值注释在 Junit 测试中不起作用

@SpringBootTest
public class RuleControllerTest {

@Value("${myUrl}")
private String myUrl;
private HttpClient httpClient = HttpClients.createDefault();

@Test
public void loadAllRules() throws IOException, URISyntaxException {
    String target = myUrl + "/v2/rules";
    String json = generateHTTPget(target);

    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    Rule[] rules = objectMapper.readValue(json, Rule[].class);

    boolean correctResponse = rules != null ? true : false;
    int httpCode = getHTTPcode(target);
    boolean correctStatus = httpCode >= 200 && httpCode <= 300 ? true : false;

    assertTrue(correctStatus);
    assertTrue(correctResponse);
}

我试图从 application.properties 文件中获取一个字符串，并将 @Value 插入到 Junit 测试的字段中。我以前在普通课堂上做过这个，但在测试中我的字段为空。我读过有关此问题的类似问题，到目前为止尝试创建 src/test/resources 包并在那里克隆 application.properties 。还尝试添加依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-test</artifactId>
   <scope>test</scope>
</dependency>

并添加注释

@RunWith(SpringRunner.class)

我收到一条消息 Notestsfound with test runner Junit 5 并且在 Problems 选项卡中我无法读取 springboottest.jar 或者不是有效的 ZIP 文件

也尝试过

@PropertySource("classpath:application.properties")

作为类注释，但结果相同

我也尝试过：

@RunWith(SpringJUnit4ClassRunner.class)

如果我将字符串 myUrl 硬编码为“http://本地主机:8090 http://localhost:8090“测试有效，所以问题在于@Value 不起作用

以下对我有用。它从 application.properties 文件中获取值。

@RunWith(SpringRunner.class)
@ContextConfiguration(initializers = ConfigFileApplicationContextInitializer.class)
public class ValueAnnotationTest {

    @Value("${myUrl}")
    private String myUrl;

    @Test
    public void test1() throws Exception {
    assertThat(myUrl).isEqualTo("http://test.com");
    }
}

From Spring Boot 文档 https://docs.spring.io/spring-boot/docs/2.2.2.RELEASE/reference/html/spring-boot-features.html#boot-features-configfileapplicationcontextinitializer-test-utility:

Using ConfigFileApplicationContextInitializer单独不提供 支持@Value("${…​}")注射。它唯一的工作是确保application.properties文件被加载到 Spring 的环境中。为了@Value支持，您需要另外配置一个PropertySourcesPlaceholderConfigurer or use @SpringBootTest， 哪个 为您自动配置一个。