public DataTableDiff calculateDiffs() {
        Map<Integer, Delta> deltasByLine = createDeltasByLine();
        return createTableDiff(deltasByLine);
    }
@Test
    void should_not_fail_with_out_of_memory() {
        DataTable expected = TableParser.parse("" +
                "| I'm going to work |\n");
        List<List<String>> actual = new ArrayList<>();
        actual.add(singletonList("I just woke up"));
        actual.add(singletonList("I'm going to work"));

        new TableDiffer(expected, DataTable.create(actual)).calculateDiffs();
    }