{
  "description": "Banner does not define width nor height in format array element nor comes with w and h field values",
  "mockBidRequest": {
    "id":"req-id",
    "imp": [
      {
        "id": "imp-id",
        "banner": {
          "format": [{}]
        }
      }
    ],
    "app": {
      "id": "app_001"
    }
  },
  "expectedReturnCode": 400,
  "expectedErrorMessage": "Invalid request: Request imp[0].banner.format[0] should define *either* {w, h} (for static size requirements) *or* {wmin, wratio, hratio} (for flexible sizes) to be non-zero.\n"
}