moby--moby/integration-cli/docker_cli_inspect_test.go

package main

import (
	"fmt"
	"os/exec"
	"strconv"
	"strings"

	"github.com/go-check/check"
)

func (s *DockerSuite) TestInspectImage(c *check.C) {
	imageTest := "emptyfs"
	imageTestID := "511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158"
	id, err := inspectField(imageTest, "Id")
	c.Assert(err, check.IsNil)

	if id != imageTestID {
		c.Fatalf("Expected id: %s for image: %s but received id: %s", imageTestID, imageTest, id)
	}

}

func (s *DockerSuite) TestInspectInt64(c *check.C) {
	runCmd := exec.Command(dockerBinary, "run", "-d", "-m=300M", "busybox", "true")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	out = strings.TrimSpace(out)

	inspectOut, err := inspectField(out, "HostConfig.Memory")
	c.Assert(err, check.IsNil)

	if inspectOut != "314572800" {
		c.Fatalf("inspect got wrong value, got: %q, expected: 314572800", inspectOut)
	}
}

func (s *DockerSuite) TestInspectDefault(c *check.C) {

	//Both the container and image are named busybox. docker inspect will fetch the container JSON.
	//If the container JSON is not available, it will go for the image JSON.

	runCmd := exec.Command(dockerBinary, "run", "--name=busybox", "-d", "busybox", "true")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	inspectCmd := exec.Command(dockerBinary, "inspect", "busybox")

	_, exitCode, err := runCommandWithOutput(inspectCmd)
	if exitCode != 0 || err != nil {
		c.Fatalf("failed to inspect container: %s, %v", out, err)
	}
}

func (s *DockerSuite) TestInspectTypeFlagContainer(c *check.C) {

	//Both the container and image are named busybox. docker inspect will fetch container
	//JSON State.Running field. If the field is true, it's a container.

	runCmd := exec.Command(dockerBinary, "run", "--name=busybox", "-d", "busybox", "top")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	formatStr := fmt.Sprintf("--format='{{.State.Running}}'")
	inspectCmd := exec.Command(dockerBinary, "inspect", "--type=container", formatStr, "busybox")

	out, exitCode, err := runCommandWithOutput(inspectCmd)
	if exitCode != 0 || err != nil {
		c.Fatalf("failed to inspect container: %s, %v", out, err)
	}

	if out != "true\n" {
		c.Fatal("not a container JSON")
	}
}

func (s *DockerSuite) TestInspectTypeFlagWithNoContainer(c *check.C) {

	//Run this test on an image named busybox. docker inspect will try to fetch container
	//JSON. Since there is no container named busybox and --type=container, docker inspect will
	//not try to get the image JSON. It will throw an error.

	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "true")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	inspectCmd := exec.Command(dockerBinary, "inspect", "--type=container", "busybox")

	_, exitCode, err := runCommandWithOutput(inspectCmd)
	if exitCode == 0 || err == nil {
		c.Fatalf("docker inspect should have failed, as there is no container named busybox")
	}
}

func (s *DockerSuite) TestInspectTypeFlagWithImage(c *check.C) {

	//Both the container and image are named busybox. docker inspect will fetch image
	//JSON as --type=image. if there is no image with name busybox, docker inspect
	//will throw an error.

	runCmd := exec.Command(dockerBinary, "run", "--name=busybox", "-d", "busybox", "true")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	inspectCmd := exec.Command(dockerBinary, "inspect", "--type=image", "busybox")

	out, exitCode, err := runCommandWithOutput(inspectCmd)
	if exitCode != 0 || err != nil {
		c.Fatalf("failed to inspect image: %s, %v", out, err)
	}

	if strings.Contains(out, "State") {
		c.Fatal("not an image JSON")
	}

}

func (s *DockerSuite) TestInspectTypeFlagWithInvalidValue(c *check.C) {

	//Both the container and image are named busybox. docker inspect will fail
	//as --type=foobar is not a valid value for the flag.

	runCmd := exec.Command(dockerBinary, "run", "--name=busybox", "-d", "busybox", "true")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	inspectCmd := exec.Command(dockerBinary, "inspect", "--type=foobar", "busybox")

	out, exitCode, err := runCommandWithOutput(inspectCmd)
	if exitCode != 0 || err != nil {
		if !strings.Contains(out, "not a valid value for --type") {
			c.Fatalf("failed to inspect image: %s, %v", out, err)
		}
	}
}

func (s *DockerSuite) TestInspectImageFilterInt(c *check.C) {
	imageTest := "emptyfs"
	out, err := inspectField(imageTest, "Size")
	c.Assert(err, check.IsNil)

	size, err := strconv.Atoi(out)
	if err != nil {
		c.Fatalf("failed to inspect size of the image: %s, %v", out, err)
	}

	//now see if the size turns out to be the same
	formatStr := fmt.Sprintf("--format='{{eq .Size %d}}'", size)
	imagesCmd := exec.Command(dockerBinary, "inspect", formatStr, imageTest)
	out, exitCode, err := runCommandWithOutput(imagesCmd)
	if exitCode != 0 || err != nil {
		c.Fatalf("failed to inspect image: %s, %v", out, err)
	}
	if result, err := strconv.ParseBool(strings.TrimSuffix(out, "\n")); err != nil || !result {
		c.Fatalf("Expected size: %d for image: %s but received size: %s", size, imageTest, strings.TrimSuffix(out, "\n"))
	}
}

func (s *DockerSuite) TestInspectContainerFilterInt(c *check.C) {
	runCmd := exec.Command(dockerBinary, "run", "-i", "-a", "stdin", "busybox", "cat")
	runCmd.Stdin = strings.NewReader("blahblah")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	id := strings.TrimSpace(out)

	out, err = inspectField(id, "State.ExitCode")
	c.Assert(err, check.IsNil)

	exitCode, err := strconv.Atoi(out)
	if err != nil {
		c.Fatalf("failed to inspect exitcode of the container: %s, %v", out, err)
	}

	//now get the exit code to verify
	formatStr := fmt.Sprintf("--format='{{eq .State.ExitCode %d}}'", exitCode)
	runCmd = exec.Command(dockerBinary, "inspect", formatStr, id)
	out, _, err = runCommandWithOutput(runCmd)
	if err != nil {
		c.Fatalf("failed to inspect container: %s, %v", out, err)
	}
	if result, err := strconv.ParseBool(strings.TrimSuffix(out, "\n")); err != nil || !result {
		c.Fatalf("Expected exitcode: %d for container: %s", exitCode, id)
	}
}

func (s *DockerSuite) TestInspectImageGraphDriver(c *check.C) {
	imageTest := "emptyfs"
	name, err := inspectField(imageTest, "GraphDriver.Name")
	c.Assert(err, check.IsNil)

	if name != "devicemapper" && name != "overlay" && name != "vfs" && name != "zfs" && name != "btrfs" && name != "aufs" {
		c.Fatalf("%v is not a valid graph driver name", name)
	}

	if name != "devicemapper" {
		return
	}

	deviceId, err := inspectField(imageTest, "GraphDriver.Data.DeviceId")
	c.Assert(err, check.IsNil)

	_, err = strconv.Atoi(deviceId)
	if err != nil {
		c.Fatalf("failed to inspect DeviceId of the image: %s, %v", deviceId, err)
	}

	deviceSize, err := inspectField(imageTest, "GraphDriver.Data.DeviceSize")
	c.Assert(err, check.IsNil)

	_, err = strconv.ParseUint(deviceSize, 10, 64)
	if err != nil {
		c.Fatalf("failed to inspect DeviceSize of the image: %s, %v", deviceSize, err)
	}
}

func (s *DockerSuite) TestInspectContainerGraphDriver(c *check.C) {
	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "true")
	out, _, _, err := runCommandWithStdoutStderr(runCmd)
	if err != nil {
		c.Fatalf("failed to run container: %v, output: %q", err, out)
	}

	out = strings.TrimSpace(out)

	name, err := inspectField(out, "GraphDriver.Name")
	c.Assert(err, check.IsNil)

	if name != "devicemapper" && name != "overlay" && name != "vfs" && name != "zfs" && name != "btrfs" && name != "aufs" {
		c.Fatalf("%v is not a valid graph driver name", name)
	}

	if name != "devicemapper" {
		return
	}

	deviceId, err := inspectField(out, "GraphDriver.Data.DeviceId")
	c.Assert(err, check.IsNil)

	_, err = strconv.Atoi(deviceId)
	if err != nil {
		c.Fatalf("failed to inspect DeviceId of the image: %s, %v", deviceId, err)
	}

	deviceSize, err := inspectField(out, "GraphDriver.Data.DeviceSize")
	c.Assert(err, check.IsNil)

	_, err = strconv.ParseUint(deviceSize, 10, 64)
	if err != nil {
		c.Fatalf("failed to inspect DeviceSize of the image: %s, %v", deviceSize, err)
	}
}