根据Spring Boot integration tests doesn't read properties files的建议,我创建了以下代码,目的是从JUnit测试中的属性中读取地图。 (我正在使用yml格式,并使用@ConfigurationProperties而不是@Value)
@RunWith(SpringJUnit4ClassRunner.class)
@TestPropertySource(locations="classpath:application-test.yml")
@ContextConfiguration(classes = {PropertiesTest.ConfigurationClass.class, PropertiesTest.ClassToTest.class})
public class PropertiesTest {
@Configuration
@EnableConfigurationProperties
static class ConfigurationClass {
}
@ConfigurationProperties
static class ClassToTest {
private String test;
private Map<String, Object> myMap = new HashMap<>();
public String getTest() {
return test;
}
public void setTest(String test) {
this.test = test;
}
public Map<String, Object> getMyMap() {
return myMap;
}
}
@Autowired
private ClassToTest config;
@Test
public void testStringConfig() {
Assert.assertEquals(config.test, "works!");
}
@Test
public void testMapConfig() {
Assert.assertEquals(config.myMap.size(), 1);
}
}
我的测试配置(在application-test.yml中):
test: works!
myMap:
aKey: aVal
aKey2: aVal2
奇怪的是,字符串“有效!”已成功从配置文件中读取,但未填充地图。
我错过了什么?
注意:添加地图设定器会导致以下异常:
Caused by: org.springframework.validation.BindException: org.springframework.boot.bind.RelaxedDataBinder$RelaxedBeanPropertyBindingResult: 1 errors
Field error in object 'target' on field 'myMap': rejected value []; codes [typeMismatch.target.myMap,typeMismatch.myMap,typeMismatch.java.util.Map,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [target.myMap,myMap]; arguments []; default message [myMap]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.util.Map' for property 'myMap'; nested exception is java.lang.IllegalStateException: Cannot convert value of type 'java.lang.String' to required type 'java.util.Map' for property 'myMap': no matching editors or conversion strategy found]
at org.springframework.boot.bind.PropertiesConfigurationFactory.checkForBindingErrors(PropertiesConfigurationFactory.java:359)
at org.springframework.boot.bind.PropertiesConfigurationFactory.doBindPropertiesToTarget(PropertiesConfigurationFactory.java:276)
at org.springframework.boot.bind.PropertiesConfigurationFactory.bindPropertiesToTarget(PropertiesConfigurationFactory.java:240)
at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:330)
... 42 more
答案 0 :(得分:1)
用调试器度过了一段美好时光后,
我相信这是TestPropertySourceUtils.addPropertiesFilesToEnvironment()
中的错误/缺失功能:
try {
for (String location : locations) {
String resolvedLocation = environment.resolveRequiredPlaceholders(location);
Resource resource = resourceLoader.getResource(resolvedLocation);
environment.getPropertySources().addFirst(new ResourcePropertySource(resource));
}
}
ResourcePropertySource
只能处理.properties
个文件,而不能处理.yml
。
在常规应用中,YamlPropertySourceLoader
已注册,可以处理.yml
。
作为说明:
TestPropertySourceUtils.addPropertiesFilesToEnvironment()
被称为:
org.springframework.test.context.support.DelegatingSmartContextLoader.prepareContext()
(继承自AbstractContextLoader
)
DelegatingSmartContextLoader
中未指定加载器,则 @ContextConfiguration
是您收到的默认上下文加载器。
(实际上@ContextConfiguration
指定了一个接口,但AbstractTestContextBootstrapper.resolveContextLoader()
将其更改为具体类
要解决此问题,我将配置更改为application-test.properties
并在我的测试中使用该文件。
test=works!
myMap.aKey: aVal
另一条评论:不需要地图上的setter:
使用Spring DataBinder实用程序绑定到类似的属性 (这是@ConfigurationProperties所做的)你需要有一个 java.util.List(或Set)类型的目标bean中的属性和您 或者需要提供一个setter,或者用一个mutable初始化它 价值,例如这将绑定到上面的属性