github.com/prebid/prebid-server@v0.275.0/endpoints/openrtb2/sample-requests/invalid-whole/imp-empty-array.json (about)

     1  {
     2    "description": "Bid request comes with an empty Imp array",
     3    "mockBidRequest": {
     4      "id": "req-id",
     5      "imp": []
     6    },
     7    "expectedReturnCode": 400,
     8    "expectedErrorMessage": "Invalid request: request.imp must contain at least one element.\n"
     9  }