How to load resource properties in a JUnit Spring context in a multi Gradle project?

I have the following project tree:

├── app
│   ├── build.gradle
│   └── src
│       ├── main
│       │   ├── java
│       │   │   └── child
│       │   │       └── app
│       │   │           └── Application.java
│       │   └── resources
│       │       └── application-default.yaml
│       └── test
│           └── java
│               └── child
│                   └── app
│                       └── ApplicationTest.java
├── build.gradle
├── childA
│   ├── build.gradle
│   └── src
│       └── main
│           └── java
│               └── child
│                   └── a
│                       ├── BaseGreeterImpl.java
│                       ├── ChildAConfig.java
│                       ├── Greeter.java
│                       └── MySpringProperties.java
├── childB
│   ├── build.gradle
│   └── src
│       └── main
│           └── resources
│               ├── application-test.yaml
│               └── childB.properties
├── childC
│   ├── build.gradle
│   └── src
│       ├── main
│       │   ├── java
│       │   │   └── child
│       │   │       └── c
│       │   │           ├── ChildCConfig.java
│       │   │           └── PropertyGreeterImpl.java
│       │   └── resources
│       │       └── childc.properties
│       └── test
│           └── java
│               └── child
│                   └── c
│                       ├── TestYamlImport.java
│                       └── TestGreeter.java
└── settings.gradle

I have the following test class :

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { ChildCConfig.class }, loader = AnnotationConfigContextLoader.class)
@ActiveProfiles("test")
@SpringBootTest
public class TestYamlImport {

    @Autowired
    private MySpringProperties properties;

    @Test
    public void readChildAYaml() {
        assertThat(properties.getName()).isEqualTo("it-is-another-thing");
    }

}

Expected

I expect properties.getName() to read the value from resource childB in childB/src/main/resources/application-test.yaml.

Result

I get null

Reproduction

GitHub: https://github.com/kopax/adk/tree/adk-spring

One liner:

git clone git@github.com:kopax/adk.git && cd adk && git checkout adk-spring && ./gradlew build --info

Question

There is a test called childC/src/test/java/childC/TestGreeter.java in the reproduction project which prove with childB.properties import that it is not a classpath issue.

So here are my questions :

• Is spring limiting the classpath resolution somehow when using @ConfigurationProperties ?

• I haven't found a way to read my application-test.ymlwithin a configuration @Bean initialized in childA from the test scope of childB, how is this possible ?