Add RPC_GRPC_STATUS_CODE assertions to client error tests

Verify that error spans include the correct gRPC status code attribute
(INVALID_ARGUMENT) in both sync and async client interceptor tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: juandelacruz-calvo

instrumentation/opentelemetry-instrumentation-grpc/tests/test_aio_client_interceptor.py

@@ -224,6 +224,10 @@ async def test_error_simple(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     async def test_error_unary_stream(self):
         with self.assertRaises(grpc.RpcError):
@@ -237,6 +241,10 @@ async def test_error_unary_stream(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     async def test_error_stream_unary(self):
         with self.assertRaises(grpc.RpcError):
@@ -249,6 +257,10 @@ async def test_error_stream_unary(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     async def test_error_stream_stream(self):
         with self.assertRaises(grpc.RpcError):
@@ -264,6 +276,10 @@ async def test_error_stream_stream(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     # pylint:disable=no-self-use
     async def test_client_interceptor_trace_context_propagation(self):

instrumentation/opentelemetry-instrumentation-grpc/tests/test_client_interceptor.py

@@ -277,6 +277,10 @@ def test_error_simple(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     def test_error_stream_unary(self):
         with self.assertRaises(grpc.RpcError):
@@ -289,6 +293,10 @@ def test_error_stream_unary(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     def test_error_unary_stream(self):
         with self.assertRaises(grpc.RpcError):
@@ -301,6 +309,10 @@ def test_error_unary_stream(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     def test_error_stream_stream(self):
         with self.assertRaises(grpc.RpcError):
@@ -313,6 +325,10 @@ def test_error_stream_stream(self):
             span.status.status_code,
             trace.StatusCode.ERROR,
         )
+        self.assertEqual(
+            span.attributes[RPC_GRPC_STATUS_CODE],
+            grpc.StatusCode.INVALID_ARGUMENT.value[0],
+        )
 
     def test_client_interceptor_falsy_response(
         self,