Add resouce_attr test.

Author: jimf5

tests/test_otel.py

@@ -34,6 +34,7 @@
     }
 
     otel_service_name {{ name }};
+    otel_resource_attr my.name "my {{ name }}";
     otel_trace on;
 
     add_header "X-Otel-Trace-Id" $otel_trace_id;
@@ -286,6 +287,13 @@ def test_service_name(self, http_ver, batches, idx, otel_mode):
             == f"test_http{http_ver}"
         )
 
+    @pytest.mark.parametrize("idx", [0, 1, 2], ids=["batch"] * 3)
+    def test_resouce_attr(self, http_ver, batches, idx, otel_mode):
+        assert (
+            span_attr(batches[idx][0].resource, "my.name", "string_value")
+            == f"my test_http{http_ver}"
+        )
+
     @pytest.mark.parametrize(
         ("idx", "value"),
         enumerate(