package bolt import ( "github.com/stretchr/testify/mock" ) type mocksyscall struct { mock.Mock } func (m *mocksyscall) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { args := m.Called(fd, offset, length, prot, flags) return args.Get(0).([]byte), args.Error(1) }