fixed broken tests

Author: Andrei Neagu

services/director-v2/src/simcore_service_director_v2/modules/dynamic_sidecar/scheduler/_core/_events_utils.py

@@ -173,7 +173,7 @@ async def service_save_state(
         size = await sidecars_client.save_service_state(
             scheduler_data.endpoint, progress_callback=progress_callback
         )
-    if size > 0:
+    if size and size > 0:
         get_instrumentation(app).dynamic_sidecar_metrics.push_service_state_rate.labels(
             **get_metrics_labels(scheduler_data)
         ).observe(get_rate(size, duration.to_float()))
@@ -480,7 +480,7 @@ async def _pull_output_ports_with_metrics() -> None:
             size: int = await sidecars_client.pull_service_output_ports(
                 dynamic_sidecar_endpoint
             )
-        if size > 0:
+        if size and size > 0:
             get_instrumentation(
                 app
             ).dynamic_sidecar_metrics.output_ports_pull_rate.labels(
@@ -505,7 +505,7 @@ async def _restore_service_state_with_metrics() -> None:
         with track_duration() as duration:
             size = await sidecars_client.restore_service_state(dynamic_sidecar_endpoint)
 
-        if size > 0:
+        if size and size > 0:
             get_instrumentation(
                 app
             ).dynamic_sidecar_metrics.pull_service_state_rate.labels(

services/director-v2/src/simcore_service_director_v2/modules/dynamic_sidecar/scheduler/_core/_scheduler.py

@@ -464,7 +464,7 @@ async def retrieve_service_inputs(
         )
         duration = time.time() - started
 
-        if transferred_bytes > 0:
+        if transferred_bytes and transferred_bytes > 0:
             get_instrumentation(
                 self.app
             ).dynamic_sidecar_metrics.input_ports_pull_rate.labels(