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package image
import (
"context"
"fmt"
"io"
"io/ioutil"
"os"
"testing"
"github.com/containers/storage"
"github.com/opencontainers/go-digest"
"github.com/stretchr/testify/assert"
)
var (
bbNames = []string{"docker.io/library/busybox:latest", "docker.io/library/busybox", "docker.io/busybox:latest", "docker.io/busybox", "busybox:latest", "busybox"}
bbGlibcNames = []string{"docker.io/library/busybox:glibc", "docker.io/busybox:glibc", "busybox:glibc"}
fedoraNames = []string{"registry.fedoraproject.org/fedora-minimal:latest", "registry.fedoraproject.org/fedora-minimal", "fedora-minimal:latest", "fedora-minimal"}
)
type localImageTest struct {
fqname, taggedName string
img *Image
names []string
}
// make a temporary directory for the runtime
func mkWorkDir() (string, error) {
return ioutil.TempDir("", "podman-test")
}
// shutdown the runtime and clean behind it
func cleanup(workdir string, ir *Runtime) {
if err := ir.Shutdown(false); err != nil {
fmt.Println(err)
os.Exit(1)
}
err := os.RemoveAll(workdir)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func makeLocalMatrix(b, bg *Image) ([]localImageTest, error) {
var l []localImageTest
// busybox
busybox := localImageTest{
fqname: "docker.io/library/busybox:latest",
taggedName: "bb:latest",
}
busybox.img = b
busybox.names = b.Names()
busybox.names = append(busybox.names, []string{"bb:latest", "bb", b.ID(), b.ID()[0:7], fmt.Sprintf("busybox@%s", b.Digest())}...)
// busybox-glibc
busyboxGlibc := localImageTest{
fqname: "docker.io/library/busybox:glibc",
taggedName: "bb:glibc",
}
busyboxGlibc.img = bg
busyboxGlibc.names = bbGlibcNames
l = append(l, busybox, busyboxGlibc)
return l, nil
}
// TestImage_NewFromLocal tests finding the image locally by various names,
// tags, and aliases
func TestImage_NewFromLocal(t *testing.T) {
if os.Geteuid() != 0 { // containers/storage requires root access
t.Skipf("Test not running as root")
}
workdir, err := mkWorkDir()
assert.NoError(t, err)
so := storage.StoreOptions{
RunRoot: workdir,
GraphRoot: workdir,
}
var writer io.Writer
writer = os.Stdout
// Need images to be present for this test
ir, err := NewImageRuntimeFromOptions(so)
assert.NoError(t, err)
bb, err := ir.New(context.Background(), "docker.io/library/busybox:latest", "", "", writer, nil, SigningOptions{}, false)
assert.NoError(t, err)
bbglibc, err := ir.New(context.Background(), "docker.io/library/busybox:glibc", "", "", writer, nil, SigningOptions{}, false)
assert.NoError(t, err)
tm, err := makeLocalMatrix(bb, bbglibc)
assert.NoError(t, err)
for _, image := range tm {
// tag our images
image.img.TagImage(image.taggedName)
assert.NoError(t, err)
for _, name := range image.names {
newImage, err := ir.NewFromLocal(name)
assert.NoError(t, err)
assert.Equal(t, newImage.ID(), image.img.ID())
}
}
// Shutdown the runtime and remove the temporary storage
cleanup(workdir, ir)
}
// TestImage_New tests pulling the image by various names, tags, and from
// different registries
func TestImage_New(t *testing.T) {
if os.Geteuid() != 0 { // containers/storage requires root access
t.Skipf("Test not running as root")
}
var names []string
workdir, err := mkWorkDir()
assert.NoError(t, err)
so := storage.StoreOptions{
RunRoot: workdir,
GraphRoot: workdir,
}
ir, err := NewImageRuntimeFromOptions(so)
assert.NoError(t, err)
// Build the list of pull names
names = append(names, bbNames...)
names = append(names, fedoraNames...)
var writer io.Writer
writer = os.Stdout
// Iterate over the names and delete the image
// after the pull
for _, img := range names {
newImage, err := ir.New(context.Background(), img, "", "", writer, nil, SigningOptions{}, false)
assert.NoError(t, err)
assert.NotEqual(t, newImage.ID(), "")
err = newImage.Remove(false)
assert.NoError(t, err)
}
// Shutdown the runtime and remove the temporary storage
cleanup(workdir, ir)
}
// TestImage_MatchRepoTag tests the various inputs we need to match
// against an image's reponames
func TestImage_MatchRepoTag(t *testing.T) {
if os.Geteuid() != 0 { // containers/storage requires root access
t.Skipf("Test not running as root")
}
//Set up
workdir, err := mkWorkDir()
assert.NoError(t, err)
so := storage.StoreOptions{
RunRoot: workdir,
GraphRoot: workdir,
}
ir, err := NewImageRuntimeFromOptions(so)
assert.NoError(t, err)
newImage, err := ir.New(context.Background(), "busybox", "", "", os.Stdout, nil, SigningOptions{}, false)
assert.NoError(t, err)
err = newImage.TagImage("foo:latest")
assert.NoError(t, err)
err = newImage.TagImage("foo:bar")
assert.NoError(t, err)
// Tests start here.
for _, name := range bbNames {
repoTag, err := newImage.MatchRepoTag(name)
assert.NoError(t, err)
assert.Equal(t, "docker.io/library/busybox:latest", repoTag)
}
// Test against tagged images of busybox
// foo should resolve to foo:latest
repoTag, err := newImage.MatchRepoTag("foo")
assert.NoError(t, err)
assert.Equal(t, "localhost/foo:latest", repoTag)
// foo:bar should resolve to foo:bar
repoTag, err = newImage.MatchRepoTag("foo:bar")
assert.NoError(t, err)
assert.Equal(t, "localhost/foo:bar", repoTag)
// Shutdown the runtime and remove the temporary storage
cleanup(workdir, ir)
}
// TestImage_RepoDigests tests RepoDigest generation.
func TestImage_RepoDigests(t *testing.T) {
dgst, err := digest.Parse("sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc")
if err != nil {
t.Fatal(err)
}
for _, test := range []struct {
name string
names []string
expected []string
}{
{
name: "empty",
names: []string{},
expected: nil,
},
{
name: "tagged",
names: []string{"docker.io/library/busybox:latest"},
expected: []string{"docker.io/library/busybox@sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc"},
},
{
name: "digest",
names: []string{"docker.io/library/busybox@sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc"},
expected: []string{"docker.io/library/busybox@sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc"},
},
} {
t.Run(test.name, func(t *testing.T) {
image := &Image{
image: &storage.Image{
Names: test.names,
Digest: dgst,
},
}
actual, err := image.RepoDigests()
if err != nil {
t.Fatal(err)
}
assert.Equal(t, test.expected, actual)
})
}
}
// Test_splitString tests the splitString function in image that
// takes input and splits on / and returns the last array item
func Test_splitString(t *testing.T) {
assert.Equal(t, splitString("foo/bar"), "bar")
assert.Equal(t, splitString("a/foo/bar"), "bar")
assert.Equal(t, splitString("bar"), "bar")
}
// Test_stripSha256 tests test the stripSha256 function which removes
// the prefix "sha256:" from a string if it is present
func Test_stripSha256(t *testing.T) {
assert.Equal(t, stripSha256(""), "")
assert.Equal(t, stripSha256("test1"), "test1")
assert.Equal(t, stripSha256("sha256:9110ae7f579f35ee0c3938696f23fe0f5fbe641738ea52eb83c2df7e9995fa17"), "9110ae7f579f35ee0c3938696f23fe0f5fbe641738ea52eb83c2df7e9995fa17")
assert.Equal(t, stripSha256("sha256:9110ae7f"), "9110ae7f")
assert.Equal(t, stripSha256("sha256:"), "sha256:")
assert.Equal(t, stripSha256("sha256:a"), "a")
}
func TestNormalizeTag(t *testing.T) {
const digestSuffix = "@sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
for _, c := range []struct{ input, expected string }{
{"#", ""}, // Clearly invalid
{"example.com/busybox", "example.com/busybox:latest"}, // Qualified name-only
{"example.com/busybox:notlatest", "example.com/busybox:notlatest"}, // Qualified name:tag
{"example.com/busybox" + digestSuffix, "example.com/busybox" + digestSuffix + ":none"}, // Qualified name@digest; FIXME: The result is not even syntactically valid!
{"example.com/busybox:notlatest" + digestSuffix, "example.com/busybox:notlatest" + digestSuffix}, // Qualified name:tag@digest
{"busybox:latest", "localhost/busybox:latest"}, // Unqualified name-only
{"ns/busybox:latest", "localhost/ns/busybox:latest"}, // Unqualified with a dot-less namespace
{"docker.io/busybox:latest", "docker.io/library/busybox:latest"}, // docker.io without /library/
} {
res, err := normalizeTag(c.input)
if c.expected == "" {
assert.Error(t, err, c.input)
} else {
assert.NoError(t, err, c.input)
assert.Equal(t, c.expected, res)
}
}
}
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