152 lines
3.5 KiB
Go
152 lines
3.5 KiB
Go
/*
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Copyright The Velero Contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package archive
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import (
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"archive/tar"
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"compress/gzip"
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"io"
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"os"
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/vmware-tanzu/velero/pkg/test"
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"github.com/vmware-tanzu/velero/pkg/util/filesystem"
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)
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func TestUnzipAndExtractBackup(t *testing.T) {
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tests := []struct {
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name string
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files []string
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IsTarball bool
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wantErr bool
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}{
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{
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name: "when the format of backup file is invalid, an error is returned",
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files: []string{},
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IsTarball: false,
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wantErr: true,
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},
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{
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name: "when the backup tarball is empty, the function should work correctly and returns no error",
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files: []string{},
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IsTarball: true,
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wantErr: false,
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},
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{
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name: "when the backup tarball includes a mix of items, the function should work correctly and returns no error",
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files: []string{
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"root-dir/resources/namespace/cluster/example.json",
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"root-dir/resources/pods/namespaces/example.json",
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"root-dir/metadata/version",
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},
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IsTarball: true,
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wantErr: false,
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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ext := NewExtractor(test.NewLogger(), test.NewFakeFileSystem())
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var fileName string
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var err error
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if tc.IsTarball {
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fileName, err = createArchive(tc.files, ext.fs)
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} else {
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fileName, err = createRegular(ext.fs)
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}
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require.NoError(t, err)
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file, err := ext.fs.OpenFile(fileName, os.O_RDWR|os.O_CREATE, 0644)
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require.NoError(t, err)
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_, err = ext.UnzipAndExtractBackup(file.(io.Reader))
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if tc.wantErr && (err == nil) {
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t.Errorf("%s: wanted error but got nil", tc.name)
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}
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if !tc.wantErr && (err != nil) {
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t.Errorf("%s: wanted no error but got err: %v", tc.name, err)
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}
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})
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}
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}
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func createArchive(files []string, fs filesystem.Interface) (string, error) {
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outName := "output.tar.gz"
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out, err := fs.Create(outName)
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if err != nil {
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return outName, err
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}
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defer out.Close()
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gw := gzip.NewWriter(out)
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defer gw.Close()
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tw := tar.NewWriter(gw)
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defer tw.Close()
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// Iterate over files and add them to the tar archive
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for _, file := range files {
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err := addToArchive(tw, file, fs)
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if err != nil {
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return outName, err
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}
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}
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return outName, nil
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}
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func addToArchive(tw *tar.Writer, filename string, fs filesystem.Interface) error {
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// Create the file
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file, err := fs.Create(filename)
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if err != nil {
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return err
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}
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defer file.Close()
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// Get FileInfo about size, mode, etc.
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info, err := fs.Stat(filename)
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if err != nil {
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return err
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}
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// Create a tar Header from the FileInfo data
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header, err := tar.FileInfoHeader(info, info.Name())
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if err != nil {
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return err
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}
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header.Name = filename
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err = tw.WriteHeader(header)
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if err != nil {
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return err
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}
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return nil
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}
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func createRegular(fs filesystem.Interface) (string, error) {
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outName := "output"
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out, err := fs.Create(outName)
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if err != nil {
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return outName, err
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}
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defer out.Close()
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return outName, nil
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}
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