ElastiCacheFactoryBeanTest.java

/*
 * Copyright 2013-2014 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.aws.cache;

import com.amazonaws.services.elasticache.AmazonElastiCache;
import com.amazonaws.services.elasticache.AmazonElastiCacheClient;
import com.amazonaws.services.elasticache.model.CacheCluster;
import com.amazonaws.services.elasticache.model.CacheNode;
import com.amazonaws.services.elasticache.model.DescribeCacheClustersRequest;
import com.amazonaws.services.elasticache.model.DescribeCacheClustersResult;
import com.amazonaws.services.elasticache.model.Endpoint;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.springframework.cache.Cache;
import org.springframework.cloud.aws.core.env.ResourceIdResolver;

import java.util.Collections;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class ElastiCacheFactoryBeanTest {

    @Rule
    public ExpectedException expectedException = ExpectedException.none();

    @Test
    public void getObject_availableCluster_returnsConfiguredMemcachedClient() throws Exception {
        // Arrange
        AmazonElastiCache amazonElastiCache = mock(AmazonElastiCacheClient.class);

        DescribeCacheClustersRequest testCache = new DescribeCacheClustersRequest().withCacheClusterId("testCache");
        testCache.setShowCacheNodeInfo(true);

        when(amazonElastiCache.describeCacheClusters(testCache)).
                thenReturn(new DescribeCacheClustersResult().withCacheClusters(new CacheCluster().withConfigurationEndpoint(
                        new Endpoint().withAddress("localhost").withPort(45678)).withCacheClusterStatus("available").withEngine("memcached")));
        ElastiCacheFactoryBean elasticCacheFactoryBean = new ElastiCacheFactoryBean(amazonElastiCache, "testCache",
                Collections.<CacheFactory>singletonList(new TestCacheFactory("testCache", "localhost", 45678)));

        // Act
        elasticCacheFactoryBean.afterPropertiesSet();
        Cache cache = elasticCacheFactoryBean.getObject();

        // Assert
        assertNotNull(cache);
    }

    @Test
    public void getObject_availableClusterWithLogicalName_returnsConfigurationMemcachedClientWithPhysicalName() throws Exception {
        // Arrange
        AmazonElastiCache amazonElastiCache = mock(AmazonElastiCacheClient.class);
        DescribeCacheClustersRequest testCache = new DescribeCacheClustersRequest().withCacheClusterId("testCache");
        testCache.setShowCacheNodeInfo(true);

        when(amazonElastiCache.describeCacheClusters(testCache)).
                thenReturn(new DescribeCacheClustersResult().withCacheClusters(new CacheCluster().withConfigurationEndpoint(
                        new Endpoint().withAddress("localhost").withPort(45678)).withCacheClusterStatus("available").withEngine("memcached")));

        ResourceIdResolver resourceIdResolver = mock(ResourceIdResolver.class);
        when(resourceIdResolver.resolveToPhysicalResourceId("test")).thenReturn("testCache");

        ElastiCacheFactoryBean elastiCacheFactoryBean = new ElastiCacheFactoryBean(amazonElastiCache, "test", resourceIdResolver,
                Collections.<CacheFactory>singletonList(new TestCacheFactory("test", "localhost", 45678)));

        // Act
        elastiCacheFactoryBean.afterPropertiesSet();
        Cache cache = elastiCacheFactoryBean.getObject();

        // Assert
        assertNotNull(cache);
    }

    @Test
    public void getObject_clusterWithRedisEngineConfigured_reportsError() throws Exception {
        //Arrange
        this.expectedException.expect(IllegalArgumentException.class);
        this.expectedException.expectMessage("engine");

        AmazonElastiCache amazonElastiCache = mock(AmazonElastiCacheClient.class);
        DescribeCacheClustersRequest memcached = new DescribeCacheClustersRequest().withCacheClusterId("memcached");
        memcached.setShowCacheNodeInfo(true);

        when(amazonElastiCache.describeCacheClusters(memcached)).
                thenReturn(new DescribeCacheClustersResult().withCacheClusters(new CacheCluster().withEngine("redis").withCacheNodes(new CacheNode().
                        withEndpoint(new Endpoint().withAddress("localhost").withPort(45678)))));

        ElastiCacheFactoryBean elastiCacheFactoryBean = new ElastiCacheFactoryBean(amazonElastiCache, "memcached",
                Collections.<CacheFactory>singletonList(new TestCacheFactory("testCache", "localhost", 45678)));

        // Act
        elastiCacheFactoryBean.afterPropertiesSet();


        // Assert
    }


    private static class TestCacheFactory implements CacheFactory {

        private final String expectedCacheName;
        private final String expectedHostName;
        private final int expectedPort;

        private TestCacheFactory(String expectedCacheName, String expectedHostName, int expectedPort) {
            this.expectedCacheName = expectedCacheName;
            this.expectedHostName = expectedHostName;
            this.expectedPort = expectedPort;
        }

        @Override
        public boolean isSupportingCacheArchitecture(String architecture) {
            return "memcached".equals(architecture);
        }

        @Override
        public Cache createCache(String cacheName, String host, int port) {
            assertEquals(this.expectedCacheName, cacheName);
            assertEquals(this.expectedHostName, host);
            assertEquals(this.expectedPort, port);
            return mock(Cache.class);
        }
    }
}