RibbonClientsEagerInitializationTest.java

/*
 * Copyright 2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.cloud.netflix.ribbon;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.concurrent.atomic.AtomicInteger;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * @author Biju Kunjummen
 */

@RunWith(SpringRunner.class)
@SpringBootTest(properties = {
	"ribbon.eager-load.enabled=true",
	"ribbon.eager-load.clients=testspec1,testspec2"
})
@DirtiesContext
public class RibbonClientsEagerInitializationTest {

	@Test
	public void contextsShouldBeInitialized() {
		assertThat(Foo1.getInstanceCount()).isEqualTo(2);
	}

	static class FooConfig {
		@Bean
		public Foo1 foo() {
			return new Foo1();
		}
	}

	@Configuration
	@EnableAutoConfiguration
	@RibbonClients(
		value = {
			@RibbonClient(name="testspec1", configuration = FooConfig.class),
			@RibbonClient(name="testspec2", configuration = FooConfig.class),
			@RibbonClient(name="testspec3", configuration = FooConfig.class),
		})
	static class RibbonConfig {
	}

	static class Foo1 {
		private static final AtomicInteger INSTANCE_COUNT = new AtomicInteger();

		public Foo1() {
			INSTANCE_COUNT.incrementAndGet();
		}

		public static int getInstanceCount() {
			return INSTANCE_COUNT.get();
		}
	}
}