Spring boot Test fails saying, Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean
This message says: You need to configure at least 1 ServletWebServerFactory bean in the ApplicationContext, so if you already have spring-boot-starter-tomcat you need to either autoconfigure that bean or to do it manually.
So, in the test there are only 2 configuration classes to load the applicationContext, these are = { WebsocketSourceConfiguration.class, WebSocketSourceIntegrationTests.class }, then at least in one of these classes there should be a @Bean method returning an instance of the desired ServletWebServerFactory.
* SOLUTION *
Make sure to load all the beans within your configuration class
WebsocketSourceConfiguration {
@Bean
ServletWebServerFactory servletWebServerFactory(){
return new TomcatServletWebServerFactory();
}
}
OR also enable the AutoConfiguration to do a classpath scanning and auto-configuration of those beans.
@EnableAutoConfiguration
WebsocketSourceConfiguration
Can be done also at the Integration Test class.
@EnableAutoConfiguration
WebSocketSourceIntegrationTests
For more information check the SpringBootTest annotation documentation https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/test/context/SpringBootTest.html