313 lines
6.5 KiB
Go
313 lines
6.5 KiB
Go
package docker
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import (
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"github.com/dotcloud/docker/graph"
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"io"
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"io/ioutil"
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"os"
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"os/exec"
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"os/user"
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"testing"
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)
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const testLayerPath string = "/var/lib/docker/docker-ut.tar"
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const unitTestImageName string = "busybox"
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var unitTestStoreBase string
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var srv *Server
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func nuke(docker *Docker) error {
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return os.RemoveAll(docker.root)
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}
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func CopyDirectory(source, dest string) error {
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if _, err := exec.Command("cp", "-ra", source, dest).Output(); err != nil {
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return err
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}
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return nil
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}
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func layerArchive(tarfile string) (io.Reader, error) {
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// FIXME: need to close f somewhere
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f, err := os.Open(tarfile)
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if err != nil {
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return nil, err
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}
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return f, nil
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}
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func init() {
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// Hack to run sys init during unit testing
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if SelfPath() == "/sbin/init" {
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SysInit()
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return
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}
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if usr, err := user.Current(); err != nil {
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panic(err)
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} else if usr.Uid != "0" {
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panic("docker tests needs to be run as root")
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}
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// Create a temp directory
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root, err := ioutil.TempDir("", "docker-test")
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if err != nil {
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panic(err)
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}
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unitTestStoreBase = root
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// Make it our Store root
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docker, err := NewFromDirectory(root)
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if err != nil {
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panic(err)
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}
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// Create the "Server"
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srv := &Server{
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containers: docker,
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}
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// Retrieve the Image
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if err := srv.CmdImport(os.Stdin, os.Stdout, unitTestImageName); err != nil {
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panic(err)
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}
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}
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func newTestDocker() (*Docker, error) {
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root, err := ioutil.TempDir("", "docker-test")
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if err != nil {
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return nil, err
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}
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if err := os.Remove(root); err != nil {
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return nil, err
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}
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if err := CopyDirectory(unitTestStoreBase, root); err != nil {
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panic(err)
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return nil, err
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}
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docker, err := NewFromDirectory(root)
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if err != nil {
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return nil, err
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}
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return docker, nil
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}
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func GetTestImage(docker *Docker) *graph.Image {
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imgs, err := docker.graph.All()
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if err != nil {
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panic(err)
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} else if len(imgs) < 1 {
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panic("GASP")
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}
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return imgs[0]
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}
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func TestCreate(t *testing.T) {
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docker, err := newTestDocker()
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if err != nil {
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t.Fatal(err)
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}
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defer nuke(docker)
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// Make sure we start we 0 containers
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if len(docker.List()) != 0 {
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t.Errorf("Expected 0 containers, %v found", len(docker.List()))
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}
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container, err := docker.Create(
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"ls",
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[]string{"-al"},
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GetTestImage(docker).Id,
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&Config{},
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)
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if err != nil {
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t.Fatal(err)
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}
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defer func() {
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if err := docker.Destroy(container); err != nil {
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t.Error(err)
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}
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}()
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// Make sure we can find the newly created container with List()
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if len(docker.List()) != 1 {
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t.Errorf("Expected 1 container, %v found", len(docker.List()))
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}
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// Make sure the container List() returns is the right one
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if docker.List()[0].Id != container.Id {
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t.Errorf("Unexpected container %v returned by List", docker.List()[0])
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}
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// Make sure we can get the container with Get()
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if docker.Get(container.Id) == nil {
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t.Errorf("Unable to get newly created container")
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}
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// Make sure it is the right container
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if docker.Get(container.Id) != container {
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t.Errorf("Get() returned the wrong container")
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}
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// Make sure Exists returns it as existing
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if !docker.Exists(container.Id) {
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t.Errorf("Exists() returned false for a newly created container")
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}
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}
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func TestDestroy(t *testing.T) {
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docker, err := newTestDocker()
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if err != nil {
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t.Fatal(err)
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}
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defer nuke(docker)
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container, err := docker.Create(
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"ls",
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[]string{"-al"},
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GetTestImage(docker).Id,
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&Config{},
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)
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if err != nil {
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t.Fatal(err)
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}
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// Destroy
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if err := docker.Destroy(container); err != nil {
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t.Error(err)
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}
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// Make sure docker.Exists() behaves correctly
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if docker.Exists("test_destroy") {
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t.Errorf("Exists() returned true")
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}
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// Make sure docker.List() doesn't list the destroyed container
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if len(docker.List()) != 0 {
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t.Errorf("Expected 0 container, %v found", len(docker.List()))
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}
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// Make sure docker.Get() refuses to return the unexisting container
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if docker.Get(container.Id) != nil {
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t.Errorf("Unable to get newly created container")
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}
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// Make sure the container root directory does not exist anymore
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_, err = os.Stat(container.root)
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if err == nil || !os.IsNotExist(err) {
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t.Errorf("Container root directory still exists after destroy")
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}
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// Test double destroy
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if err := docker.Destroy(container); err == nil {
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// It should have failed
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t.Errorf("Double destroy did not fail")
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}
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}
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func TestGet(t *testing.T) {
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docker, err := newTestDocker()
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if err != nil {
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t.Fatal(err)
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}
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defer nuke(docker)
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container1, err := docker.Create(
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"ls",
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[]string{"-al"},
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GetTestImage(docker).Id,
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&Config{},
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)
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if err != nil {
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t.Fatal(err)
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}
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defer docker.Destroy(container1)
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container2, err := docker.Create(
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"ls",
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[]string{"-al"},
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GetTestImage(docker).Id,
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&Config{},
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)
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if err != nil {
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t.Fatal(err)
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}
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defer docker.Destroy(container2)
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container3, err := docker.Create(
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"ls",
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[]string{"-al"},
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GetTestImage(docker).Id,
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&Config{},
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)
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if err != nil {
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t.Fatal(err)
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}
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defer docker.Destroy(container3)
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if docker.Get(container1.Id) != container1 {
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t.Errorf("Get(test1) returned %v while expecting %v", docker.Get(container1.Id), container1)
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}
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if docker.Get(container2.Id) != container2 {
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t.Errorf("Get(test2) returned %v while expecting %v", docker.Get(container2.Id), container2)
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}
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if docker.Get(container3.Id) != container3 {
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t.Errorf("Get(test3) returned %v while expecting %v", docker.Get(container3.Id), container3)
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}
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}
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func TestRestore(t *testing.T) {
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root, err := ioutil.TempDir("", "docker-test")
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if err != nil {
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t.Fatal(err)
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}
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if err := os.Remove(root); err != nil {
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t.Fatal(err)
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}
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if err := CopyDirectory(unitTestStoreBase, root); err != nil {
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t.Fatal(err)
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}
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docker1, err := NewFromDirectory(root)
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if err != nil {
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t.Fatal(err)
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}
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// Create a container with one instance of docker
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container1, err := docker1.Create(
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"ls",
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[]string{"-al"},
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GetTestImage(docker1).Id,
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&Config{},
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)
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if err != nil {
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t.Fatal(err)
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}
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defer docker1.Destroy(container1)
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if len(docker1.List()) != 1 {
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t.Errorf("Expected 1 container, %v found", len(docker1.List()))
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}
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if err := container1.Run(); err != nil {
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t.Fatal(err)
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}
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// Here are are simulating a docker restart - that is, reloading all containers
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// from scratch
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docker2, err := NewFromDirectory(root)
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if err != nil {
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t.Fatal(err)
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}
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defer nuke(docker2)
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if len(docker2.List()) != 1 {
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t.Errorf("Expected 1 container, %v found", len(docker2.List()))
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}
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container2 := docker2.Get(container1.Id)
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if container2 == nil {
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t.Fatal("Unable to Get container")
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}
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if err := container2.Run(); err != nil {
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t.Fatal(err)
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}
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}
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