ContextStackConfigurationTest.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.context.config.annotation;

import com.amazonaws.services.cloudformation.AmazonCloudFormation;
import com.amazonaws.services.cloudformation.model.DescribeStackResourcesRequest;
import com.amazonaws.services.cloudformation.model.DescribeStackResourcesResult;
import com.amazonaws.services.cloudformation.model.ListStackResourcesRequest;
import com.amazonaws.services.cloudformation.model.ListStackResourcesResult;
import com.amazonaws.services.cloudformation.model.StackResource;
import com.amazonaws.services.cloudformation.model.StackResourceSummary;
import com.sun.net.httpserver.HttpContext;
import com.sun.net.httpserver.HttpServer;
import org.junit.After;
import org.junit.Test;
import org.mockito.Mockito;
import org.springframework.cloud.aws.context.MetaDataServer;
import org.springframework.cloud.aws.core.env.stack.StackResourceRegistry;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Collections;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

public class ContextStackConfigurationTest {


    private AnnotationConfigApplicationContext context;

    @After
    public void tearDown() throws Exception {
        if (this.context != null) {
            this.context.close();
        }

        MetaDataServer.shutdownHttpServer();
    }

    @Test
    public void stackRegistry_noStackNameConfigured_returnsAutoConfiguredStackRegistry() throws Exception {
        //Arrange
        this.context = new AnnotationConfigApplicationContext();
        this.context.register(ApplicationConfigurationWithEmptyStackName.class);
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext httpContext = httpServer.createContext("/latest/meta-data/instance-id", new MetaDataServer.HttpResponseWriterHandler("test"));

        //Act
        this.context.refresh();

        //Assert
        StackResourceRegistry stackResourceRegistry = this.context.getBean(StackResourceRegistry.class);
        assertNotNull(stackResourceRegistry);
        assertEquals("testStack", stackResourceRegistry.getStackName());

        httpServer.removeContext(httpContext);
    }

    @Test
    public void stackRegistry_stackNameConfigured_returnsConfiguredStackRegistryForName() throws Exception {
        //Arrange
        this.context = new AnnotationConfigApplicationContext();
        this.context.register(ManualConfigurationStackRegistryTestConfiguration.class);

        //Act
        this.context.refresh();

        //Assert
        StackResourceRegistry stackResourceRegistry = this.context.getBean(StackResourceRegistry.class);
        assertNotNull(stackResourceRegistry);
        assertEquals("manualStackName", stackResourceRegistry.getStackName());
    }

    @Configuration
    @EnableStackConfiguration
    static class ApplicationConfigurationWithEmptyStackName {

        @Bean
        public AmazonCloudFormation amazonCloudFormation() {
            AmazonCloudFormation amazonCloudFormation = Mockito.mock(AmazonCloudFormation.class);
            Mockito.when(amazonCloudFormation.describeStackResources(new DescribeStackResourcesRequest().withPhysicalResourceId("test"))).
                    thenReturn(new DescribeStackResourcesResult().withStackResources(new StackResource().withStackName("testStack")));
            Mockito.when(amazonCloudFormation.listStackResources(new ListStackResourcesRequest().withStackName("testStack"))).
                    thenReturn(new ListStackResourcesResult().withStackResourceSummaries(Collections.<StackResourceSummary>emptyList()));
            return amazonCloudFormation;
        }
    }

    @Configuration
    @EnableStackConfiguration(stackName = "manualStackName")
    static class ManualConfigurationStackRegistryTestConfiguration {

        @Bean
        public AmazonCloudFormation amazonCloudFormation() {
            AmazonCloudFormation amazonCloudFormation = Mockito.mock(AmazonCloudFormation.class);
            Mockito.when(amazonCloudFormation.listStackResources(new ListStackResourcesRequest().withStackName("manualStackName"))).
                    thenReturn(new ListStackResourcesResult().withStackResourceSummaries(Collections.<StackResourceSummary>emptyList()));
            return amazonCloudFormation;
        }
    }

}