add a span processor test

Author: sentrivana

tests/opentelemetry/test_span_processor.py

@@ -0,0 +1,19 @@
+import sentry_sdk
+
+
+def test_span_processor_omits_underscore_attributes(sentry_init, capture_events):
+    sentry_init(traces_sample_rate=1.0)
+
+    events = capture_events()
+
+    with sentry_sdk.start_span():
+        with sentry_sdk.start_span() as span:
+            span.set_attribute("_internal", 47)
+            span.set_attribute("noninternal", 23)
+
+    assert span._otel_span.attributes["_internal"] == 47
+    assert span._otel_span.attributes["noninternal"] == 23
+
+    outgoing_span = events[0]["spans"][0]
+    assert "_internal" not in outgoing_span["data"]
+    assert "noninternal" in outgoing_span["data"]