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How To Scale Automated Testing with Jenkins

How Enterprises Conduct Automated Continuous Testing at Scale with Jenkins

June 22, 2023
Turbo LiTurbo Li
Turbo Li

Achieving stability and reliability in applications hinges on comprehensive testing before release. The rise of cloud-native technologies and automated testing in recent years has enabled faster and more thorough testing processes. Automated testing has become a crucial component of the Agile development pipeline, especially in the context of Continuous Integration and Continuous Deployment practices, which aim to streamline development and testing for enhanced competitiveness and quality-driven outcomes. A range of tools are used to implement CI/CD, with Jenkins emerging as the most popular solution. 

This blog explores the various features and benefits of Jenkins in the context of test automation, shedding light on how this powerful tool can facilitate and enhance the testing process.

Why Should Developers and QA Engineers Utilize Jenkins?

Jenkins is a renowned open-source automation server that excels in test automation within the CI/CD pipeline. It enables seamless building, testing, and deployment of applications, ensuring high-quality software. With its flexible plugin architecture and extensive ecosystem, Jenkins integrates effortlessly with various tools and services, empowering users with automated testing capabilities. Its extensibility allows for customization through plugin creation, making Jenkins a versatile solution for test automation.

Learn more: Continuous Testing - A Complete Guide

Jenkins' automated testing capabilities allow tests to be configured to run automatically every time new code is pushed to the repository, streamlining the testing process and ensuring consistent quality control. To enable the Continuous Integration/Continuous Deployment (CI/CD) pipeline in Jenkins, the Pipeline comes into play, providing a suite of plugins to support the implementation as well as integration of continuous delivery pipelines. Using the Pipeline DSL (domain-specific language), developers can express the steps of their CI/CD process as code, resulting in a straightforward configuration file that can be added to the version control repository and tracked for any changes made to it. By utilizing Jenkins for automated testing in the CI/CD pipeline, development teams can enhance the efficiency and reliability of software development processes.

With various plugins available, Jenkins is designed to optimize the software development process, making it more efficient. Some of the core advantages of Jenkins include the following:

● QA Automation: Jenkins can automate several tasks in the software development process, including building, testing, and deploying code. By automating QA testing processes, Jenkins can minimize the risk of errors and enhance the speed and efficiency of the development process. Below are a few details on how Jenkins facilitates test automation.

  1. Runs Automated Test Suites: Jenkins comes with plugins for various test frameworks, such as Selenium, Cucumber, and Appium, that enable automated test suites to be executed in CI pipelines.
  1. Summarizes the results: Most Jenkins plugins provide a summarized overview of the test results, which can be accessed and reviewed on a user-friendly HTML page.
  1. Provides Trends: Jenkins also tracks the test results over time and visualizes them in a trend graph, providing stakeholders with a better understanding of test performance and progress.
  1. Displays details on Test Failures: Jenkins meticulously logs test results, including detailed information on test failures, to facilitate efficient troubleshooting by developers and testers.

● Customization: Jenkins is highly customizable, with a wide range of plugins available that enable users to tailor Jenkins to their specific needs. This makes it possible to integrate Jenkins with various tools and processes, allowing organizations to build a custom software development workflow.

● Collaboration: Jenkins can be configured to send notifications to team members and stakeholders when specific events occur, such as the completion of a build or the detection of an error. This helps to facilitate collaboration and improve communication within the development team.

● Scalability: Jenkins is designed for easy scalability and can handle a large number of builds and deployments. This makes it suitable for use in organizations of all sizes, from small startups to large enterprises.

Also read: What is Continuous Monitoring in DevOps?

What Are the Challenges of Using Jenkins that SREs Should Keep in Mind?

Jenkins, despite being a popular tool for automated testing in CI/CD pipelines, comes with its own set of limitations. Here are some of them:

  • With a large number of contributors, Jenkins has a multitude of plugins for single-tool integration, which can make it challenging for users to select the right one.
  • Although Jenkins has plugins that support Docker integration, it still needs to catch up in this domain compared to other tools.
  • Jenkins does not offer a cloud-based service, and users must rely on cloud service providers like AWS, GCP, Azure, Cloudbees, etc.
  • With a complex configuration, Jenkins has a steep learning curve, and new users might find it overwhelming.
  • Plugins in Jenkins need to be customizable, limiting flexibility for users.
  • Lack of authentication/authorization rules and options in Jenkins.
  • Most community-driven plugins in Jenkins need clear documentation on how to use them.

How Should Testers Approach Continuous Integration Using Jenkins

In spite of its limitations, Jenkins remains the most effective tool for implementing automated testing in CI/CD pipelines. The extensive range of plugins and the strong community support make it a powerful ally for automation efforts, regardless of the software being tested.

As already discussed, Jenkins boasts a plugin system that enables easy job building and third-party service integrations with cloud providers. Despite this, Jenkins is simply an additional layer above the OS of the build agent, meaning any command that the agent's command line supports can be executed via Jenkins. This makes Jenkins an orchestrator of commands within a pipeline.

To get started with Jenkins, you could begin with the shell plugin, which allows defining the commands for the pipeline. Common commands for automated testing within a CI/CD pipeline might include compiling the application, running various tests (unit, integration, or functional), and generating an application artifact deployable across different environments.

If you're working with a .NET application, the necessary commands for automated testing might include:

dotnet build
dotnet test
dotnet publish

At its core, a Jenkins pipeline is a collection of plugins that facilitates implementing and integrating continuous delivery pipelines within Jenkins. This is done by using a Jenkinsfile, a text file stored in source control that defines the pipeline.

A Jenkins pipeline follows a structured approach comprising stages and steps which include:

● General

Specify the project name, along with a description. This is where you can add any job parameters and configure log rotation.

● Source Code Management

Input the URL of your source code repository in the Jenkins CI server to start the automated testing process.

● Build Triggers

Define when to complete a job and schedule it, based on a specific timeline or after a change is made for Continuous Testing.

● Build Environment

Choose options based on the environment in which you execute the build, such as setting up Continuous Monitoring, choosing when to abort the build, and adding time-out actions.

● Build

This step is critical for automated testing and Continuous Integration/Deployment. Select the option you need, depending on which plugins you install and use.

● Post-build Actions

Configure how the results of a job would be reported, such as sending email updates on the job status and setting up notifications for Continuous Monitoring.

Learn more: How Does Continuous Testing Accelerate DevOps?

How HeadSpin Empowers Organizations to Optimize Automated Continuous Testing

The HeadSpin Platform empowers development and QA teams with comprehensive continuous testing capabilities across various technologies. It focuses on the following:

  • CI/CD Integration: Seamless test automation for new builds by automatically analyzing builds, executing tests, and providing performance regression insights.
  • Continuous Monitoring: 24/7 access to any device running any application on any network worldwide for continuous quality assurance.
  • Parallel Testing: HeadSpin provides a user-friendly interface along with integrations and automation features, enabling the execution of multiple tests simultaneously. This capability enhances scalability and expands the test coverage. Additionally, the platform enables the testing of mobile applications on devices located in various global locations, accommodating different time zones and network conditions. By facilitating parallel testing, HeadSpin ensures the integrity of the system.

With the HeadSpin plugin, every session is associated with a build_id, enabling tracking devices used during a build and providing end-of-build statistics based on HeadSpin performance data.

The Platform supports mobile, web, IoT, and 5G applications, offering functional, load, and performance testing. Throughout the software development lifecycle, HeadSpin facilitates continuous testing and monitoring with its main features aligned with the critical components of continuous testing:

  • Automated User Journeys: Integration of popular test automation platforms like Appium or Selenium to automate various customer user journeys.
  • Performance Regression: Comparison of performance across builds, locations, networks, and devices to identify performance variations over time.
  • API Usage Monitoring: Monitoring of application usage of APIs or tracking the impact of third-party APIs on application performance.
Learn more: Uncovering a Few Popular Android Test Automation Frameworks

Wrapping Up

Jenkins is ideal for test automation, working seamlessly with CI methodologies and expediting the testing process. With its comprehensive features and continuous evolution, Jenkins offers companies a powerful, all-in-one tool for efficient test automation. By embracing Jenkins, teams gain confidence through quick result visibility and enjoy the numerous advantages it brings to their testing efforts.

HeadSpin facilitates seamless integrations with various CI/CD tools, enabling automated tests on multiple devices and browsers across the globe through its extensive real-device cloud.

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Q1. What are the three types of pipelines available in Jenkins?

Ans: Jenkins has three main pipeline types: Declarative, Scripted, and Shared Libraries. Declarative pipelines offer simplicity and readability, Scripted pipelines provide flexibility with Groovy scripts, and Shared Libraries allow reusable pipelines across projects.

Q2. Is Jenkins primarily used for CI, CD, or both?

Ans: Jenkins is a platform that enables CI/CD automation in the software development process. It offers tools and features for building, testing, and deploying updates, supporting multiple languages and automation tasks.

How Enterprises Conduct Automated Continuous Testing at Scale with Jenkins

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