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// Copyright © 2021 Vasily Ovchinnikov <vasily@remerge.io>.
//
// Most of the tests are "derived" from the Afero's own tarfs implementation.
// Write-oriented tests and/or checks have been added on top of that
package gcsfs
import (
"context"
"errors"
"fmt"
"io"
"os"
"path/filepath"
"reflect"
"strings"
"syscall"
"testing"
"golang.org/x/oauth2/google"
"cloud.google.com/go/storage"
"github.com/googleapis/google-cloud-go-testing/storage/stiface"
"github.com/spf13/afero"
)
const (
testBytes = 8
dirSize = 42
)
var bucketName = "a-test-bucket"
var files = []struct {
name string
exists bool
isdir bool
size int64
content string
offset int64
contentAtOffset string
}{
{"sub", true, true, dirSize, "", 0, ""},
{"sub/testDir2", true, true, dirSize, "", 0, ""},
{"sub/testDir2/testFile", true, false, 8 * 1024, "c", 4 * 1024, "d"},
{"testFile", true, false, 12 * 1024, "a", 7 * 1024, "b"},
{"testDir1/testFile", true, false, 3 * 512, "b", 512, "c"},
{"", false, true, dirSize, "", 0, ""}, // special case
{"nonExisting", false, false, dirSize, "", 0, ""},
}
var dirs = []struct {
name string
children []string
}{
{"", []string{"sub", "testDir1", "testFile"}}, // in this case it will be prepended with bucket name
{"sub", []string{"testDir2"}},
{"sub/testDir2", []string{"testFile"}},
{"testDir1", []string{"testFile"}},
}
var gcsAfs *afero.Afero
func TestMain(m *testing.M) {
ctx := context.Background()
var err error
// in order to respect deferring
var exitCode int
defer os.Exit(exitCode)
defer func() {
err := recover()
if err != nil {
fmt.Print(err)
exitCode = 2
}
}()
// Check if any credentials are present. If not, a fake service account, taken from the link
// would be used: https://github.com/google/oauth2l/blob/master/integration/fixtures/fake-service-account.json
cred, err := google.FindDefaultCredentials(ctx)
if err != nil && !strings.HasPrefix(err.Error(), "google: could not find default credentials") {
panic(err)
}
if cred == nil {
var fakeCredentialsAbsPath string
fakeCredentialsAbsPath, err = filepath.Abs("gcs-fake-service-account.json")
if err != nil {
panic(err)
}
err = os.Setenv("GOOGLE_APPLICATION_CREDENTIALS", fakeCredentialsAbsPath)
if err != nil {
panic(err)
}
// reset it after the run
defer func() {
err = os.Remove("GOOGLE_APPLICATION_CREDENTIALS")
if err != nil {
// it's worth printing it out explicitly, since it might have implications further down the road
fmt.Print("failed to clear fake GOOGLE_APPLICATION_CREDENTIALS", err)
}
}()
}
var c *storage.Client
c, err = storage.NewClient(ctx)
if err != nil {
panic(err)
}
client := stiface.AdaptClient(c)
// This block is mocking the client for the sake of isolated testing
mockClient := newClientMock()
mockClient.Client = client
gcsAfs = &afero.Afero{Fs: &GcsFs{NewGcsFs(ctx, mockClient)}}
// Uncomment to use the real, not mocked, client
// gcsAfs = &Afero{Fs: &GcsFs{gcsfs.NewGcsFs(ctx, client)}}
exitCode = m.Run()
}
func createFiles(t *testing.T) {
t.Helper()
var err error
// the files have to be created first
for _, f := range files {
if !f.isdir && f.exists {
name := filepath.Join(bucketName, f.name)
var freshFile afero.File
freshFile, err = gcsAfs.Create(name)
if err != nil {
t.Fatalf("failed to create a file \"%s\": %s", f.name, err)
}
var written int
var totalWritten int64
for totalWritten < f.size {
if totalWritten < f.offset {
writeBuf := []byte(strings.Repeat(f.content, int(f.offset)))
written, err = freshFile.WriteAt(writeBuf, totalWritten)
} else {
writeBuf := []byte(strings.Repeat(f.contentAtOffset, int(f.size-f.offset)))
written, err = freshFile.WriteAt(writeBuf, totalWritten)
}
if err != nil {
t.Fatalf("failed to write a file \"%s\": %s", f.name, err)
}
totalWritten += int64(written)
}
err = freshFile.Close()
if err != nil {
t.Fatalf("failed to close a file \"%s\": %s", f.name, err)
}
}
}
}
func removeFiles(t *testing.T) {
t.Helper()
var err error
// the files have to be created first
for _, f := range files {
if !f.isdir && f.exists {
name := filepath.Join(bucketName, f.name)
err = gcsAfs.Remove(name)
if err != nil && err == syscall.ENOENT {
t.Errorf("failed to remove file \"%s\": %s", f.name, err)
}
}
}
}
func TestGcsFsOpen(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
file, err := gcsAfs.Open(name)
if (err == nil) != f.exists {
t.Errorf("%v exists = %v, but got err = %v", name, f.exists, err)
}
if !f.exists {
continue
}
if err != nil {
t.Fatalf("%v: %v", name, err)
}
if file.Name() != filepath.FromSlash(nameBase) {
t.Errorf("Name(), got %v, expected %v", file.Name(), filepath.FromSlash(nameBase))
}
s, err := file.Stat()
if err != nil {
t.Fatalf("stat %v: got error '%v'", file.Name(), err)
}
if isdir := s.IsDir(); isdir != f.isdir {
t.Errorf("%v directory, got: %v, expected: %v", file.Name(), isdir, f.isdir)
}
if size := s.Size(); size != f.size {
t.Errorf("%v size, got: %v, expected: %v", file.Name(), size, f.size)
}
}
}
}
func TestGcsRead(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
if !f.exists {
continue
}
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
file, err := gcsAfs.Open(name)
if err != nil {
t.Fatalf("opening %v: %v", name, err)
}
buf := make([]byte, 8)
n, err := file.Read(buf)
if err != nil {
if f.isdir && (err != syscall.EISDIR) {
t.Errorf("%v got error %v, expected EISDIR", name, err)
} else if !f.isdir {
t.Errorf("%v: %v", name, err)
}
} else if n != 8 {
t.Errorf("%v: got %d read bytes, expected 8", name, n)
} else if string(buf) != strings.Repeat(f.content, testBytes) {
t.Errorf("%v: got <%s>, expected <%s>", f.name, f.content, string(buf))
}
}
}
}
func TestGcsReadAt(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
if !f.exists {
continue
}
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
file, err := gcsAfs.Open(name)
if err != nil {
t.Fatalf("opening %v: %v", name, err)
}
buf := make([]byte, testBytes)
n, err := file.ReadAt(buf, f.offset-testBytes/2)
if err != nil {
if f.isdir && (err != syscall.EISDIR) {
t.Errorf("%v got error %v, expected EISDIR", name, err)
} else if !f.isdir {
t.Errorf("%v: %v", name, err)
}
} else if n != 8 {
t.Errorf("%v: got %d read bytes, expected 8", f.name, n)
} else if string(buf) != strings.Repeat(f.content, testBytes/2)+strings.Repeat(f.contentAtOffset, testBytes/2) {
t.Errorf("%v: got <%s>, expected <%s>", f.name, f.contentAtOffset, string(buf))
}
}
}
}
func TestGcsSeek(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
if !f.exists {
continue
}
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
file, err := gcsAfs.Open(name)
if err != nil {
t.Fatalf("opening %v: %v", name, err)
}
tests := []struct {
offIn int64
whence int
offOut int64
}{
{0, io.SeekStart, 0},
{10, io.SeekStart, 10},
{1, io.SeekCurrent, 11},
{10, io.SeekCurrent, 21},
{0, io.SeekEnd, f.size},
{-1, io.SeekEnd, f.size - 1},
}
for _, s := range tests {
n, err := file.Seek(s.offIn, s.whence)
if err != nil {
if f.isdir && err == syscall.EISDIR {
continue
}
t.Errorf("%v: %v", name, err)
}
if n != s.offOut {
t.Errorf("%v: (off: %v, whence: %v): got %v, expected %v", f.name, s.offIn, s.whence, n, s.offOut)
}
}
}
}
}
func TestGcsName(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
if !f.exists {
continue
}
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
file, err := gcsAfs.Open(name)
if err != nil {
t.Fatalf("opening %v: %v", name, err)
}
n := file.Name()
if n != filepath.FromSlash(nameBase) {
t.Errorf("got: %v, expected: %v", n, filepath.FromSlash(nameBase))
}
}
}
}
func TestGcsClose(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
if !f.exists {
continue
}
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
file, err := gcsAfs.Open(name)
if err != nil {
t.Fatalf("opening %v: %v", name, err)
}
err = file.Close()
if err != nil {
t.Errorf("%v: %v", name, err)
}
err = file.Close()
if err == nil {
t.Errorf("%v: closing twice should return an error", name)
}
buf := make([]byte, 8)
n, err := file.Read(buf)
if n != 0 || err == nil {
t.Errorf("%v: could read from a closed file", name)
}
n, err = file.ReadAt(buf, 256)
if n != 0 || err == nil {
t.Errorf("%v: could readAt from a closed file", name)
}
off, err := file.Seek(0, io.SeekStart)
if off != 0 || err == nil {
t.Errorf("%v: could seek from a closed file", name)
}
}
}
}
func TestGcsOpenFile(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
file, err := gcsAfs.OpenFile(name, os.O_RDONLY, 0o400)
if !f.exists {
if (f.name != "" && !errors.Is(err, syscall.ENOENT)) ||
(f.name == "" && !errors.Is(err, ErrNoBucketInName)) {
t.Errorf("%v: got %v, expected%v", name, err, syscall.ENOENT)
}
continue
}
if err != nil {
t.Fatalf("%v: %v", name, err)
}
err = file.Close()
if err != nil {
t.Fatalf("failed to close a file \"%s\": %s", name, err)
}
_, err = gcsAfs.OpenFile(name, os.O_CREATE, 0o600)
if !errors.Is(err, syscall.EPERM) {
t.Errorf("%v: open for write: got %v, expected %v", name, err, syscall.EPERM)
}
}
}
}
func TestGcsFsStat(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, f := range files {
nameBase := filepath.Join(bucketName, f.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
if f.name == "" {
names = []string{f.name}
}
for _, name := range names {
fi, err := gcsAfs.Stat(name)
if !f.exists {
if (f.name != "" && !errors.Is(err, syscall.ENOENT)) ||
(f.name == "" && !errors.Is(err, ErrNoBucketInName)) {
t.Errorf("%v: got %v, expected%v", name, err, syscall.ENOENT)
}
continue
}
if err != nil {
t.Fatalf("stat %v: got error '%v'", name, err)
}
if isdir := fi.IsDir(); isdir != f.isdir {
t.Errorf("%v directory, got: %v, expected: %v", name, isdir, f.isdir)
}
if size := fi.Size(); size != f.size {
t.Errorf("%v size, got: %v, expected: %v", name, size, f.size)
}
}
}
}
func TestGcsReaddir(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, d := range dirs {
nameBase := filepath.Join(bucketName, d.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
for _, name := range names {
dir, err := gcsAfs.Open(name)
if err != nil {
t.Fatal(err)
}
fi, err := dir.Readdir(0)
if err != nil {
t.Fatal(err)
}
var fileNames []string
for _, f := range fi {
fileNames = append(fileNames, f.Name())
}
if !reflect.DeepEqual(fileNames, d.children) {
t.Errorf("%v: children, got '%v', expected '%v'", name, fileNames, d.children)
}
fi, err = dir.Readdir(1)
if err != nil {
t.Fatal(err)
}
fileNames = []string{}
for _, f := range fi {
fileNames = append(fileNames, f.Name())
}
if !reflect.DeepEqual(fileNames, d.children[0:1]) {
t.Errorf("%v: children, got '%v', expected '%v'", name, fileNames, d.children[0:1])
}
}
}
nameBase := filepath.Join(bucketName, "testFile")
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
for _, name := range names {
dir, err := gcsAfs.Open(name)
if err != nil {
t.Fatal(err)
}
_, err = dir.Readdir(-1)
if err != syscall.ENOTDIR {
t.Fatal("Expected error")
}
}
}
func TestGcsReaddirnames(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, d := range dirs {
nameBase := filepath.Join(bucketName, d.name)
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
for _, name := range names {
dir, err := gcsAfs.Open(name)
if err != nil {
t.Fatal(err)
}
fileNames, err := dir.Readdirnames(0)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(fileNames, d.children) {
t.Errorf("%v: children, got '%v', expected '%v'", name, fileNames, d.children)
}
fileNames, err = dir.Readdirnames(1)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(fileNames, d.children[0:1]) {
t.Errorf("%v: children, got '%v', expected '%v'", name, fileNames, d.children[0:1])
}
}
}
nameBase := filepath.Join(bucketName, "testFile")
names := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
for _, name := range names {
dir, err := gcsAfs.Open(name)
if err != nil {
t.Fatal(err)
}
_, err = dir.Readdirnames(-1)
if err != syscall.ENOTDIR {
t.Fatal("Expected error")
}
}
}
func TestGcsGlob(t *testing.T) {
createFiles(t)
defer removeFiles(t)
for _, s := range []struct {
glob string
entries []string
}{
{filepath.FromSlash("*"), []string{filepath.FromSlash("sub"), filepath.FromSlash("testDir1"), filepath.FromSlash("testFile")}},
{filepath.FromSlash("sub/*"), []string{filepath.FromSlash("sub/testDir2")}},
{filepath.FromSlash("sub/testDir2/*"), []string{filepath.FromSlash("sub/testDir2/testFile")}},
{filepath.FromSlash("testDir1/*"), []string{filepath.FromSlash("testDir1/testFile")}},
} {
nameBase := filepath.Join(bucketName, s.glob)
prefixedGlobs := []string{
nameBase,
string(os.PathSeparator) + nameBase,
}
prefixedEntries := [][]string{{}, {}}
for _, entry := range s.entries {
prefixedEntries[0] = append(prefixedEntries[0], filepath.Join(bucketName, entry))
prefixedEntries[1] = append(prefixedEntries[1], string(os.PathSeparator)+filepath.Join(bucketName, entry))
}
for i, prefixedGlob := range prefixedGlobs {
entries, err := afero.Glob(gcsAfs.Fs, prefixedGlob)
if err != nil {
t.Error(err)
}
if reflect.DeepEqual(entries, prefixedEntries[i]) {
t.Logf("glob: %s: glob ok", prefixedGlob)
} else {
t.Errorf("glob: %s: got %#v, expected %#v", prefixedGlob, entries, prefixedEntries)
}
}
}
}
func TestGcsMkdir(t *testing.T) {
t.Run("empty", func(t *testing.T) {
emptyDirName := bucketName
err := gcsAfs.Mkdir(emptyDirName, 0o755)
if err == nil {
t.Fatal("did not fail upon creation of an empty folder")
}
})
t.Run("success", func(t *testing.T) {
dirName := filepath.Join(bucketName, "a-test-dir")
var err error
err = gcsAfs.Mkdir(dirName, 0o755)
if err != nil {
t.Fatal("failed to create a folder with error", err)
}
info, err := gcsAfs.Stat(dirName)
if err != nil {
t.Fatal("failed to get info", err)
}
if !info.IsDir() {
t.Fatalf("%s: not a dir", dirName)
}
if !info.Mode().IsDir() {
t.Errorf("%s: mode is not directory", dirName)
}
if info.Mode() != os.ModeDir|0o755 {
t.Errorf("%s: wrong permissions, expected drwxr-xr-x, got %s", dirName, info.Mode())
}
err = gcsAfs.Remove(dirName)
if err != nil {
t.Fatalf("could not delete the folder %s after the test with error: %s", dirName, err)
}
})
}
func TestGcsMkdirAll(t *testing.T) {
t.Run("empty", func(t *testing.T) {
emptyDirName := bucketName
err := gcsAfs.MkdirAll(emptyDirName, 0o755)
if err == nil {
t.Fatal("did not fail upon creation of an empty folder")
}
})
t.Run("success", func(t *testing.T) {
dirName := filepath.Join(bucketName, "a/b/c")
err := gcsAfs.MkdirAll(dirName, 0o755)
if err != nil {
t.Fatal(err)
}
info, err := gcsAfs.Stat(filepath.Join(bucketName, "a"))
if err != nil {
t.Fatal(err)
}
if !info.Mode().IsDir() {
t.Errorf("%s: mode is not directory", filepath.Join(bucketName, "a"))
}
if info.Mode() != os.ModeDir|0o755 {
t.Errorf("%s: wrong permissions, expected drwxr-xr-x, got %s", filepath.Join(bucketName, "a"), info.Mode())
}
info, err = gcsAfs.Stat(filepath.Join(bucketName, "a/b"))
if err != nil {
t.Fatal(err)
}
if !info.Mode().IsDir() {
t.Errorf("%s: mode is not directory", filepath.Join(bucketName, "a/b"))
}
if info.Mode() != os.ModeDir|0o755 {
t.Errorf("%s: wrong permissions, expected drwxr-xr-x, got %s", filepath.Join(bucketName, "a/b"), info.Mode())
}
info, err = gcsAfs.Stat(dirName)
if err != nil {
t.Fatal(err)
}
if !info.Mode().IsDir() {
t.Errorf("%s: mode is not directory", dirName)
}
if info.Mode() != os.ModeDir|0o755 {
t.Errorf("%s: wrong permissions, expected drwxr-xr-x, got %s", dirName, info.Mode())
}
err = gcsAfs.RemoveAll(filepath.Join(bucketName, "a"))
if err != nil {
t.Fatalf("failed to remove the folder %s with error: %s", filepath.Join(bucketName, "a"), err)
}
})
}
func TestGcsRemoveAll(t *testing.T) {
t.Run("non-existent", func(t *testing.T) {
err := gcsAfs.RemoveAll(filepath.Join(bucketName, "a"))
if err != nil {
t.Fatal("error should be nil when removing non-existent file")
}
})
t.Run("success", func(t *testing.T) {
aDir := filepath.Join(bucketName, "a")
bDir := filepath.Join(aDir, "b")
err := gcsAfs.MkdirAll(bDir, 0o755)
if err != nil {
t.Fatal(err)
}
_, err = gcsAfs.Stat(bDir)
if err != nil {
t.Fatal(err)
}
err = gcsAfs.RemoveAll(aDir)
if err != nil {
t.Fatalf("failed to remove the folder %s with error: %s", aDir, err)
}
_, err = gcsAfs.Stat(aDir)
if err == nil {
t.Fatalf("folder %s wasn't removed", aDir)
}
})
}
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