Implement augmenting the CEL environment with attributes from config.yaml.

PiperOrigin-RevId: 731756785

Author: CEL Dev Team

testing/src/test/resources/policy/nested_rule/eval_error_config.yaml

@@ -0,0 +1,30 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: "nested_rule"
+functions:
+  - name: "foo"
+    overloads:
+      - id: 'foo_id'
+        args:
+          - type_name: 'string'
+        return:
+          type_name: 'bool'
+variables:
+  - name: "resource"
+    type:
+      type_name: "map"
+      params:
+        - type_name: "string"
+        - type_name: "dyn"

testing/src/test/resources/policy/nested_rule/eval_error_tests.textproto

@@ -27,7 +27,7 @@ sections {
     }
     eval_error {
       errors {
-        message: "evaluation error: No matching overload for function 'foo'. Overload candidates: foo"
+        message: "evaluation error: No matching overload for function 'foo'. Overload candidates: foo_id"
       }
     }
   }