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Testing Observable Pattern Implementation with AspectJ Weaving in Netflix Hystrix

This test suite validates the Observable pattern implementation in Hystrix using AspectJ compile-time weaving. It extends the BasicObservableTest class to verify reactive programming functionality and command execution patterns in a Netflix Hystrix environment.

Test Coverage Overview

The test suite provides comprehensive coverage of Observable-based command execution in Hystrix.

Key areas tested include:

Reactive pattern implementation
AspectJ compile-time weaving integration
User service command execution
Observable command chain behavior

Implementation Analysis

The testing approach utilizes inheritance from BasicObservableTest to leverage common test scenarios while implementing environment-specific configurations. The implementation employs AspectJ compile-time weaving mode through system property configuration and customizes the UserService creation process.

Technical patterns include:

Test inheritance structure
Environment-specific service initialization
Compile-time aspect weaving

Technical Details

Testing tools and configuration:

JUnit test framework
AspectJ compile-time weaver
System property configuration for weaving mode
Custom UserService implementation
Hystrix Observable command patterns

Best Practices Demonstrated

The test implementation showcases several testing best practices in the Hystrix ecosystem.

Notable practices include:

Clean separation of concerns through test inheritance
Proper test environment configuration
Specific weaving mode declaration
Consistent service initialization patterns

netflix/hystrix

hystrix-contrib/hystrix-javanica/src/ajcTest/java/com/netflix/hystrix/contrib/javanica/test/aspectj/observable/ObservableTest.java

            
/**
 * Copyright 2016 Netflix, Inc.
 *
 * 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 com.netflix.hystrix.contrib.javanica.test.aspectj.observable;

import com.netflix.hystrix.contrib.javanica.test.common.observable.BasicObservableTest;
import org.junit.BeforeClass;

/**
 * Created by dmgcodevil
 */
public class ObservableTest extends BasicObservableTest {

    @BeforeClass
    public static void setUpEnv() {
        System.setProperty("weavingMode", "compile");
    }

    @Override
    protected UserService createUserService() {
        return new UserService();
    }
}