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package graph
import (
"archive/tar"
"bytes"
"io"
"os"
"path"
"testing"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/graphdriver"
_ "github.com/docker/docker/daemon/graphdriver/vfs" // import the vfs driver so it is used in the tests
"github.com/docker/docker/graph/tags"
"github.com/docker/docker/image"
"github.com/docker/docker/trust"
"github.com/docker/docker/utils"
)
const (
testOfficialImageName = "myapp"
testOfficialImageID = "1a2d3c4d4e5fa2d2a21acea242a5e2345d3aefc3e7dfa2a2a2a21a2a2ad2d234"
testOfficialImageIDShort = "1a2d3c4d4e5f"
testPrivateImageName = "127.0.0.1:8000/privateapp"
testPrivateImageID = "5bc255f8699e4ee89ac4469266c3d11515da88fdcbde45d7b069b636ff4efd81"
testPrivateImageIDShort = "5bc255f8699e"
testPrivateImageDigest = "sha256:bc8813ea7b3603864987522f02a76101c17ad122e1c46d790efc0fca78ca7bfb"
testPrivateImageTag = "sometag"
)
func fakeTar() (io.Reader, error) {
uid := os.Getuid()
gid := os.Getgid()
content := []byte("Hello world!\n")
buf := new(bytes.Buffer)
tw := tar.NewWriter(buf)
for _, name := range []string{"/etc/postgres/postgres.conf", "/etc/passwd", "/var/log/postgres/postgres.conf"} {
hdr := new(tar.Header)
// Leaving these fields blank requires root privileges
hdr.Uid = uid
hdr.Gid = gid
hdr.Size = int64(len(content))
hdr.Name = name
if err := tw.WriteHeader(hdr); err != nil {
return nil, err
}
tw.Write([]byte(content))
}
tw.Close()
return buf, nil
}
func mkTestTagStore(root string, t *testing.T) *TagStore {
driver, err := graphdriver.New(root, nil, nil, nil)
if err != nil {
t.Fatal(err)
}
graph, err := NewGraph(root, driver, nil, nil)
if err != nil {
t.Fatal(err)
}
trust, err := trust.NewStore(root + "/trust")
if err != nil {
t.Fatal(err)
}
tagCfg := &TagStoreConfig{
Graph: graph,
Events: events.New(),
Trust: trust,
}
store, err := NewTagStore(path.Join(root, "tags"), tagCfg)
if err != nil {
t.Fatal(err)
}
officialArchive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
img := &image.Image{ID: testOfficialImageID}
if err := graph.Register(img, officialArchive); err != nil {
t.Fatal(err)
}
if err := store.Tag(testOfficialImageName, "", testOfficialImageID, false); err != nil {
t.Fatal(err)
}
privateArchive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
img = &image.Image{ID: testPrivateImageID}
if err := graph.Register(img, privateArchive); err != nil {
t.Fatal(err)
}
if err := store.Tag(testPrivateImageName, "", testPrivateImageID, false); err != nil {
t.Fatal(err)
}
if err := store.SetDigest(testPrivateImageName, testPrivateImageDigest, testPrivateImageID); err != nil {
t.Fatal(err)
}
return store
}
func TestLookupImage(t *testing.T) {
tmp, err := utils.TestDirectory("")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmp)
store := mkTestTagStore(tmp, t)
defer store.graph.driver.Cleanup()
officialLookups := []string{
testOfficialImageID,
testOfficialImageIDShort,
testOfficialImageName + ":" + testOfficialImageID,
testOfficialImageName + ":" + testOfficialImageIDShort,
testOfficialImageName,
testOfficialImageName + ":" + tags.DefaultTag,
"docker.io/" + testOfficialImageName,
"docker.io/" + testOfficialImageName + ":" + tags.DefaultTag,
"index.docker.io/" + testOfficialImageName,
"index.docker.io/" + testOfficialImageName + ":" + tags.DefaultTag,
"library/" + testOfficialImageName,
"library/" + testOfficialImageName + ":" + tags.DefaultTag,
"docker.io/library/" + testOfficialImageName,
"docker.io/library/" + testOfficialImageName + ":" + tags.DefaultTag,
"index.docker.io/library/" + testOfficialImageName,
"index.docker.io/library/" + testOfficialImageName + ":" + tags.DefaultTag,
}
privateLookups := []string{
testPrivateImageID,
testPrivateImageIDShort,
testPrivateImageName + ":" + testPrivateImageID,
testPrivateImageName + ":" + testPrivateImageIDShort,
testPrivateImageName,
testPrivateImageName + ":" + tags.DefaultTag,
}
invalidLookups := []string{
testOfficialImageName + ":" + "fail",
"fail:fail",
}
digestLookups := []string{
testPrivateImageName + "@" + testPrivateImageDigest,
}
for _, name := range officialLookups {
if img, err := store.LookupImage(name); err != nil {
t.Errorf("Error looking up %s: %s", name, err)
} else if img == nil {
t.Errorf("Expected 1 image, none found: %s", name)
} else if img.ID != testOfficialImageID {
t.Errorf("Expected ID '%s' found '%s'", testOfficialImageID, img.ID)
}
}
for _, name := range privateLookups {
if img, err := store.LookupImage(name); err != nil {
t.Errorf("Error looking up %s: %s", name, err)
} else if img == nil {
t.Errorf("Expected 1 image, none found: %s", name)
} else if img.ID != testPrivateImageID {
t.Errorf("Expected ID '%s' found '%s'", testPrivateImageID, img.ID)
}
}
for _, name := range invalidLookups {
if img, err := store.LookupImage(name); err == nil {
t.Errorf("Expected error, none found: %s", name)
} else if img != nil {
t.Errorf("Expected 0 image, 1 found: %s", name)
}
}
for _, name := range digestLookups {
if img, err := store.LookupImage(name); err != nil {
t.Errorf("Error looking up %s: %s", name, err)
} else if img == nil {
t.Errorf("Expected 1 image, none found: %s", name)
} else if img.ID != testPrivateImageID {
t.Errorf("Expected ID '%s' found '%s'", testPrivateImageID, img.ID)
}
}
}
func TestValidateDigest(t *testing.T) {
tests := []struct {
input string
expectError bool
}{
{"", true},
{"latest", true},
{"sha256:b", false},
{"tarsum+v1+sha256:bY852-_.+=", false},
{"#$%#$^:$%^#$%", true},
}
for i, test := range tests {
err := validateDigest(test.input)
gotError := err != nil
if e, a := test.expectError, gotError; e != a {
t.Errorf("%d: with input %s, expected error=%t, got %t: %s", i, test.input, test.expectError, gotError, err)
}
}
}