Use local "ensureRemoveAll" instead of docker/pkg/system

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

pkg/server/helpers_unix_test.go

@@ -19,9 +19,15 @@ limitations under the License.
 package server
 
 import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
+	"golang.org/x/net/context"
+	"golang.org/x/sys/unix"
 )
 
 func TestGetCgroupsPath(t *testing.T) {
@@ -56,3 +62,47 @@ func TestGetCgroupsPath(t *testing.T) {
 		assert.Equal(t, test.expected, got)
 	}
 }
+
+func TestEnsureRemoveAllWithMount(t *testing.T) {
+	if os.Getuid() != 0 {
+		t.Skip("skipping test that requires root")
+	}
+
+	dir1, err := ioutil.TempDir("", "test-ensure-removeall-with-dir1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	dir2, err := ioutil.TempDir("", "test-ensure-removeall-with-dir2")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir2)
+
+	bindDir := filepath.Join(dir1, "bind")
+	if err := os.MkdirAll(bindDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := unix.Mount(dir2, bindDir, "none", unix.MS_BIND, ""); err != nil {
+		t.Fatal(err)
+	}
+
+	done := make(chan struct{})
+	go func() {
+		err = ensureRemoveAll(context.Background(), dir1)
+		close(done)
+	}()
+
+	select {
+	case <-done:
+		if err != nil {
+			t.Fatal(err)
+		}
+	case <-time.After(5 * time.Second):
+		t.Fatal("timeout waiting for EnsureRemoveAll to finish")
+	}
+
+	if _, err := os.Stat(dir1); !os.IsNotExist(err) {
+		t.Fatalf("expected %q to not exist", dir1)
+	}
+}