package com.example.demo;

import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

public class ImportVersusDirectRegistrationTests {

	@Test
	public void thingIsAvailableWhenOuterConfigurationIsRegisteredDirectly() {
		try (AnnotationConfigApplicationContext directRegistration = new AnnotationConfigApplicationContext()) {
			directRegistration.register(AccidentalLiteConfiguration.class);
			directRegistration.refresh();
			directRegistration.getBean(Thing.class);
		}
	}

	@Test
	public void thingIsAvailableWhenOuterConfigurationIsImported() {
		try (AnnotationConfigApplicationContext viaImport = new AnnotationConfigApplicationContext()) {
			viaImport.register(Importer.class);
			viaImport.refresh();
			viaImport.getBean(Thing.class);
		}
	}

}

@Import(AccidentalLiteConfiguration.class)
class Importer {

}

class AccidentalLiteConfiguration {

	@Configuration
	class InnerConfiguration {

		@Bean
		public Thing thing() {
			return new Thing();
		}

	}

}

class Thing {

}