ContextInstanceDataAutoConfigurationTest.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.autoconfigure.context;

import com.sun.net.httpserver.HttpContext;
import com.sun.net.httpserver.HttpServer;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.boot.test.util.EnvironmentTestUtils;
import org.springframework.cloud.aws.context.support.env.AwsCloudEnvironmentCheckUtils;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Field;

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

/**
 * @author Agim Emruli
 */
public class ContextInstanceDataAutoConfigurationTest {

    private AnnotationConfigApplicationContext context;

    @Before
    public void restContextInstanceDataCondition() throws IllegalAccessException {
        Field field = ReflectionUtils.findField(AwsCloudEnvironmentCheckUtils.class, "isCloudEnvironment");
        assertNotNull(field);
        ReflectionUtils.makeAccessible(field);
        field.set(null, null);
    }

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

    @Test
    public void placeHolder_noExplicitConfiguration_createInstanceDataResolverForAwsEnvironment() throws Exception {
        // Arrange
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext instanceIdHttpContext = httpServer.createContext("/latest/meta-data/instance-id", new MetaDataServer.HttpResponseWriterHandler("testInstanceId"));

        this.context = new AnnotationConfigApplicationContext();
        this.context.register(ContextInstanceDataAutoConfiguration.class);

        // Act
        this.context.refresh();

        // Assert
        assertTrue(this.context.containsBean("AmazonEc2InstanceDataPropertySourcePostProcessor"));

        httpServer.removeContext(instanceIdHttpContext);
    }

    @Test
    public void placeHolder_noExplicitConfiguration_missingInstanceDataResolverForNotAwsEnvironment() throws Exception {
        // Arrange
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext instanceIdHttpContext = httpServer.createContext("/latest/meta-data/instance-id", new MetaDataServer.HttpResponseWriterHandler(null));

        this.context = new AnnotationConfigApplicationContext();
        this.context.register(ContextInstanceDataAutoConfiguration.class);

        // Act
        this.context.refresh();

        // Assert
        assertFalse(this.context.containsBean("AmazonEc2InstanceDataPropertySourcePostProcessor"));

        httpServer.removeContext(instanceIdHttpContext);
    }

    @Test
    public void placeHolder_noExplicitConfiguration_createInstanceDataResolverThatResolvesWithDefaultAttributes() throws Exception {
        // Arrange
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext instanceIdHttpContext = httpServer.createContext("/latest/meta-data/instance-id", new MetaDataServer.HttpResponseWriterHandler("testInstanceId"));
        HttpContext userDataHttpContext = httpServer.createContext("/latest/user-data", new MetaDataServer.HttpResponseWriterHandler("a:b;c:d"));

        this.context = new AnnotationConfigApplicationContext();
        this.context.register(ContextInstanceDataAutoConfiguration.class);

        // Act
        this.context.refresh();

        // Assert
        assertEquals("b", this.context.getEnvironment().getProperty("a"));
        assertEquals("d", this.context.getEnvironment().getProperty("c"));

        httpServer.removeContext(instanceIdHttpContext);
        httpServer.removeContext(userDataHttpContext);
    }

    @Test
    public void placeHolder_customValueSeparator_createInstanceDataResolverThatResolvesWithCustomValueSeparator() throws Exception {
        // Arrange
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext instanceIdHttpContext = httpServer.createContext("/latest/meta-data/instance-id", new MetaDataServer.HttpResponseWriterHandler("testInstanceId"));
        HttpContext userDataHttpContext = httpServer.createContext("/latest/user-data", new MetaDataServer.HttpResponseWriterHandler("a=b;c=d"));

        this.context = new AnnotationConfigApplicationContext();

        EnvironmentTestUtils.addEnvironment(this.context, "cloud.aws.instance.data.valueSeparator:=");

        this.context.register(ContextInstanceDataAutoConfiguration.class);

        // Act
        this.context.refresh();

        // Assert
        assertEquals("b", this.context.getEnvironment().getProperty("a"));
        assertEquals("d", this.context.getEnvironment().getProperty("c"));

        httpServer.removeContext(instanceIdHttpContext);
        httpServer.removeContext(userDataHttpContext);
    }

    @Test
    public void placeHolder_customAttributeSeparator_createInstanceDataResolverThatResolvesWithCustomAttribute() throws Exception {
        // Arrange
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext instanceIdHttpContext = httpServer.createContext("/latest/meta-data/instance-id", new MetaDataServer.HttpResponseWriterHandler("testInstanceId"));
        HttpContext userDataHttpContext = httpServer.createContext("/latest/user-data", new MetaDataServer.HttpResponseWriterHandler("a:b/c:d"));

        this.context = new AnnotationConfigApplicationContext();

        EnvironmentTestUtils.addEnvironment(this.context, "cloud.aws.instance.data.attributeSeparator:/");

        this.context.register(ContextInstanceDataAutoConfiguration.class);

        // Act
        this.context.refresh();

        // Assert
        assertEquals("b", this.context.getEnvironment().getProperty("a"));
        assertEquals("d", this.context.getEnvironment().getProperty("c"));

        httpServer.removeContext(instanceIdHttpContext);
        httpServer.removeContext(userDataHttpContext);
    }
}