package docker import ( "io" "io/ioutil" "os" "os/exec" "os/user" "testing" ) const testLayerPath string = "/var/lib/docker/docker-ut.tar" const unitTestImageName string = "http://get.docker.io/images/busybox" var unitTestStoreBase string var srv *Server func nuke(runtime *Runtime) error { return os.RemoveAll(runtime.root) } func CopyDirectory(source, dest string) error { if _, err := exec.Command("cp", "-ra", source, dest).Output(); err != nil { return err } return nil } func layerArchive(tarfile string) (io.Reader, error) { // FIXME: need to close f somewhere f, err := os.Open(tarfile) if err != nil { return nil, err } return f, nil } func init() { // Hack to run sys init during unit testing if SelfPath() == "/sbin/init" { SysInit() return } if usr, err := user.Current(); err != nil { panic(err) } else if usr.Uid != "0" { panic("docker tests needs to be run as root") } // Create a temp directory root, err := ioutil.TempDir("", "docker-test") if err != nil { panic(err) } unitTestStoreBase = root // Make it our Store root runtime, err := NewRuntimeFromDirectory(root) if err != nil { panic(err) } // Create the "Server" srv := &Server{ runtime: runtime, } // Retrieve the Image if err := srv.CmdImport(os.Stdin, os.Stdout, unitTestImageName); err != nil { panic(err) } } func newTestRuntime() (*Runtime, error) { root, err := ioutil.TempDir("", "docker-test") if err != nil { return nil, err } if err := os.Remove(root); err != nil { return nil, err } if err := CopyDirectory(unitTestStoreBase, root); err != nil { panic(err) return nil, err } runtime, err := NewRuntimeFromDirectory(root) if err != nil { return nil, err } return runtime, nil } func GetTestImage(runtime *Runtime) *Image { imgs, err := runtime.graph.All() if err != nil { panic(err) } else if len(imgs) < 1 { panic("GASP") } return imgs[0] } func TestRuntimeCreate(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) // Make sure we start we 0 containers if len(runtime.List()) != 0 { t.Errorf("Expected 0 containers, %v found", len(runtime.List())) } container, err := runtime.Create( "ls", []string{"-al"}, GetTestImage(runtime).Id, &Config{}, ) if err != nil { t.Fatal(err) } defer func() { if err := runtime.Destroy(container); err != nil { t.Error(err) } }() // Make sure we can find the newly created container with List() if len(runtime.List()) != 1 { t.Errorf("Expected 1 container, %v found", len(runtime.List())) } // Make sure the container List() returns is the right one if runtime.List()[0].Id != container.Id { t.Errorf("Unexpected container %v returned by List", runtime.List()[0]) } // Make sure we can get the container with Get() if runtime.Get(container.Id) == nil { t.Errorf("Unable to get newly created container") } // Make sure it is the right container if runtime.Get(container.Id) != container { t.Errorf("Get() returned the wrong container") } // Make sure Exists returns it as existing if !runtime.Exists(container.Id) { t.Errorf("Exists() returned false for a newly created container") } } func TestDestroy(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) container, err := runtime.Create( "ls", []string{"-al"}, GetTestImage(runtime).Id, &Config{}, ) if err != nil { t.Fatal(err) } // Destroy if err := runtime.Destroy(container); err != nil { t.Error(err) } // Make sure runtime.Exists() behaves correctly if runtime.Exists("test_destroy") { t.Errorf("Exists() returned true") } // Make sure runtime.List() doesn't list the destroyed container if len(runtime.List()) != 0 { t.Errorf("Expected 0 container, %v found", len(runtime.List())) } // Make sure runtime.Get() refuses to return the unexisting container if runtime.Get(container.Id) != nil { t.Errorf("Unable to get newly created container") } // Make sure the container root directory does not exist anymore _, err = os.Stat(container.root) if err == nil || !os.IsNotExist(err) { t.Errorf("Container root directory still exists after destroy") } // Test double destroy if err := runtime.Destroy(container); err == nil { // It should have failed t.Errorf("Double destroy did not fail") } } func TestGet(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) container1, err := runtime.Create( "ls", []string{"-al"}, GetTestImage(runtime).Id, &Config{}, ) if err != nil { t.Fatal(err) } defer runtime.Destroy(container1) container2, err := runtime.Create( "ls", []string{"-al"}, GetTestImage(runtime).Id, &Config{}, ) if err != nil { t.Fatal(err) } defer runtime.Destroy(container2) container3, err := runtime.Create( "ls", []string{"-al"}, GetTestImage(runtime).Id, &Config{}, ) if err != nil { t.Fatal(err) } defer runtime.Destroy(container3) if runtime.Get(container1.Id) != container1 { t.Errorf("Get(test1) returned %v while expecting %v", runtime.Get(container1.Id), container1) } if runtime.Get(container2.Id) != container2 { t.Errorf("Get(test2) returned %v while expecting %v", runtime.Get(container2.Id), container2) } if runtime.Get(container3.Id) != container3 { t.Errorf("Get(test3) returned %v while expecting %v", runtime.Get(container3.Id), container3) } } func TestRestore(t *testing.T) { root, err := ioutil.TempDir("", "docker-test") if err != nil { t.Fatal(err) } if err := os.Remove(root); err != nil { t.Fatal(err) } if err := CopyDirectory(unitTestStoreBase, root); err != nil { t.Fatal(err) } runtime1, err := NewRuntimeFromDirectory(root) if err != nil { t.Fatal(err) } // Create a container with one instance of docker container1, err := runtime1.Create( "ls", []string{"-al"}, GetTestImage(runtime1).Id, &Config{}, ) if err != nil { t.Fatal(err) } defer runtime1.Destroy(container1) if len(runtime1.List()) != 1 { t.Errorf("Expected 1 container, %v found", len(runtime1.List())) } if err := container1.Run(); err != nil { t.Fatal(err) } // Here are are simulating a docker restart - that is, reloading all containers // from scratch runtime2, err := NewRuntimeFromDirectory(root) if err != nil { t.Fatal(err) } defer nuke(runtime2) if len(runtime2.List()) != 1 { t.Errorf("Expected 1 container, %v found", len(runtime2.List())) } container2 := runtime2.Get(container1.Id) if container2 == nil { t.Fatal("Unable to Get container") } if err := container2.Run(); err != nil { t.Fatal(err) } }