Eclipse一直说“在测试运行器JUnit 5中未找到测试". [英] Eclipse keep saying "No tests found with test runner JUnit 5"

问题描述

我正在使用Eclipse Oxygen.3版本(4.7.3).以下是我的JUnit测试类:

I am using Eclipse Oxygen.3 Release (4.7.3). The following is my JUnit test class:

import static org.junit.Assert.assertEquals;

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

class MyMathTest {
    MyMath myMath = new MyMath();

    @Before
    public void before() {
        System.out.println("Before");
    }

    @After
    public void after() {
        System.out.println("After");
    }

    @Test
    public void testSum_with3numbers() {
        System.out.println("Test1");
        int result = myMath.sum(new int[] {1,2,3});
        int expected = 6;
        assertEquals(expected, result);
    }

    @Test
    public void testSum_with1numbers() {
        System.out.println("Test2");
        int result = myMath.sum(new int[] {3});
        int expected = 3;
        assertEquals(expected, result);
    }

    @BeforeClass
    public static void beforeClass() {
        System.out.println("Before class");
    }

    @AfterClass
    public static void afterClass() {
        System.out.println("After class");
    }

}

当我运行此Junit测试时，eclipse会不断弹出对话框，告诉未找到测试运行器'JUnit 5'进行的测试" .为什么?

When I run this Junit test, eclipse keeps popping up dialog telling "No tests found with test runner 'JUnit 5'". Why?

推荐答案

您的测试类当前基于JUnit 4，因为它使用了org.junit包中的注释.

Your test class is currently based on JUnit 4 since it uses annotations from the org.junit package.

因此，要使其在Eclipse中作为JUnit 4测试类运行，您需要在运行配置"中选择JUnit 4 Runner.单击绿色圆圈旁边的小箭头(指向下方)，其中带有白色箭头(在Eclipse IDE的顶部).在此应该可以看到测试类，并选择可以在JUnit 4和JUnit 5运行器之间切换.

Thus, to get it to run as a JUnit 4 test class in Eclipse, you need to select the JUnit 4 Runner in the "Run Configuration". Click on the tiny arrow (pointing down) next to the green circle with a white arrow in it (at the top of the Eclipse IDE). There you should see your test class, and by selecting that you can switch between the JUnit 4 and JUnit 5 runners.

另一方面，如果您的目标是使用JUnit Jupiter(即JUnit 5的编程模型)编写测试，则需要从org.junit中的注释切换为org.junit.jupiter.api.

On the other hand, if your goal is to write a test using JUnit Jupiter (i.e., the programming model for JUnit 5), you'll need to switch from annotations in org.junit to org.junit.jupiter.api.

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