spring-boot使用MockMvc单元测试启动报错

Caused by: java.io.FileNotFoundException: Could not open ServletContext resource [/config.properties]
	at org.springframework.web.context.support.ServletContextResource.getInputStream(ServletContextResource.java:141)
	at org.springframework.core.io.support.EncodedResource.getInputStream(EncodedResource.java:154)
	at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:98)
	at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:72)
	at org.springframework.core.io.support.PropertiesLoaderUtils.loadProperties(PropertiesLoaderUtils.java:58)
	at org.springframework.core.io.support.ResourcePropertySource.<init>(ResourcePropertySource.java:65)
	at org.springframework.core.io.support.DefaultPropertySourceFactory.createPropertySource(DefaultPropertySourceFactory.java:36)
	at org.springframework.context.annotation.ConfigurationClassParser.processPropertySource(ConfigurationClassParser.java:445)
	at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:273)
	at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:247)
	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:192)
	at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:297)
	at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:247)
	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:200)
	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:169)

解决方法
@SpringBootTest 注解增加端口配置webEnvironment

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class BaseTest {
	@Autowired
	protected WebApplicationContext webApplicationContext;

	protected MockMvc mockMvc;

	@Before
	public void setUp() {
		mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
	}
}