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: roundtrip.go
    path of file: ./repos/kubernetes/staging/src/k8s.io/component-base/config/testing
    
    the code of the file until where you have to start completion: /*
Copyright 2019 The Kubernetes Authors.

L
    
func roundTrip(t *testing.T, tc TestCase) {
	object := decodeYAML(t, tc.in, tc.codec)

	// original object of internal type
	original := object

	// encode (serialize) the object using the provided codec
	data, err := runtime.Encode(tc.codec, object)
	if err != nil {
		t.Fatalf("failed to encode object: %v", err)
	}

	// ensure that the encoding should not alter the object
	if !apiequality.Semantic.DeepEqual(original, object) {
		t.Fatalf("encode altered the object, diff (- want, + got): \n%v", cmp.Diff(original, object))
	}

	// decode (deserialize) the encoded data back into an object
	obj2, err := runtime.Decode(tc.codec, data)
	if err != nil {
		t.Fatalf("failed to decode: %v", err)
	}

	// ensure that the object produced from decoding the encoded data is equal
	// to the original object
	if !apiequality.Semantic.DeepEqual(original, obj2) {
		t.Fatalf("object was not the same after roundtrip, diff (- want, + got):\n%v", cmp.Diff(object, obj2))
	}

	// match with the input file, checks if they're the same after roundtrip
	matchOutputFile(t, data, tc.out)
}