为什么@BeforeClass没有开火？

Question

这是一个取自现有代码库的cucumber场景大纲，但我被要求使用TestNG尝试它。一些东西（场景（），场景（），TestNGCucumberRunner，数据提供商）已经从stackoverflow上的另一个帖子中删除，因为我不知道如何使用TestNG使场景大纲发挥良好。

public class StepsSettings {
    private WebDriver driver;
    private SettingsPage settingsPage;
    private SearchBlock searchBlock;
    private TestNGCucumberRunner testNGCucumberRunner;

    @Test
    @Given("maximum results per page is set to {int}")
    public void maximumResultsPerPageIsSetTo(int results) {
        settingsPage = new SettingsPage(driver);
        searchBlock = new SearchBlock(driver);
        settingsPage.navigateTo();
        settingsPage.setNumberOfResults(results);
    }

    @Test
    @When("the user searches for {string} in collection {string}")
    public void theUserSearchesForInCollection(String key, String collection) {
        searchBlock.performSearch(key, collection);
    }

    @Test
    @Then("the number of publications displayed is no more than {int}")
    public theNumberOfPublicationsDisplayedIsNoMoreThan(int count) {
        By articlesBy = By.cssSelector("article");

        Assert.assertTrue(settingsPage.getObjects(articlesBy).size() <= count);
    }

    @Test(groups = "cucumber scenarios", description = "Runs Cucumber Scenarios", dataProvider = "scenarios")
    public void scenario(PickleWrapper pickleEvent, FeatureWrapper cucumberFeature) throws Throwable {
        testNGCucumberRunner.runScenario(pickleEvent.getPickle());
    }

    @DataProvider
    public Object[][] scenarios() {
        testNGCucumberRunner = new TestNGCucumberRunner(this.getClass());
        return testNGCucumberRunner.provideScenarios();
    }

    @BeforeClass(alwaysRun = true)
    public void setup() {
        System.setProperty(
            "webdriver.chrome.driver",
            System.getProperty("user.dir") + "\\webdriver\\chromedriver.exe"
        );
        driver = new ChromeDriver();
    }

    @AfterClass(alwaysRun = true)
    public void teardown() {
        driver.quit();
        testNGCucumberRunner.finish();
    }
}

在执行时，唯一的错误是NullPointerException，因为WebDriver获取其值时@BeforeClass未触发。

处理场景大纲的部分我不完全理解，但至少我不再得到带错误的不能注入@test注释方法。

Answer 1

请使用@BeforeTest而不是@BeforeClass。如果问题解决了，请尝试理解这里的测试注释流程。或者在这里发表评论，寻求进一步帮助。

Answer 2

用Before/AfterClass注释的方法必须是静态的。