@Test
public void acceptance() throws IOException {

    URL footballFile = getResource("football.dat");
    FootballFileLineProcessor footballFileLineProcessor = new FootballFileLineProcessor();
    FootballFileReader footballFileReader = new FootballFileReader(footballFile, footballFileLineProcessor);
    SmallestGoalDifference smallestGoalDifference = new SmallestGoalDifference(footballFileReader);
    Optional<String> teamWithMinimumGoalDifference = smallestGoalDifference.teamWithMinimumGoalDifference();
    assertThat(teamWithMinimumGoalDifference).hasValue("Aston_Villa");
}