@@ -230,6 +230,17 @@ func TestEmptyTar(t *testing.T) {

 	if resultSum != expectedSum {

 		t.Fatalf("expected [%s] but got [%s]", expectedSum, resultSum)

 	}

+

+	// Test without ever actually writing anything.

+	if ts, err = NewTarSum(bytes.NewReader([]byte{}), true, Version0); err != nil {

+		t.Fatal(err)

+	}

+

+	resultSum = ts.Sum(nil)

+

+	if resultSum != expectedSum {

+		t.Fatalf("expected [%s] but got [%s]", expectedSum, resultSum)

+	}

 }

 var (