
@@ -271,3 +273,34 @@ def test_everserver_status_max_batch_num(
         filter_out_gradient=False, batches=None
     )
     assert {data.batch for data in snapshot.simulation_data} == {0}
+
+
+def test_event_serialization(
+    copy_math_func_test_data_to_tmp,
+    evaluator_server_config_generator,
+):
+    config = EverestConfig.load_file("config_minimal.yml")
+
+    def check_status_round_tripping(status):
+        round_trip_status = json.loads(json.dumps(status))
+        assert round_trip_status == status
+
+    run_model = EverestRunModel.create(
+        config,
+        simulation_callback=check_status_round_tripping,
+    )
+
+    send_snapshot_event = run_model.send_snapshot_event
+
+    def check_event_serialization_round_trip(*args, **_):
+        event, iteration = args
+        event_json = event_to_json(event)
+        round_trip_event = event_from_json(str(event_json))
+        assert event == round_trip_event
+        send_snapshot_event(*args)
+
+    run_model.send_snapshot_event = check_event_serialization_round_trip
+
+    evaluator_server_config = evaluator_server_config_generator(run_model)
+
+    run_model.run_experiment(evaluator_server_config)