Unable to find a @SpringBootConfiguration

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)

　　因为包名不一致形成的，删除example包，或改为对应的报名便可