mock-redfish-server/mockup/redfish/v1/Chassis/index.json

{
    "@odata.type": "#ChassisCollection.ChassisCollection",
    "Name": "Chassis Collection",
    "@odata.context": "/redfish/v1/$metadata#Chassis.Chassis",
    "Members": [
        {
            "@odata.id": "/redfish/v1/Chassis/1"
        }
    ],
    "Description": "Collection of Chassis",
    "@odata.id": "/redfish/v1/Chassis",
    "Members@odata.count": 1
}