github.com/uriddle/docker@v0.0.0-20210926094723-4072e6aeb013/integration-cli/docker_cli_save_load_unix_test.go (about)

     1  // +build !windows
     2  
     3  package main
     4  
     5  import (
     6  	"io/ioutil"
     7  	"os"
     8  	"os/exec"
     9  
    10  	"github.com/docker/docker/pkg/integration/checker"
    11  	"github.com/go-check/check"
    12  	"github.com/kr/pty"
    13  )
    14  
    15  // save a repo and try to load it using stdout
    16  func (s *DockerSuite) TestSaveAndLoadRepoStdout(c *check.C) {
    17  	name := "test-save-and-load-repo-stdout"
    18  	dockerCmd(c, "run", "--name", name, "busybox", "true")
    19  
    20  	repoName := "foobar-save-load-test"
    21  	before, _ := dockerCmd(c, "commit", name, repoName)
    22  
    23  	tmpFile, err := ioutil.TempFile("", "foobar-save-load-test.tar")
    24  	c.Assert(err, check.IsNil)
    25  	defer os.Remove(tmpFile.Name())
    26  
    27  	saveCmd := exec.Command(dockerBinary, "save", repoName)
    28  	saveCmd.Stdout = tmpFile
    29  
    30  	_, err = runCommand(saveCmd)
    31  	c.Assert(err, check.IsNil)
    32  
    33  	tmpFile, err = os.Open(tmpFile.Name())
    34  	c.Assert(err, check.IsNil)
    35  
    36  	deleteImages(repoName)
    37  
    38  	loadCmd := exec.Command(dockerBinary, "load")
    39  	loadCmd.Stdin = tmpFile
    40  
    41  	out, _, err := runCommandWithOutput(loadCmd)
    42  	c.Assert(err, check.IsNil, check.Commentf(out))
    43  
    44  	after, _ := dockerCmd(c, "inspect", "-f", "{{.Id}}", repoName)
    45  
    46  	c.Assert(before, check.Equals, after) //inspect is not the same after a save / load
    47  
    48  	deleteImages(repoName)
    49  
    50  	pty, tty, err := pty.Open()
    51  	c.Assert(err, check.IsNil)
    52  	cmd := exec.Command(dockerBinary, "save", repoName)
    53  	cmd.Stdin = tty
    54  	cmd.Stdout = tty
    55  	cmd.Stderr = tty
    56  	c.Assert(cmd.Start(), check.IsNil)
    57  	c.Assert(cmd.Wait(), check.NotNil) //did not break writing to a TTY
    58  
    59  	buf := make([]byte, 1024)
    60  
    61  	n, err := pty.Read(buf)
    62  	c.Assert(err, check.IsNil) //could not read tty output
    63  	c.Assert(string(buf[:n]), checker.Contains, "Cowardly refusing", check.Commentf("help output is not being yielded", out))
    64  }