add test for enum support in operation param for python codegen

src/lib/test/op-params-only-from-open-api-open-api.yml

@@ -0,0 +1,17 @@
+paths:
+  /op0/path:
+    get:
+      parameters:
+        - in: query
+          name: optQueryParamEnumWithDefault
+          schema:
+            $ref: '#/components/schemas/SomeEnum'
+            default: second-val
+      operationId: op0Gett
+components:
+  schemas:
+    SomeEnum:
+      type: string
+      enum:
+        - first-val
+        - second-val

src/lib/test/op-params-only-from-open-api-trust.yml

@@ -0,0 +1,15 @@
+ops:
+  /op0/path:
+    - name: op0Gett
+      params:
+        - loc: query
+          name: optQueryParamEnumWithDefault
+          path: defs.SomeEnum
+          default: second-val
+      type: GET
+defs:
+  SomeEnum:
+    type: enum
+    vals:
+      - first-val
+      - second-val

src/lib/test/op-params-open-api.yml

@@ -28,6 +28,11 @@ paths:
           schema:
             type: boolean
             default: true
+        - in: query
+          name: optQueryParamEnum
+          schema:
+            $ref: '#/components/schemas/SomeEnum'
+          required: true
       operationId: op0Gett
     post:
       parameters:
@@ -74,3 +79,10 @@ paths:
         schema:
           type: string
         required: true
+components:
+  schemas:
+    SomeEnum:
+      type: string
+      enum:
+        - first-val
+        - second-val

src/lib/test/op-params-trust.yml

@@ -34,6 +34,9 @@ ops:
           loc: query
           type: bool
           default: true
+        - name: optQueryParamEnum
+          loc: query
+          path: defs.SomeEnum
       type: GET
     - name: op1Postt
       params:
@@ -62,3 +65,9 @@ ops:
           loc: query
           type: str
       type: POST
+defs:
+  SomeEnum:
+    type: enum
+    vals:
+      - first-val
+      - second-val

src/lib/test/op_params.rs

@@ -15,11 +15,21 @@ mod op_params {
         from_open_api_test_fn("op-params");
     }
 
+    #[test]
+    fn only_from_open_api_test() {
+        from_open_api_test_fn("op-params-only-from-open-api");
+    }
+
     #[test]
     fn gen_python_client_test() {
         gen_test(Lang::Python, Role::Client, "op-params-trust.yml");
     }
 
+    #[test]
+    fn gen_python_extended_client_test() {
+        gen_test(Lang::Python, Role::Client, "op-params-only-from-open-api-trust.yml");
+    }
+
     #[test]
     fn gen_python_server_test() {
         gen_test(Lang::Python, Role::Server, "op-params-trust.yml");