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为什么新的线程在事务Spring JUnit测试中看不到主线程准备的测试数据?

我用Spring-boot-test写了一个Junit测试,在一个测试方法中,我首先准备了一些应该保存到MySQL DB的测试数据,然后我调用了目标方法,应该在100个子线程中进行测试来测试目标方法是否在并发中运行良好.此测试方法如下所示:

public class SysCodeRuleServiceImplTest extends BaseServiceTest {

    @Autowired
    private SysCodeRuleService sysCodeRuleService;

    @Autowired
    private SysCodeRuleDtlService sysCodeRuleDtlService;

    private final String codeRuleNo = "sdkfjks443";

        @Test
    public void testCreateSheetIdWithoutUniformedSerial_2() throws InterruptedException {
                //------ prepare test data start-----------
        SysCodeRule sysCodeRule = new SysCodeRule();
        sysCodeRule.setCodeRuleNo(codeRuleNo);
        sysCodeRule.setIfDateCode(1);
        sysCodeRule.setPadChar("0");
        sysCodeRule.setSerialDigits(6);
        sysCodeRule.setResetMode(1);
        sysCodeRule.setIfUniteSerial(0);
        sysCodeRule.setIfCache(0);
        sysCodeRule.setConstValue("PETREL");
        sysCodeRule.setStatus(1);
        sysCodeRule.setName(codeRuleNo);
        sysCodeRule.setCurSerialNo("0");
        sysCodeRule.setCurSerialDate(new Date());
        sysCodeRule.setCreateTime(new Date());
        sysCodeRule.setCreator("??");
        sysCodeRule.setDateCutBeginPosition(3);
        sysCodeRule.setDateCutEndPosition(8);
        boolean insertSysCodeRuleSucc = sysCodeRuleService.insert(sysCodeRule);
        assertThat(TestMessageConstants.PREPARE_TEST_DATA_FAILED, insertSysCodeRuleSucc);
        assertThat("", sysCodeRule.getId(), notNullValue());

        SysCodeRuleDtl sysCodeRuleDtl1 = new SysCodeRuleDtl();
        sysCodeRuleDtl1.setSysCodeId(sysCodeRule.getId() + "");
        sysCodeRuleDtl1.setOrderNo(1);
        sysCodeRuleDtl1.setFieldValue("locno");
        sysCodeRuleDtl1.setCutEndPosition(0);
        sysCodeRuleDtl1.setCutBeginPosition(0);
        sysCodeRuleDtl1.setCreateTime(new Date()); …
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java junit spring spring-test spring-boot

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