third_party/protobuf/3.6.1/php/tests/proto/test_descriptors.proto

syntax = "proto3";

package descriptors;

message TestDescriptorsMessage {
  int32 optional_int32 = 1;
  TestDescriptorsEnum optional_enum = 16;
  Sub optional_message = 17;

  // Repeated
  repeated int32 repeated_int32 = 31;
  repeated Sub repeated_message = 47;

  oneof my_oneof {
    int32 oneof_int32    = 51;
  }

  map<int32, EnumSub> map_int32_enum = 71;

  message Sub {
    int32 a = 1;
    repeated int32 b = 2;
  }

  enum EnumSub {
    ZERO = 0;
    ONE = 1;
  }
}

enum TestDescriptorsEnum {
  ZERO = 0;
  ONE  = 1;
}