EventPayloadIs expects peer.ChaincodeEvent payload can be marshaled to target interface{} and returns converted value.

PayloadBytes expects response is ok and compares response.Payload with expected value.

PayloadIs expects peer.Response payload can be marshalled to target interface{} and returns converted value.

PayloadString expects payload content is string.

ResponseError expects peer.Response has shim.ERROR status and message has errorSubstr prefix.

ResponseOk expects peer.Response has shim.OK status and message has okSubstr prefix.