repository: unify repository initialization in tests

Tests should use a helper from internal/repository/testing.go to
construct a Repository object.

internal/repository/lock_test.go

@@ -31,10 +31,7 @@ func openLockTestRepo(t *testing.T, wrapper backendWrapper) restic.Repository {
 		rtest.OK(t, err)
 	}
 
-	repo, err := New(be, Options{})
-	rtest.OK(t, err)
-	rtest.OK(t, repo.SearchKey(context.TODO(), test.TestPassword, 1, ""))
-	return repo
+	return TestOpenBackend(t, be)
 }
 
 func checkedLockRepo(ctx context.Context, t *testing.T, repo restic.Repository, lockerInst *locker, retryLock time.Duration) (*Unlocker, context.Context) {
@@ -77,9 +74,7 @@ func TestLockCancel(t *testing.T) {
 func TestLockConflict(t *testing.T) {
 	t.Parallel()
 	repo := openLockTestRepo(t, nil)
-	repo2, err := New(repo.Backend(), Options{})
-	test.OK(t, err)
-	test.OK(t, repo2.SearchKey(context.TODO(), test.TestPassword, 1, ""))
+	repo2 := TestOpenBackend(t, repo.Backend())
 
 	lock, _, err := Lock(context.Background(), repo, true, 0, func(msg string) {}, func(format string, args ...interface{}) {})
 	test.OK(t, err)

internal/repository/repository_test.go

@@ -221,10 +221,9 @@ func benchmarkLoadUnpacked(b *testing.B, version uint) {
 var repoFixture = filepath.Join("testdata", "test-repo.tar.gz")
 
 func TestRepositoryLoadIndex(t *testing.T) {
-	repodir, cleanup := rtest.Env(t, repoFixture)
+	repo, cleanup := repository.TestFromFixture(t, repoFixture)
 	defer cleanup()
 
-	repo := repository.TestOpenLocal(t, repodir)
 	rtest.OK(t, repo.LoadIndex(context.TODO(), nil))
 }
 
@@ -243,7 +242,7 @@ func loadIndex(ctx context.Context, repo restic.LoaderUnpacked, id restic.ID) (*
 }
 
 func TestRepositoryLoadUnpackedBroken(t *testing.T) {
-	repodir, cleanup := rtest.Env(t, repoFixture)
+	repo, cleanup := repository.TestFromFixture(t, repoFixture)
 	defer cleanup()
 
 	data := rtest.Random(23, 12345)
@@ -252,7 +251,6 @@ func TestRepositoryLoadUnpackedBroken(t *testing.T) {
 	// damage buffer
 	data[0] ^= 0xff
 
-	repo := repository.TestOpenLocal(t, repodir)
 	// store broken file
 	err := repo.Backend().Save(context.TODO(), h, backend.NewByteReader(data, nil))
 	rtest.OK(t, err)
@@ -289,10 +287,7 @@ func TestRepositoryLoadUnpackedRetryBroken(t *testing.T) {
 
 	be, err := local.Open(context.TODO(), local.Config{Path: repodir, Connections: 2})
 	rtest.OK(t, err)
-	repo, err := repository.New(&damageOnceBackend{Backend: be}, repository.Options{})
-	rtest.OK(t, err)
-	err = repo.SearchKey(context.TODO(), rtest.TestPassword, 10, "")
-	rtest.OK(t, err)
+	repo := repository.TestOpenBackend(t, &damageOnceBackend{Backend: be})
 
 	rtest.OK(t, repo.LoadIndex(context.TODO(), nil))
 }

internal/repository/testing.go

@@ -95,8 +95,15 @@ func TestRepositoryWithVersion(t testing.TB, version uint) restic.Repository {
 	return TestRepositoryWithBackend(t, nil, version, opts)
 }
 
+func TestFromFixture(t testing.TB, repoFixture string) (restic.Repository, func()) {
+	repodir, cleanup := test.Env(t, repoFixture)
+	repo := TestOpenLocal(t, repodir)
+
+	return repo, cleanup
+}
+
 // TestOpenLocal opens a local repository.
-func TestOpenLocal(t testing.TB, dir string) (r restic.Repository) {
+func TestOpenLocal(t testing.TB, dir string) restic.Repository {
 	var be backend.Backend
 	be, err := local.Open(context.TODO(), local.Config{Path: dir, Connections: 2})
 	if err != nil {
@@ -105,6 +112,10 @@ func TestOpenLocal(t testing.TB, dir string) (r restic.Repository) {
 
 	be = retry.New(be, 3, nil, nil)
 
+	return TestOpenBackend(t, be)
+}
+
+func TestOpenBackend(t testing.TB, be backend.Backend) restic.Repository {
 	repo, err := New(be, Options{})
 	if err != nil {
 		t.Fatal(err)