Feature/add scope to sampling context asgi integration

sentry_sdk/integrations/asgi.py

@@ -139,7 +139,9 @@ async def _run_app(self, scope, callback):
                 transaction.name = _DEFAULT_TRANSACTION_NAME
                 transaction.set_tag("asgi.type", ty)
 
-                with hub.start_transaction(transaction):
+                with hub.start_transaction(
+                    transaction, custom_sampling_context={"scope": scope}
+                ):
                     # XXX: Would be cool to have correct span status, but we
                     # would have to wrap send(). That is a bit hard to do with
                     # the current abstraction over ASGI 2/3.

tests/integrations/asgi/test_asgi.py

@@ -8,6 +8,11 @@
 from starlette.testclient import TestClient
 from starlette.websockets import WebSocket
 
+try:
+    from unittest import mock  # python 3.3 and above
+except ImportError:
+    import mock  # python < 3.3
+
 
 @pytest.fixture
 def app():
@@ -202,3 +207,41 @@ def handler(*args, **kwargs):
     (exception,) = event["exception"]["values"]
     assert exception["type"] == "ValueError"
     assert exception["value"] == "oh no"
+
+
+async def test_traces_sampler_gets_scope_object_in_sampling_context(
+    sentry_init,
+    app,
+    capture_events,
+    DictionaryContaining,  # noqa:N803
+    ObjectDescribedBy,  # noqa:N803
+):
+    test_url = "/sync-message"
+
+    traces_sampler = mock.Mock()
+    sentry_init(send_default_pii=True, traces_sampler=traces_sampler)
+
+    events = capture_events()
+
+    client = TestClient(app)
+    response = client.get(test_url)
+
+    assert response.status_code == 200
+
+    traces_sampler.assert_any_call(
+        DictionaryContaining(
+            {
+                "scope": ObjectDescribedBy(
+                    type=dict,
+                    attrs={
+                        "type": "http",
+                        "http_version": "1.1",
+                        "method": "GET",
+                        "path": test_url,
+                        "root_path": "",
+                        "scheme": "http",
+                    },
+                )
+            }
+        )
+    )