java - 如何通过 JUNIT 将数据与文件进行比较？

Question

应该执行的测试:

@Test
public void Should_Create_List_Of_Racers_And_Put_It_To_Map() throws IOException {

    RacerListPrinter racerListPrinter = new RacerListPrinter();
    Should_Create_List_Of_Racers();
    assertEquals(racerListPrinter.printRacerList(Should_Create_List_Of_Racers()),      );
}

哪里Should_Create_List_Of_Racers(); :

@Test
public List<Racer> Should_Create_List_Of_Racers() throws IOException {

    List<Racer> listOfRacers = new ArrayList<>();
    SortedListOfRacers racerList = new SortedListOfRacers();
    Racer racer1 = new Racer("SVF", "Sebastian Vettel", "FERRARI");
    racer1.setResult("1:04.415");
    listOfRacers.add(racer1);

    Racer racer2 = new Racer("DRR", "Daniel Ricciardo", "RED BULL RACING TAG HEUER");
    racer2.setResult("1:12.013");
    listOfRacers.add(racer2);

    Racer racer3 = new Racer("VBM", "Valtteri Bottas", "MERCEDES");
    racer3.setResult("1:12.434");
    listOfRacers.add(racer3); 

我的文件位于资源中，名为 finalResultForTesting.txt我需要比较数据方法

Should_Create_List_Of_Racers()

以及此行中的文件:

assertEquals(racerListPrinter.printRacerList(Should_Create_List_Of_Racers()));

racerListPrinter.printRacerList(List<Racer>)的输出格式:

1. Sebastian Vettel  | FERRARI                   | 1:04.415
2. Daniel Ricciardo  | RED BULL RACING TAG HEUER | 1:12.013
3. Valtteri Bottas   | MERCEDES                  | 1:12.434

Answer 1

这是 java8 上的工作解决方案。我期待RacerListPrinter返回List<String> 。请注意，我重命名了您的方法以遵循标准驼峰命名约定。

@Test
public void shouldPrintRacerListInCorrectFormat() throws Exception {
    RacerListPrinter racerListPrinter = new RacerListPrinter();

    // yours Should_Create_List_Of_Racers()
    List<Racer> actualRacers = populateRacerList();

    List<String> actualRacersOutput = racerListPrinter.printRacerList(actualRacers);

    List<String> expectedRacersOutput = loadRacerListFromFile("finalResultForTesting.txt");

    assertEquals(expectedRacersOutput, actualRacersOutput);
}

private List<String> loadRacerListFromFile(String fileName) throws URISyntaxException, IOException {
    Path path = Paths.get(getClass().getClassLoader()
                     .getResource(fileName).toURI());

    // use try-with-resources in order to ensure stream is closed
    try (Stream<String> lines = Files.lines(path)) {
        return lines.collect(Collectors.toList());
    }
}