DockerCLI/e2e/container/attach_test.go

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package container
import (
"fmt"
"strings"
"testing"
"github.com/docker/cli/e2e/internal/fixtures"
"gotest.tools/v3/icmd"
)
func TestAttachExitCode(t *testing.T) {
const exitCode = 21
result := icmd.RunCommand("docker", "run", "-d", "-i", "--rm", fixtures.AlpineImage, "sh", "-c", fmt.Sprintf("read; exit %d", exitCode))
result.Assert(t, icmd.Success)
containerID := strings.TrimSpace(result.Stdout())
result = icmd.RunCmd(icmd.Command("docker", "attach", containerID), withStdinNewline)
result.Assert(t, icmd.Expected{ExitCode: exitCode})
}
func withStdinNewline(cmd *icmd.Cmd) {
cmd.Stdin = strings.NewReader("\n")
}