Override default Spring-Boot application.properties settings in Junit Test with dynamic value

Question

I want to override properties defined in application.properties in tests, but @TestPropertySource only allows to provide predefined values.

What I need is to start a

Answer 1

As of Spring Framework 5.2.5 and Spring Boot 2.2.6 you can use Dynamic Properties in tests:

@DynamicPropertySource
static void dynamicProperties(DynamicPropertyRegistry registry) {
    registry.add("property.name", "value");
}