[FIXED] How to force Spring Boot to use Tomcat server in integration tests?

Issue

I use default Tomcat embedded container. However, in some of my tests I use Wiremock (using Jetty underneath). This makes my integration tests run against Jetty server, not Tomcat.

Is there any way to force Spring Boot to stick with Tomcat ?

Solution

As Stéphane Nicoll stated here you should define an empty TomcatEmbeddedServletContainerFactory @Bean

Simply adding such bean was not sufficient for me. I got 'multiple beans' exception. As I was adding that to a custom test starter I just had to make sure, it is added before EmbeddedServletContainerAutoConfiguration resolution took place, i.e:

@Configuration
@AutoConfigureBefore(EmbeddedServletContainerAutoConfiguration.class)
public class ForceTomcatAutoConfiguration {

    @Bean
    TomcatEmbeddedServletContainerFactory tomcat() {
         return new TomcatEmbeddedServletContainerFactory();
    }
}

Edit: In Spring Boot 2.0 this works for me:

@Configuration
@AutoConfigureBefore(ServletWebServerFactoryAutoConfiguration.class)
public class ForceTomcatAutoConfiguration {

    @Bean
    TomcatServletWebServerFactory tomcat() {
         return new TomcatServletWebServerFactory();
    }
}

Answered By - Grzegorz Poznachowski
Answer Checked By - Marie Seifert (JavaFixing Admin)