dotcloud/docker

package container

import (
    "context"
    "strings"
    "testing"

    "github.com/docker/docker/client"
    "gotest.tools/v3/assert"
    is "gotest.tools/v3/assert/cmp"
)

// GetContainerNS gets the value of the specified namespace of a container
func GetContainerNS(ctx context.Context, t *testing.T, apiClient client.APIClient, cID, nsName string) string {
    t.Helper()
    res, err := Exec(ctx, apiClient, cID, []string{"readlink", "/proc/self/ns/" + nsName})
    assert.NilError(t, err)
    assert.Assert(t, is.Len(res.Stderr(), 0))
    assert.Equal(t, 0, res.ExitCode)
    return strings.TrimSpace(res.Stdout())
}