mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
358 lines
9.6 KiB
Go
358 lines
9.6 KiB
Go
package docker
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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"path"
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"strings"
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"testing"
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"time"
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"github.com/docker/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
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"github.com/docker/docker/builtins"
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"github.com/docker/docker/daemon"
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"github.com/docker/docker/engine"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/runconfig"
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"github.com/docker/docker/utils"
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)
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type Fataler interface {
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Fatal(...interface{})
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}
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// This file contains utility functions for docker's unit test suite.
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// It has to be named XXX_test.go, apparently, in other to access private functions
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// from other XXX_test.go functions.
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// Create a temporary daemon suitable for unit testing.
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// Call t.Fatal() at the first error.
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func mkDaemon(f Fataler) *daemon.Daemon {
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eng := newTestEngine(f, false, "")
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return mkDaemonFromEngine(eng, f)
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}
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func createNamedTestContainer(eng *engine.Engine, config *runconfig.Config, f Fataler, name string) (shortId string) {
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job := eng.Job("create", name)
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if err := job.ImportEnv(config); err != nil {
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f.Fatal(err)
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}
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var outputBuffer = bytes.NewBuffer(nil)
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job.Stdout.Add(outputBuffer)
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if err := job.Run(); err != nil {
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f.Fatal(err)
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}
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return engine.Tail(outputBuffer, 1)
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}
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func createTestContainer(eng *engine.Engine, config *runconfig.Config, f Fataler) (shortId string) {
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return createNamedTestContainer(eng, config, f, "")
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}
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func startContainer(eng *engine.Engine, id string, t Fataler) {
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job := eng.Job("start", id)
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if err := job.Run(); err != nil {
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t.Fatal(err)
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}
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}
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func containerRun(eng *engine.Engine, id string, t Fataler) {
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startContainer(eng, id, t)
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containerWait(eng, id, t)
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}
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func containerFileExists(eng *engine.Engine, id, dir string, t Fataler) bool {
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c := getContainer(eng, id, t)
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if err := c.Mount(); err != nil {
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t.Fatal(err)
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}
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defer c.Unmount()
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if _, err := os.Stat(path.Join(c.RootfsPath(), dir)); err != nil {
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if os.IsNotExist(err) {
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return false
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}
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t.Fatal(err)
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}
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return true
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}
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func containerAttach(eng *engine.Engine, id string, t Fataler) (io.WriteCloser, io.ReadCloser) {
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c := getContainer(eng, id, t)
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i, err := c.StdinPipe()
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if err != nil {
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t.Fatal(err)
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}
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o, err := c.StdoutPipe()
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if err != nil {
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t.Fatal(err)
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}
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return i, o
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}
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func containerWait(eng *engine.Engine, id string, t Fataler) int {
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ex, _ := getContainer(eng, id, t).WaitStop(-1 * time.Second)
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return ex
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}
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func containerWaitTimeout(eng *engine.Engine, id string, t Fataler) error {
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_, err := getContainer(eng, id, t).WaitStop(500 * time.Millisecond)
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return err
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}
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func containerKill(eng *engine.Engine, id string, t Fataler) {
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if err := eng.Job("kill", id).Run(); err != nil {
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t.Fatal(err)
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}
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}
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func containerRunning(eng *engine.Engine, id string, t Fataler) bool {
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return getContainer(eng, id, t).IsRunning()
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}
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func containerAssertExists(eng *engine.Engine, id string, t Fataler) {
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getContainer(eng, id, t)
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}
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func containerAssertNotExists(eng *engine.Engine, id string, t Fataler) {
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daemon := mkDaemonFromEngine(eng, t)
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if c := daemon.Get(id); c != nil {
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t.Fatal(fmt.Errorf("Container %s should not exist", id))
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}
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}
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// assertHttpNotError expect the given response to not have an error.
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// Otherwise the it causes the test to fail.
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func assertHttpNotError(r *httptest.ResponseRecorder, t Fataler) {
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// Non-error http status are [200, 400)
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if r.Code < http.StatusOK || r.Code >= http.StatusBadRequest {
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t.Fatal(fmt.Errorf("Unexpected http error: %v", r.Code))
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}
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}
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// assertHttpError expect the given response to have an error.
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// Otherwise the it causes the test to fail.
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func assertHttpError(r *httptest.ResponseRecorder, t Fataler) {
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// Non-error http status are [200, 400)
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if !(r.Code < http.StatusOK || r.Code >= http.StatusBadRequest) {
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t.Fatal(fmt.Errorf("Unexpected http success code: %v", r.Code))
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}
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}
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func getContainer(eng *engine.Engine, id string, t Fataler) *daemon.Container {
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daemon := mkDaemonFromEngine(eng, t)
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c := daemon.Get(id)
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if c == nil {
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t.Fatal(fmt.Errorf("No such container: %s", id))
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}
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return c
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}
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func mkDaemonFromEngine(eng *engine.Engine, t Fataler) *daemon.Daemon {
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iDaemon := eng.Hack_GetGlobalVar("httpapi.daemon")
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if iDaemon == nil {
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panic("Legacy daemon field not set in engine")
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}
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daemon, ok := iDaemon.(*daemon.Daemon)
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if !ok {
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panic("Legacy daemon field in engine does not cast to *daemon.Daemon")
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}
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return daemon
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}
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func newTestEngine(t Fataler, autorestart bool, root string) *engine.Engine {
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if root == "" {
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if dir, err := newTestDirectory(unitTestStoreBase); err != nil {
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t.Fatal(err)
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} else {
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root = dir
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}
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}
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os.MkdirAll(root, 0700)
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eng := engine.New()
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eng.Logging = false
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// Load default plugins
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builtins.Register(eng)
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// (This is manually copied and modified from main() until we have a more generic plugin system)
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cfg := &daemon.Config{
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Root: root,
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AutoRestart: autorestart,
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ExecDriver: "native",
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// Either InterContainerCommunication or EnableIptables must be set,
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// otherwise NewDaemon will fail because of conflicting settings.
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InterContainerCommunication: true,
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}
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d, err := daemon.NewDaemon(cfg, eng)
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if err != nil {
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t.Fatal(err)
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}
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if err := d.Install(eng); err != nil {
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t.Fatal(err)
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}
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return eng
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}
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func NewTestEngine(t Fataler) *engine.Engine {
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return newTestEngine(t, false, "")
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}
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func newTestDirectory(templateDir string) (dir string, err error) {
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return utils.TestDirectory(templateDir)
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}
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func getCallerName(depth int) string {
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return utils.GetCallerName(depth)
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}
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// Write `content` to the file at path `dst`, creating it if necessary,
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// as well as any missing directories.
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// The file is truncated if it already exists.
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// Call t.Fatal() at the first error.
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func writeFile(dst, content string, t *testing.T) {
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// Create subdirectories if necessary
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if err := os.MkdirAll(path.Dir(dst), 0700); err != nil && !os.IsExist(err) {
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t.Fatal(err)
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}
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f, err := os.OpenFile(dst, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0700)
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if err != nil {
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t.Fatal(err)
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}
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// Write content (truncate if it exists)
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if _, err := io.Copy(f, strings.NewReader(content)); err != nil {
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t.Fatal(err)
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}
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}
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// Return the contents of file at path `src`.
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// Call t.Fatal() at the first error (including if the file doesn't exist)
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func readFile(src string, t *testing.T) (content string) {
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f, err := os.Open(src)
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if err != nil {
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t.Fatal(err)
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}
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data, err := ioutil.ReadAll(f)
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if err != nil {
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t.Fatal(err)
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}
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return string(data)
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}
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// Create a test container from the given daemon `r` and run arguments `args`.
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// If the image name is "_", (eg. []string{"-i", "-t", "_", "bash"}, it is
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// dynamically replaced by the current test image.
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// The caller is responsible for destroying the container.
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// Call t.Fatal() at the first error.
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func mkContainer(r *daemon.Daemon, args []string, t *testing.T) (*daemon.Container, *runconfig.HostConfig, error) {
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config, hc, _, err := parseRun(args)
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defer func() {
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if err != nil && t != nil {
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t.Fatal(err)
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}
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}()
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if err != nil {
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return nil, nil, err
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}
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if config.Image == "_" {
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config.Image = GetTestImage(r).ID
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}
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c, _, err := r.Create(config, nil, "")
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if err != nil {
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return nil, nil, err
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}
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// NOTE: hostConfig is ignored.
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// If `args` specify privileged mode, custom lxc conf, external mount binds,
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// port redirects etc. they will be ignored.
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// This is because the correct way to set these things is to pass environment
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// to the `start` job.
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// FIXME: this helper function should be deprecated in favor of calling
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// `create` and `start` jobs directly.
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return c, hc, nil
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}
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// Create a test container, start it, wait for it to complete, destroy it,
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// and return its standard output as a string.
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// The image name (eg. the XXX in []string{"-i", "-t", "XXX", "bash"}, is dynamically replaced by the current test image.
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// If t is not nil, call t.Fatal() at the first error. Otherwise return errors normally.
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func runContainer(eng *engine.Engine, r *daemon.Daemon, args []string, t *testing.T) (output string, err error) {
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defer func() {
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if err != nil && t != nil {
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t.Fatal(err)
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}
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}()
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container, hc, err := mkContainer(r, args, t)
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if err != nil {
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return "", err
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}
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defer r.Destroy(container)
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stdout, err := container.StdoutPipe()
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if err != nil {
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return "", err
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}
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defer stdout.Close()
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job := eng.Job("start", container.ID)
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if err := job.ImportEnv(hc); err != nil {
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return "", err
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}
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if err := job.Run(); err != nil {
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return "", err
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}
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container.WaitStop(-1 * time.Second)
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data, err := ioutil.ReadAll(stdout)
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if err != nil {
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return "", err
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}
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output = string(data)
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return
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}
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// FIXME: this is duplicated from graph_test.go in the docker package.
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func fakeTar() (io.ReadCloser, error) {
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content := []byte("Hello world!\n")
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buf := new(bytes.Buffer)
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tw := tar.NewWriter(buf)
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for _, name := range []string{"/etc/postgres/postgres.conf", "/etc/passwd", "/var/log/postgres/postgres.conf"} {
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hdr := new(tar.Header)
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hdr.Size = int64(len(content))
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hdr.Name = name
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if err := tw.WriteHeader(hdr); err != nil {
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return nil, err
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}
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tw.Write([]byte(content))
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}
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tw.Close()
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return ioutil.NopCloser(buf), nil
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}
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func getAllImages(eng *engine.Engine, t *testing.T) *engine.Table {
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return getImages(eng, t, true, "")
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}
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func getImages(eng *engine.Engine, t *testing.T, all bool, filter string) *engine.Table {
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job := eng.Job("images")
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job.SetenvBool("all", all)
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job.Setenv("filter", filter)
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images, err := job.Stdout.AddListTable()
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if err != nil {
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t.Fatal(err)
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}
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if err := job.Run(); err != nil {
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t.Fatal(err)
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}
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return images
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}
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func parseRun(args []string) (*runconfig.Config, *runconfig.HostConfig, *flag.FlagSet, error) {
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cmd := flag.NewFlagSet("run", flag.ContinueOnError)
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cmd.SetOutput(ioutil.Discard)
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cmd.Usage = nil
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return runconfig.Parse(cmd, args)
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}
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