spring boot:java.lang.IllegalStateException异常

1、单元测试报错：

java.lang.IllegalStateException: Could not load TestContextBootstrapper [null]. Specify @BootstrapWith's 'value' attribute or make the default bootstrapper class available.

    at org.springframework.test.context.BootstrapUtils.resolveTestContextBootstrapper(BootstrapUtils.java:145)
    at org.springframework.test.context.TestContextManager.(TestContextManager.java:120)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTestContextManager(SpringJUnit4ClassRunner.java:151)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.(SpringJUnit4ClassRunner.java:142)
    at org.springframework.test.context.junit4.SpringRunner.(SpringRunner.java:49)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
 

2、错误原因：

     
		org.springframework.boot
		spring-boot-starter-parent
		1.5.1.RELEASE
		
	

	
		org.springframework
		spring-test
		5.0.4.RELEASE
	

3、依赖版本冲突，最简单的方式是将test版本号去掉，会自动匹配，如下：

    
		org.springframework.boot
		spring-boot-starter-parent
		1.5.1.RELEASE
		
	

	
		org.springframework
		spring-test