Implementation method of Junit using Groboutils Core for concurrent testing (detailed steps)

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junit cannot perform concurrent testing, but what should I do if there are scenarios that require concurrent testing? At this time, you can use a plug-in (Groboutils Core) to complete this function.
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Implementation

The first step: Add dependencies to the pom.xml of the project

<!-- https://mvnrepository.com/artifact/net.sourceforge.groboutils/groboutils-core -->
<dependency>
  <groupid>net.sourceforge.groboutils</groupid>
  <artifactid>groboutils-core</artifactid>
  <version>5</version>
  <scope>test</scope>
</dependency>

Step 2: Write code in single test

@Test
  public void testConcurrentInitOrBind() {

    // mock一个返回
    doReturn(Lists.newArrayList(userMemberCard)).when(operateCardDao)
        .queryCardByRegisterMobileAndTenantId(anyString(), anyLong());

    TestRunnable runner = new TestRunnable() {
      // 在runTest方法中填写自己的测试方法
      @Override
      public void runTest() throws Throwable {
        InitCardResVo resVoFirst = operateCardService.initOrBindCard(requestVo);
        System.out.println("result resVoFirst is:" + resVoFirst.toString());
      }
    };

    // 一个数组，代表并发个数。此处并发5个
    TestRunnable[] trs = new TestRunnable[5];
    for (int i = 0; i 

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