test(tracing): Update streaming tests for skipped orphan span creation

Align the rust_tracing and grpc aio streaming tests with the new
behavior where no root segment is created when there is no active
span in the streaming path.

Author: ericapisani

tests/integrations/grpc/test_grpc_aio.py

@@ -100,7 +100,7 @@ async def test_noop_for_unimplemented_method(
 
         sentry_sdk.flush()
         spans = [item.payload for item in items]
-        assert len(spans) == 1  # Only client span present.
+        assert len(spans) == 0  # No client span created without an active span.
     else:
         events = capture_events()
 

tests/integrations/rust_tracing/test_rust_tracing.py

@@ -309,10 +309,10 @@ def test_on_new_span_without_transaction(sentry_init, span_streaming):
     if span_streaming:
         assert sentry_sdk.traces.get_current_span() is None
 
+        # In streaming mode we do not create an orphan root segment when there
+        # is no active span
         rust_tracing.new_span(RustTracingLevel.Info, 3)
-        current_span = sentry_sdk.traces.get_current_span()
-        assert current_span is not None
-        assert current_span._segment is current_span
+        assert sentry_sdk.traces.get_current_span() is None
     else:
         assert sentry_sdk.get_current_span() is None