distribution/registry/storage/driver/gcs/gcs_test.go

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// +build include_gcs
package gcs
import (
"io/ioutil"
"os"
"testing"
"fmt"
ctx "github.com/docker/distribution/context"
storagedriver "github.com/docker/distribution/registry/storage/driver"
"github.com/docker/distribution/registry/storage/driver/testsuites"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/api/googleapi"
"google.golang.org/cloud/storage"
"gopkg.in/check.v1"
)
// Hook up gocheck into the "go test" runner.
func Test(t *testing.T) { check.TestingT(t) }
var gcsDriverConstructor func(rootDirectory string) (storagedriver.StorageDriver, error)
var skipGCS func() string
func init() {
bucket := os.Getenv("REGISTRY_STORAGE_GCS_BUCKET")
credentials := os.Getenv("GOOGLE_APPLICATION_CREDENTIALS")
// Skip GCS storage driver tests if environment variable parameters are not provided
skipGCS = func() string {
if bucket == "" || credentials == "" {
return "The following environment variables must be set to enable these tests: REGISTRY_STORAGE_GCS_BUCKET, GOOGLE_APPLICATION_CREDENTIALS"
}
return ""
}
if skipGCS() != "" {
return
}
root, err := ioutil.TempDir("", "driver-")
if err != nil {
panic(err)
}
defer os.Remove(root)
var ts oauth2.TokenSource
var email string
var privateKey []byte
ts, err = google.DefaultTokenSource(ctx.Background(), storage.ScopeFullControl)
if err != nil {
// Assume that the file contents are within the environment variable since it exists
// but does not contain a valid file path
jwtConfig, err := google.JWTConfigFromJSON([]byte(credentials), storage.ScopeFullControl)
if err != nil {
panic(fmt.Sprintf("Error reading JWT config : %s", err))
}
email = jwtConfig.Email
privateKey = []byte(jwtConfig.PrivateKey)
if len(privateKey) == 0 {
panic("Error reading JWT config : missing private_key property")
}
if email == "" {
panic("Error reading JWT config : missing client_email property")
}
ts = jwtConfig.TokenSource(ctx.Background())
}
gcsDriverConstructor = func(rootDirectory string) (storagedriver.StorageDriver, error) {
parameters := driverParameters{
bucket: bucket,
rootDirectory: root,
email: email,
privateKey: privateKey,
client: oauth2.NewClient(ctx.Background(), ts),
chunkSize: defaultChunkSize,
}
return New(parameters)
}
testsuites.RegisterSuite(func() (storagedriver.StorageDriver, error) {
return gcsDriverConstructor(root)
}, skipGCS)
}
// Test Committing a FileWriter without having called Write
func TestCommitEmpty(t *testing.T) {
if skipGCS() != "" {
t.Skip(skipGCS())
}
validRoot, err := ioutil.TempDir("", "driver-")
if err != nil {
t.Fatalf("unexpected error creating temporary directory: %v", err)
}
defer os.Remove(validRoot)
driver, err := gcsDriverConstructor(validRoot)
if err != nil {
t.Fatalf("unexpected error creating rooted driver: %v", err)
}
filename := "/test"
ctx := ctx.Background()
writer, err := driver.Writer(ctx, filename, false)
defer driver.Delete(ctx, filename)
if err != nil {
t.Fatalf("driver.Writer: unexpected error: %v", err)
}
err = writer.Commit()
if err != nil {
t.Fatalf("writer.Commit: unexpected error: %v", err)
}
err = writer.Close()
if err != nil {
t.Fatalf("writer.Close: unexpected error: %v", err)
}
if writer.Size() != 0 {
t.Fatalf("writer.Size: %d != 0", writer.Size())
}
readContents, err := driver.GetContent(ctx, filename)
if err != nil {
t.Fatalf("driver.GetContent: unexpected error: %v", err)
}
if len(readContents) != 0 {
t.Fatalf("len(driver.GetContent(..)): %d != 0", len(readContents))
}
}
// Test Committing a FileWriter after having written exactly
// defaultChunksize bytes.
func TestCommit(t *testing.T) {
if skipGCS() != "" {
t.Skip(skipGCS())
}
validRoot, err := ioutil.TempDir("", "driver-")
if err != nil {
t.Fatalf("unexpected error creating temporary directory: %v", err)
}
defer os.Remove(validRoot)
driver, err := gcsDriverConstructor(validRoot)
if err != nil {
t.Fatalf("unexpected error creating rooted driver: %v", err)
}
filename := "/test"
ctx := ctx.Background()
contents := make([]byte, defaultChunkSize)
writer, err := driver.Writer(ctx, filename, false)
defer driver.Delete(ctx, filename)
if err != nil {
t.Fatalf("driver.Writer: unexpected error: %v", err)
}
_, err = writer.Write(contents)
if err != nil {
t.Fatalf("writer.Write: unexpected error: %v", err)
}
err = writer.Commit()
if err != nil {
t.Fatalf("writer.Commit: unexpected error: %v", err)
}
err = writer.Close()
if err != nil {
t.Fatalf("writer.Close: unexpected error: %v", err)
}
if writer.Size() != int64(len(contents)) {
t.Fatalf("writer.Size: %d != %d", writer.Size(), len(contents))
}
readContents, err := driver.GetContent(ctx, filename)
if err != nil {
t.Fatalf("driver.GetContent: unexpected error: %v", err)
}
if len(readContents) != len(contents) {
t.Fatalf("len(driver.GetContent(..)): %d != %d", len(readContents), len(contents))
}
}
func TestRetry(t *testing.T) {
if skipGCS() != "" {
t.Skip(skipGCS())
}
assertError := func(expected string, observed error) {
observedMsg := "<nil>"
if observed != nil {
observedMsg = observed.Error()
}
if observedMsg != expected {
t.Fatalf("expected %v, observed %v\n", expected, observedMsg)
}
}
err := retry(func() error {
return &googleapi.Error{
Code: 503,
Message: "google api error",
}
})
assertError("googleapi: Error 503: google api error", err)
err = retry(func() error {
return &googleapi.Error{
Code: 404,
Message: "google api error",
}
})
assertError("googleapi: Error 404: google api error", err)
err = retry(func() error {
return fmt.Errorf("error")
})
assertError("error", err)
}
func TestEmptyRootList(t *testing.T) {
if skipGCS() != "" {
t.Skip(skipGCS())
}
validRoot, err := ioutil.TempDir("", "driver-")
if err != nil {
t.Fatalf("unexpected error creating temporary directory: %v", err)
}
defer os.Remove(validRoot)
rootedDriver, err := gcsDriverConstructor(validRoot)
if err != nil {
t.Fatalf("unexpected error creating rooted driver: %v", err)
}
emptyRootDriver, err := gcsDriverConstructor("")
if err != nil {
t.Fatalf("unexpected error creating empty root driver: %v", err)
}
slashRootDriver, err := gcsDriverConstructor("/")
if err != nil {
t.Fatalf("unexpected error creating slash root driver: %v", err)
}
filename := "/test"
contents := []byte("contents")
ctx := ctx.Background()
err = rootedDriver.PutContent(ctx, filename, contents)
if err != nil {
t.Fatalf("unexpected error creating content: %v", err)
}
defer func() {
err := rootedDriver.Delete(ctx, filename)
if err != nil {
t.Fatalf("failed to remove %v due to %v\n", filename, err)
}
}()
keys, err := emptyRootDriver.List(ctx, "/")
for _, path := range keys {
if !storagedriver.PathRegexp.MatchString(path) {
t.Fatalf("unexpected string in path: %q != %q", path, storagedriver.PathRegexp)
}
}
keys, err = slashRootDriver.List(ctx, "/")
for _, path := range keys {
if !storagedriver.PathRegexp.MatchString(path) {
t.Fatalf("unexpected string in path: %q != %q", path, storagedriver.PathRegexp)
}
}
}
// TestMoveDirectory checks that moving a directory returns an error.
func TestMoveDirectory(t *testing.T) {
if skipGCS() != "" {
t.Skip(skipGCS())
}
validRoot, err := ioutil.TempDir("", "driver-")
if err != nil {
t.Fatalf("unexpected error creating temporary directory: %v", err)
}
defer os.Remove(validRoot)
driver, err := gcsDriverConstructor(validRoot)
if err != nil {
t.Fatalf("unexpected error creating rooted driver: %v", err)
}
ctx := ctx.Background()
contents := []byte("contents")
// Create a regular file.
err = driver.PutContent(ctx, "/parent/dir/foo", contents)
if err != nil {
t.Fatalf("unexpected error creating content: %v", err)
}
defer func() {
err := driver.Delete(ctx, "/parent")
if err != nil {
t.Fatalf("failed to remove /parent due to %v\n", err)
}
}()
err = driver.Move(ctx, "/parent/dir", "/parent/other")
if err == nil {
t.Fatalf("Moving directory /parent/dir /parent/other should have return a non-nil error\n")
}
}