initializationError(com.example.demo.DemoApplicationTests) Time elapsed: 0.002 sec <<< ERROR! java.lang.IllegalStateException: Unable to find a @SpringBootConfiguration, you need to use @ContextConfiguration or @SpringBootTest(classes=...) with your test at org.springframework.util.Assert.state(Assert.java:70)
由于包名不一致造成的，删除example包，或改成对应的报名即可