EurekaHealthCheckHandlerTests.java

/*
 * Copyright 2013-2015 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.eureka;

import java.util.List;

import com.netflix.appinfo.InstanceInfo.InstanceStatus;

import org.junit.Before;
import org.junit.Test;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.boot.actuate.health.OrderedHealthAggregator;
import org.springframework.cloud.client.discovery.health.DiscoveryClientHealthIndicator;
import org.springframework.cloud.client.discovery.health.DiscoveryCompositeHealthIndicator;
import org.springframework.cloud.client.discovery.health.DiscoveryHealthIndicator;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;

import static org.junit.Assert.assertEquals;

/**
 * Tests the {@link EurekaHealthCheckHandler} with different health indicator registered.
 *
 * @author Jakub Narloch
 */
public class EurekaHealthCheckHandlerTests {

    private EurekaHealthCheckHandler healthCheckHandler;

    @Before
    public void setUp() throws Exception {

        healthCheckHandler = new EurekaHealthCheckHandler(new OrderedHealthAggregator());
    }

    @Test
    public void testNoHealthCheckRegistered() throws Exception {

        InstanceStatus status = healthCheckHandler.getStatus(InstanceStatus.UNKNOWN);
        assertEquals(InstanceStatus.UNKNOWN, status);
    }

    @Test
    public void testAllUp() throws Exception {

        initialize(UpHealthConfiguration.class);

        InstanceStatus status = healthCheckHandler.getStatus(InstanceStatus.UNKNOWN);
        assertEquals(InstanceStatus.UP, status);
    }

    @Test
    public void testDown() throws Exception {

        initialize(UpHealthConfiguration.class, DownHealthConfiguration.class);

        InstanceStatus status = healthCheckHandler.getStatus(InstanceStatus.UNKNOWN);
        assertEquals(InstanceStatus.DOWN, status);
    }

    @Test
    public void testUnknown() throws Exception {

        initialize(FatalHealthConfiguration.class);

        InstanceStatus status = healthCheckHandler.getStatus(InstanceStatus.UNKNOWN);
        assertEquals(InstanceStatus.UNKNOWN, status);
    }

	@Test
	public void testEurekaIgnored() throws Exception {

		initialize(EurekaDownHealthConfiguration.class);

		InstanceStatus status = healthCheckHandler.getStatus(InstanceStatus.UP);
		assertEquals(InstanceStatus.UP, status);
	}

    private void initialize(Class<?>... configurations) throws Exception {
        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(configurations);
        healthCheckHandler.setApplicationContext(applicationContext);
        healthCheckHandler.afterPropertiesSet();
    }

    public static class UpHealthConfiguration {

        @Bean
        public HealthIndicator healthIndicator() {
            return new AbstractHealthIndicator() {
                @Override
                protected void doHealthCheck(Health.Builder builder) throws Exception {
                   builder.up();
                }
            };
        }
    }

    public static class DownHealthConfiguration {

        @Bean
        public HealthIndicator healthIndicator() {
            return new AbstractHealthIndicator() {
                @Override
                protected void doHealthCheck(Health.Builder builder) throws Exception {
                    builder.down();
                }
            };
        }
    }

    public static class FatalHealthConfiguration {

        @Bean
        public HealthIndicator healthIndicator() {
            return new AbstractHealthIndicator() {
                @Override
                protected void doHealthCheck(Health.Builder builder) throws Exception {
                    builder.status("fatal");
                }
            };
        }
    }


	public static class EurekaDownHealthConfiguration {
		@Bean
		public DiscoveryHealthIndicator discoveryHealthIndicator() {
			return new DiscoveryClientHealthIndicator(null) {
				@Override
				public Health health() {
					return Health.up().build();
				}
			};
		}

		@Bean
		public DiscoveryHealthIndicator eurekaHealthIndicator() {
			return new EurekaHealthIndicator(null, null, null) {
				@Override
				public Health health() {
					return Health.down().build();
				}
			};
		}

		@Bean
		public DiscoveryCompositeHealthIndicator discoveryCompositeHealthIndicator(List<DiscoveryHealthIndicator> indicators) {
			return new DiscoveryCompositeHealthIndicator(new OrderedHealthAggregator(), indicators);
		}
	}
}