Junit实现执行条件,以编程方式禁用测试功能

Question

我正在尝试构建一个与JUnit测试类一起使用的自定义注释.目标是定期运行测试.

要运行的示例类TempTest.java:

  @Periodic(period = 2)
  public class TempTest {
    @Test
    @ExtendWith(PeriodicEnabling.class)
    public void testTrue() {
        assertTrue(true);
    }

    @Test
    @ExtendWith(PeriodicEnabling.class)
    public void testZero() {
        int val = 0; assertEquals(0, val);
    }

    @Test
    @ExtendWith(PeriodicEnabling.class)
    public void testZero2() {
        assertEquals(0, "".length());
    }

    @Test
    @ExtendWith(PeriodicEnabling.class)
    public void testFalse() {
        assertTrue(!false);
    }
 }

因此,period = 2我们希望只运行其他(或每第二次)测试.自定义注释如下所示:

@Retention(RetentionPolicy.RUNTIME)
@ExtendWith(PeriodicEnabling.class)
@Target(ElementType.TYPE)
public @interface Periodic {
    int period() default 1;
}

最后PeriodicEnabling帮手类:

public class PeriodicEnabling implements ExecutionCondition {
    private int period, currCount;

    private static final ConditionEvaluationResult ENABLED = ConditionEvaluationResult.enabled("Count looks good!");
    private static final ConditionEvaluationResult DISABLED = ConditionEvaluationResult.disabled("Disabled due to periodic disabling!");

    public PeriodicEnabling() {
        System.out.println("Constructor!!");

        Class<TempTest> cls = TempTest.class;

        if(cls.isAnnotationPresent(Periodic.class)) {
            Annotation annotation = cls.getAnnotation(Periodic.class);
            this.period = ((Periodic) annotation).period();
        } else {
            this.period = 1;
        }

        currCount = 0;
    }

    @Override
    public ConditionEvaluationResult evaluateExecutionCondition(ExtensionContext extensionContext) {
        System.out.println("before::currCount = " + currCount);

        currCount++;

        int result = this.currCount % this.period;

        if (result == 0) {
            System.out.println("after::enabled::currCount = " + currCount);
            return ENABLED;
        }

        System.out.println("after::disabled::currCount = " + currCount + ", result=" + result);
        return DISABLED;
    }

}

---

问题:

问题是在第一个测试函数evaluateExecutionCondition返回后EvaluationCondition.Disabled,其余的evaluateExecutionCondition函数不再为它们执行函数.其余的测试用例根本不运行.

这是我在运行示例测试文件时看到的输出:

Constructor!! 

before::currCount = 0
after::disabled::currCount = 1, result=1

Disabled due to periodic disabling!

Disabled due to periodic disabling!

Disabled due to periodic disabling!

Disabled due to periodic disabling!

---

我看到了一些解决方案,其中解决方案是使用assumeThat具有一些动态条件的函数.但是我需要一些不同的东西,我需要一个自定义的注释类来处理带注释的类中每个测试函数的执行.

任何帮助表示赞赏:)!

Answer 1

您正在将扩展应用于类,因此它不仅对单个方法有效,而且对类本身也有效.木星然后尽职尽责地evaluateExecutionCondition确定该类是否被禁用.由于它是,所以在没有进一步调用的情况下也禁用各个方法.

您的代码中还有一些其他改进(例如,您不应该在扩展中包含字段) - 我建议阅读JUnit 5扩展模型的读取(链接到我博客上的帖子).