Merge pull request #21959 from coolljt0725/fix_21957

Fix docker load progressbar, fixes #21957
Upstream-commit: 348d90276802aac6c76126f2fe6866c521190ecd
Component: engine

components/engine/integration-cli/docker_cli_save_load_unix_test.go

@@ -3,6 +3,7 @@
 package main
 
 import (
+	"fmt"
 	"io/ioutil"
 	"os"
 	"os/exec"
@@ -65,3 +66,22 @@ func (s *DockerSuite) TestSaveAndLoadRepoStdout(c *check.C) {
 	c.Assert(err, check.IsNil) //could not read tty output
 	c.Assert(string(buf[:n]), checker.Contains, "Cowardly refusing", check.Commentf("help output is not being yielded", out))
 }
+
+func (s *DockerSuite) TestSaveAndLoadWithProgressBar(c *check.C) {
+	name := "test-load"
+	_, err := buildImage(name, `
+	FROM busybox
+	RUN touch aa
+	`, true)
+	c.Assert(err, check.IsNil)
+
+	tmptar := name + ".tar"
+	dockerCmd(c, "save", "-o", tmptar, name)
+	defer os.Remove(tmptar)
+
+	dockerCmd(c, "rmi", name)
+	dockerCmd(c, "tag", "busybox", name)
+	out, _ := dockerCmd(c, "load", "-i", tmptar)
+	expected := fmt.Sprintf("The image %s:latest already exists, renaming the old one with ID", name)
+	c.Assert(out, checker.Contains, expected)
+}