ContextInstanceDataConfigurationTest.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.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.cloud.aws.context.MetaDataServer;
import org.springframework.cloud.aws.context.support.env.AwsCloudEnvironmentCheckUtils;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Field;

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

public class ContextInstanceDataConfigurationTest {

    private AnnotationConfigApplicationContext context;

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

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

        //Act
        this.context.refresh();

        //Assert
        assertTrue(this.context.getBeanFactoryPostProcessors().isEmpty());
    }

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

        //Act
        this.context = new AnnotationConfigApplicationContext(ApplicationConfiguration.class);

        //Assert
        assertEquals("test", this.context.getEnvironment().getProperty("instance-id"));
        httpServer.removeContext(httpContext);
    }

    @Test
    public void propertySource_enableInstanceDataWithCustomAttributeSeparator_propertySourceConfiguredAndUsesCustomAttributeSeparator() throws Exception {
        //Arrange
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext httpContext = httpServer.createContext("/latest/user-data", new MetaDataServer.HttpResponseWriterHandler("a:b/c:d"));

        //Act
        this.context = new AnnotationConfigApplicationContext(ApplicationConfigurationWithCustomAttributeSeparator.class);

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

        httpServer.removeContext(httpContext);
    }

    @Test
    public void propertySource_enableInstanceDataWithCustomValueSeparator_propertySourceConfiguredAndUsesCustomValueSeparator() throws Exception {
        //Arrange
        HttpServer httpServer = MetaDataServer.setupHttpServer();
        HttpContext httpContext = httpServer.createContext("/latest/user-data", new MetaDataServer.HttpResponseWriterHandler("a=b;c=d"));

        //Act
        this.context = new AnnotationConfigApplicationContext(ApplicationConfigurationWithCustomValueSeparator.class);

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

        httpServer.removeContext(httpContext);
    }

    @Configuration
    @EnableContextInstanceData
    public static class ApplicationConfiguration {

    }

    @Configuration
    @EnableContextInstanceData(attributeSeparator = "/")
    public static class ApplicationConfigurationWithCustomAttributeSeparator {

    }

    @Configuration
    @EnableContextInstanceData(valueSeparator = "=")
    public static class ApplicationConfigurationWithCustomValueSeparator {

    }

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