WireMockInitializer.java

public class WireMockInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

    @Override
    public void initialize(ConfigurableApplicationContext applicationContext) {

        WireMockServer wireMockServer =
                new WireMockServer(new WireMockConfiguration().dynamicPort());

        wireMockServer.start();

        applicationContext.addApplicationListener(applicationEvent -> {
            if (applicationEvent instanceof ContextClosedEvent) {
                wireMockServer.stop();
            }
        });

        applicationContext.getBeanFactory()
                .registerSingleton("wireMockServer", wireMockServer);

        TestPropertyValues
                .of(Map.of("customer-service.urls.base-url", wireMockServer.baseUrl()))
                .applyTo(applicationContext);

    }
}