You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: shortrfc3339_test.go
    path of file: ./repos/evcc/util/shortrfc3339
    
    the code of the file until where you have to start completion: package shortrfc3339

import (
	"testing"
)

var (
	tTsBytes      = []byte("2023-04-20T14:30Z")
	tTsStringRepr = "2023-04-20 14:30:00 +0000 UTC"
)

func TestMarshalling(t *testing.T) {
	// Firstly, test that we can unmarshal into a struct.
	ct := Timestamp{}
	if err := ct.UnmarshalJSON(tTsBytes); err != nil {
		t.Fatal(err)
	}
	if ct.Time.String() != tTsStringRepr {
		t.Errorf("time did not unmarshal successfully: got 
    
func TestMarshalling(t *testing.T) {
	// Firstly, test that we can unmarshal into a struct.
	ct := Timestamp{}
	if err := ct.UnmarshalJSON(tTsBytes); err != nil {
		t.Fatal(err)
	}
	if ct.Time.String() != tTsStringRepr {
		t.Errorf("time did not unmarshal successfully: got %s, expected %s", ct.Time.String(), tTsStringRepr)
	}

	// Now test remarshalling.
	res, err := ct.MarshalJSON()
	if err != nil {
		t.Fatal(err)
	}
	if string(res) != string(tTsBytes) {
		t.Errorf("time did not marshal successfully: got %s, expected %s", res, tTsBytes)
	}
}