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: lock_test.go
    path of file: ./repos/dep
    
    the code of the file until where you have to start completion: // Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package dep

import (
	"reflect"
	"strings"
	"testing"

	"github.com/golang/dep/gps"
	"github.com/golang/dep/gps/verify"
	"github.com/golang/dep/internal/test"
)

func TestReadLock(t *testing.T) {
	h := test.NewHelper(t)
	defer h.Cleanup()

	golden := "lock/golden0.toml"
	g0f := h.GetTestFile(golden)
	defer g0f.Close()
	got, err := readLock(g0f)
	if err != nil {
		t.Fatalf("Should have read Lock correctly, but got err %q", err)
	}

	want := &Lock{
		SolveMeta: SolveMeta{InputImports: []string{}},
		P: []gps.LockedProject{
			verify.VerifiableProject{
				LockedProject: gps.NewLockedProject(
					gps.ProjectIdentifier{ProjectRoot: gps.ProjectRoot("github.com/golang/dep")},
					gps.NewBranch("master").Pair(gps.Revision("d05d5aca9f895d19e9265839bffeadd74a2d2ecb")),
					[]string{"."},
				),
				PruneOpts: gps.PruneOptions(1),
				Digest: verify.VersionedDigest{
					HashVersion: verify.HashVersion,
					Digest:      []byte("foo"),
				},
			},
		},
	}

	if !reflect.DeepEqual(got, want) {
		t.Error("Valid lock did not parse as expected")
	}

	golden = "lock/golden1.toml"
	g1f := h.GetTestFile(golden)
	defer g1f.Close()
	got, err = readLock(g1f)
	if err != nil {
		t.Fatalf("Should have read Lock correctly, but got err %q", err)
	}

	want = &Lock{
		SolveMeta: SolveMeta{InputImports: []string{}},
		P: []gps.LockedProject{
			verify.VerifiableProject{
				LockedProject: gps.NewLockedProject(
					gps.ProjectIdentifier{ProjectRoot: gps.ProjectRoot("github.com/golang/dep")},
					gps.NewVersion("0.12.2").Pair(gps.Revision("d05d5aca9f8
    
func TestWriteLock(t *testing.T) {
	h := test.NewHelper(t)
	defer h.Cleanup()

	golden := "lock/golden0.toml"
	want := h.GetTestFileString(golden)
	l := &Lock{
		P: []gps.LockedProject{
			verify.VerifiableProject{
				LockedProject: gps.NewLockedProject(
					gps.ProjectIdentifier{ProjectRoot: gps.ProjectRoot("github.com/golang/dep")},
					gps.NewBranch("master").Pair(gps.Revision("d05d5aca9f895d19e9265839bffeadd74a2d2ecb")),
					[]string{"."},
				),
				PruneOpts: gps.PruneOptions(1),
				Digest: verify.VersionedDigest{
					HashVersion: verify.HashVersion,
					Digest:      []byte("foo"),
				},
			},
		},
	}

	got, err := l.MarshalTOML()
	if err != nil {
		t.Fatalf("Error while marshaling valid lock to TOML: %q", err)
	}

	if string(got) != want {
		if *test.UpdateGolden {
			if err = h.WriteTestFile(golden, string(got)); err != nil {
				t.Fatal(err)
			}
		} else {
			t.Errorf("Valid lock did not marshal to TOML as expected:\n\t(GOT): %s\n\t(WNT): %s", string(got), want)
		}
	}

	golden = "lock/golden1.toml"
	want = h.GetTestFileString(golden)
	l = &Lock{
		P: []gps.LockedProject{
			verify.VerifiableProject{
				LockedProject: gps.NewLockedProject(
					gps.ProjectIdentifier{ProjectRoot: gps.ProjectRoot("github.com/golang/dep")},
					gps.NewVersion("0.12.2").Pair(gps.Revision("d05d5aca9f895d19e9265839bffeadd74a2d2ecb")),
					[]string{"."},
				),
				PruneOpts: gps.PruneOptions(15),
				Digest: verify.VersionedDigest{
					HashVersion: verify.HashVersion,
					Digest:      []byte("foo"),
				},
			},
		},
	}

	got, err = l.MarshalTOML()
	if err != nil {
		t.Fatalf("Error while marshaling valid lock to TOML: %q", err)
	}

	if string(got) != want {
		if *test.UpdateGolden {
			if err = h.WriteTestFile(golden, string(got)); err != nil {
				t.Fatal(err)
			}
		} else {
			t.Errorf("Valid lock did not marshal to TOML as expected:\n\t(GOT): %s\n\t(WNT): %s", string(got), want)
		}
	}
}