blocks|key|442245|text|您运行的版本取决于正在运行的应用程序的类路径。在同一台机器上有多个版本是可能的，但是如果这有问题，你可以为它写一个测试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|442246|import+junit.runner.Version;

class+SomeTests+{

++++void+testJUnitVersion()+{
++++++++assertEquals("4.8.2",+Version.id());
++++}
}|code-block|syntax|javascript|442247|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The version that you are running depends on the classpath of the running application. It's possible to have multiple versions on the same machine, but if this is in question you can just write a test for it:

<pre><code>import junit.runner.Version;

class SomeTests {

 void testJUnitVersion() {
 assertEquals("4.8.2", Version.id());
 }
}
</code></pre>

blocks|key|656787|text|这将打印jUnit的版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|656788|java+-cp+<path-to-junit-folder>/junit.jar+junit.runner.Version|code-block|syntax|javascript|656789|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This will print the version of jUnit.

<pre><code>java -cp &lt;path-to-junit-folder&gt;/junit.jar junit.runner.Version
</code></pre>

blocks|key|442315|text|在netbeans的“项目”窗口中，展开其中包含测试的项目的测试库文件夹。它将在jar文件的名称中显示版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|442316|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In netbeans in the projects window, expand the test libraries folder of a project that has a test in it. It will say the version in the name of the jar file.

blocks|key|442409|text|当您运行测试时，Eclipse会在JUnit视图上显示其运行器版本|type|unstyled|depth|inlineStyleRanges|entityRanges|data|442410|​|442411|📷|atomic|offset|length|442412|442413|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/aa6c3e76a52aa47fab17dda0a5bba26f.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

Eclipse shows its runner version on JUnit view when you run your tests

<a href="https://i.stack.imgur.com/aYJBS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aYJBS.png" alt="Junit View"></a>

blocks|key|656963|text|使用JUnit+5，您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|656964|import+java.util.ServiceLoader;
import+org.junit.platform.engine.TestEngine;
import+java.util.Iterator;|code-block|syntax|javascript|656965|final+ServiceLoader<TestEngine>+loader+=+ServiceLoader.load(TestEngine.class);
final+Iterator<TestEngine>+iterator+=+loader.iterator();
final+TestEngine+testEngine+=+iterator.next();
final+String+version+=+testEngine.getVersion().get();|656966|升级过程取决于您的项目结构。如果是Maven项目，您可以在pom.xml中设置版本。如果仍然不清楚，我建议为您的特定构建环境创建另一个问题。|offset|length|style|CODE|656967|entityMap^0|0|0|0|T|7|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

With JUnit 5 you can do something like this:

<pre class="lang-java prettyprint-override"><code>import java.util.ServiceLoader;
import org.junit.platform.engine.TestEngine;
import java.util.Iterator;
</code></pre>
 
<pre class="lang-java prettyprint-override"><code>final ServiceLoader&lt;TestEngine&gt; loader = ServiceLoader.load(TestEngine.class);
final Iterator&lt;TestEngine&gt; iterator = loader.iterator();
final TestEngine testEngine = iterator.next();
final String version = testEngine.getVersion().get();
</code></pre>
Upgrade process depends on your project structure. If it’s a Maven project, you can set the version in your <code>pom.xml</code>. If it’s still unclear I recommend creating another question for your specific build environment.

How to know which version of JUnit do I have installed on my PC?

Second question- How do I upgrade it?

How to get JUnit version

Eclipse

如何知道我的PC上安装了哪个版本的JUnit？第二个问题-如何升级它？

问如何获取JUnit版本
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