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moby--moby/integration/graph_test.go
Victor Vieux b3ee9ac74e update go import path and libcontainer
Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
2014-07-24 22:19:50 +00:00

318 lines
7.5 KiB
Go

package docker
import (
"errors"
"github.com/docker/docker/archive"
"github.com/docker/docker/daemon/graphdriver"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/graph"
"github.com/docker/docker/image"
"github.com/docker/docker/utils"
"io"
"io/ioutil"
"os"
"path"
"testing"
"time"
)
func TestMount(t *testing.T) {
graph, driver := tempGraph(t)
defer os.RemoveAll(graph.Root)
defer driver.Cleanup()
archive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
image, err := graph.Create(archive, "", "", "Testing", "", nil, nil)
if err != nil {
t.Fatal(err)
}
tmp, err := ioutil.TempDir("", "docker-test-graph-mount-")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmp)
rootfs := path.Join(tmp, "rootfs")
if err := os.MkdirAll(rootfs, 0700); err != nil {
t.Fatal(err)
}
rw := path.Join(tmp, "rw")
if err := os.MkdirAll(rw, 0700); err != nil {
t.Fatal(err)
}
if _, err := driver.Get(image.ID, ""); err != nil {
t.Fatal(err)
}
}
func TestInit(t *testing.T) {
graph, _ := tempGraph(t)
defer nukeGraph(graph)
// Root should exist
if _, err := os.Stat(graph.Root); err != nil {
t.Fatal(err)
}
// Map() should be empty
if l, err := graph.Map(); err != nil {
t.Fatal(err)
} else if len(l) != 0 {
t.Fatalf("len(Map()) should return %d, not %d", 0, len(l))
}
}
// Test that Register can be interrupted cleanly without side effects
func TestInterruptedRegister(t *testing.T) {
graph, _ := tempGraph(t)
defer nukeGraph(graph)
badArchive, w := io.Pipe() // Use a pipe reader as a fake archive which never yields data
image := &image.Image{
ID: utils.GenerateRandomID(),
Comment: "testing",
Created: time.Now(),
}
w.CloseWithError(errors.New("But I'm not a tarball!")) // (Nobody's perfect, darling)
graph.Register(nil, badArchive, image)
if _, err := graph.Get(image.ID); err == nil {
t.Fatal("Image should not exist after Register is interrupted")
}
// Registering the same image again should succeed if the first register was interrupted
goodArchive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
if err := graph.Register(nil, goodArchive, image); err != nil {
t.Fatal(err)
}
}
// FIXME: Do more extensive tests (ex: create multiple, delete, recreate;
// create multiple, check the amount of images and paths, etc..)
func TestGraphCreate(t *testing.T) {
graph, _ := tempGraph(t)
defer nukeGraph(graph)
archive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
img, err := graph.Create(archive, "", "", "Testing", "", nil, nil)
if err != nil {
t.Fatal(err)
}
if err := utils.ValidateID(img.ID); err != nil {
t.Fatal(err)
}
if img.Comment != "Testing" {
t.Fatalf("Wrong comment: should be '%s', not '%s'", "Testing", img.Comment)
}
if img.DockerVersion != dockerversion.VERSION {
t.Fatalf("Wrong docker_version: should be '%s', not '%s'", dockerversion.VERSION, img.DockerVersion)
}
images, err := graph.Map()
if err != nil {
t.Fatal(err)
} else if l := len(images); l != 1 {
t.Fatalf("Wrong number of images. Should be %d, not %d", 1, l)
}
if images[img.ID] == nil {
t.Fatalf("Could not find image with id %s", img.ID)
}
}
func TestRegister(t *testing.T) {
graph, _ := tempGraph(t)
defer nukeGraph(graph)
archive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
image := &image.Image{
ID: utils.GenerateRandomID(),
Comment: "testing",
Created: time.Now(),
}
err = graph.Register(nil, archive, image)
if err != nil {
t.Fatal(err)
}
if images, err := graph.Map(); err != nil {
t.Fatal(err)
} else if l := len(images); l != 1 {
t.Fatalf("Wrong number of images. Should be %d, not %d", 1, l)
}
if resultImg, err := graph.Get(image.ID); err != nil {
t.Fatal(err)
} else {
if resultImg.ID != image.ID {
t.Fatalf("Wrong image ID. Should be '%s', not '%s'", image.ID, resultImg.ID)
}
if resultImg.Comment != image.Comment {
t.Fatalf("Wrong image comment. Should be '%s', not '%s'", image.Comment, resultImg.Comment)
}
}
}
// Test that an image can be deleted by its shorthand prefix
func TestDeletePrefix(t *testing.T) {
graph, _ := tempGraph(t)
defer nukeGraph(graph)
img := createTestImage(graph, t)
if err := graph.Delete(utils.TruncateID(img.ID)); err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 0)
}
func createTestImage(graph *graph.Graph, t *testing.T) *image.Image {
archive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
img, err := graph.Create(archive, "", "", "Test image", "", nil, nil)
if err != nil {
t.Fatal(err)
}
return img
}
func TestDelete(t *testing.T) {
graph, _ := tempGraph(t)
defer nukeGraph(graph)
archive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 0)
img, err := graph.Create(archive, "", "", "Bla bla", "", nil, nil)
if err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 1)
if err := graph.Delete(img.ID); err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 0)
archive, err = fakeTar()
if err != nil {
t.Fatal(err)
}
// Test 2 create (same name) / 1 delete
img1, err := graph.Create(archive, "", "", "Testing", "", nil, nil)
if err != nil {
t.Fatal(err)
}
archive, err = fakeTar()
if err != nil {
t.Fatal(err)
}
if _, err = graph.Create(archive, "", "", "Testing", "", nil, nil); err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 2)
if err := graph.Delete(img1.ID); err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 1)
// Test delete wrong name
if err := graph.Delete("Not_foo"); err == nil {
t.Fatalf("Deleting wrong ID should return an error")
}
assertNImages(graph, t, 1)
archive, err = fakeTar()
if err != nil {
t.Fatal(err)
}
// Test delete twice (pull -> rm -> pull -> rm)
if err := graph.Register(nil, archive, img1); err != nil {
t.Fatal(err)
}
if err := graph.Delete(img1.ID); err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 1)
}
func TestByParent(t *testing.T) {
archive1, _ := fakeTar()
archive2, _ := fakeTar()
archive3, _ := fakeTar()
graph, _ := tempGraph(t)
defer nukeGraph(graph)
parentImage := &image.Image{
ID: utils.GenerateRandomID(),
Comment: "parent",
Created: time.Now(),
Parent: "",
}
childImage1 := &image.Image{
ID: utils.GenerateRandomID(),
Comment: "child1",
Created: time.Now(),
Parent: parentImage.ID,
}
childImage2 := &image.Image{
ID: utils.GenerateRandomID(),
Comment: "child2",
Created: time.Now(),
Parent: parentImage.ID,
}
_ = graph.Register(nil, archive1, parentImage)
_ = graph.Register(nil, archive2, childImage1)
_ = graph.Register(nil, archive3, childImage2)
byParent, err := graph.ByParent()
if err != nil {
t.Fatal(err)
}
numChildren := len(byParent[parentImage.ID])
if numChildren != 2 {
t.Fatalf("Expected 2 children, found %d", numChildren)
}
}
/*
* HELPER FUNCTIONS
*/
func assertNImages(graph *graph.Graph, t *testing.T, n int) {
if images, err := graph.Map(); err != nil {
t.Fatal(err)
} else if actualN := len(images); actualN != n {
t.Fatalf("Expected %d images, found %d", n, actualN)
}
}
func tempGraph(t *testing.T) (*graph.Graph, graphdriver.Driver) {
tmp, err := ioutil.TempDir("", "docker-graph-")
if err != nil {
t.Fatal(err)
}
driver, err := graphdriver.New(tmp, nil)
if err != nil {
t.Fatal(err)
}
graph, err := graph.NewGraph(tmp, driver)
if err != nil {
t.Fatal(err)
}
return graph, driver
}
func nukeGraph(graph *graph.Graph) {
graph.Driver().Cleanup()
os.RemoveAll(graph.Root)
}
func testArchive(t *testing.T) archive.Archive {
archive, err := fakeTar()
if err != nil {
t.Fatal(err)
}
return archive
}