@Nested class takes default application.properties values

Question

Could you tell me why if I have integration test like:

@TestPropertySource(properties = {"spring.application.environment=dev"})
@SpringBootTest
class IntegrationTest  {

@Autowired
PropertyConfig propertyConfig;

@Nested
@SpringBootTest
@TestPropertySource(properties = {"spring.application.environment=dev", "spring.application.property=example"})
class ServerLoadConfiguration  {
    
    @Test

    void exampleTest() {
String someProperty = propertyConfig.getSomeProperty(); // old value
        ....
    }
}

for exampleTest I get values of properties from 'default' properties instead of overridden with that one property specified in @TestPropertySource spring.application.property?

If I make @TestPropertySource(properties = {"spring.application.environment=dev", "spring.application.property=example"}) on IntegrationTest level, then nested class have this value applied.

Answer 1

Sorry, cannot reproduce, with:

1. With simple(st) quickstarter
2. Simple (java>16) props:

   package com.example.demo;
   
   import org.springframework.boot.context.properties.ConfigurationProperties;
   
   @ConfigurationProperties("my")
   record PropertyConfig(String foo) { }
   

3. Simple(st) Config:

   package com.example.demo;
   
   import org.springframework.boot.SpringApplication;
   import org.springframework.boot.autoconfigure.SpringBootApplication;
   import org.springframework.boot.context.properties.EnableConfigurationProperties;
   
   @SpringBootApplication
   @EnableConfigurationProperties(PropertyConfig.class)
   public class DemoApplication {
   
     public static void main(String[] args) {
       SpringApplication.run(DemoApplication.class, args);
     }
   
   }
   

4. Test:

   package com.example.demo;
   
   import org.junit.jupiter.api.Assertions;
   import org.junit.jupiter.api.Nested;
   import org.junit.jupiter.api.Test;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.boot.test.context.SpringBootTest;
   import org.springframework.context.ApplicationContext;
   import org.springframework.test.context.TestPropertySource;
   
   @SpringBootTest
   @TestPropertySource(properties = {"my.foo=bar"})
   public class DemoApplicationIT {
   
     @Autowired
     private PropertyConfig my;
   
     @Nested
     class InnerDefaultIT {
   
       @Autowired
       private PropertyConfig myInner;
   
       @Test
       void testInner() {
         Assertions.assertNotNull(myInner.foo());
         Assertions.assertEquals(my.foo(), myInner.foo());
       }
     }
   
     @Nested
     @TestPropertySource(properties = {"my.foo=baz"})
     class InnerIT {
   
       @Autowired
       private PropertyConfig myInner;
   
       @Test
       void testInner() {
         Assertions.assertEquals("bar", my.foo());
         Assertions.assertEquals("baz", myInner.foo());
       }
     }
   
     @Test
     void testOuter() {
       Assertions.assertEquals("bar", my.foo());
     }
   
   }
   
   

5. Passes (as "unit" as "integration"):

   Tests run: 3, Failures: 0, Errors: 0, Skipped: 0