erp5_json_rpc_api: testfixup

master/bt5/erp5_json_rpc_api/TestTemplateItem/portal_components/test.erp5.testJsonRpcAPIService.py

@@ -472,12 +472,18 @@ class TestJsonRpcAPIJsonFormHandling(JsonRpcAPITestCase):
       'raise CustomError("custom error title")',
     )
     self.addJSONForm(
-      'JsonRpcService_testExample',
+      'JsonRpcService_callFromTest',
       '{}',
-      after_method_id='JsonRpcService_fail',
+      after_method_id='JsonRpcService_customError',
     )
     response = self.publish(
-      self.connector.getPath() + '/json.form.handling.callable')
+      self.connector.getPath() + '/json.form.handling.callable',
+      user='ERP5TypeTestCase',
+      request_method='POST',
+      stdin=io.BytesIO(
+        '{}'.encode()),
+      env={'CONTENT_TYPE': 'application/json'}
+    )
     self.assertEqual(
       response.getBody(),
       json.dumps(