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Jenkins for Test Automation : Tutorial

Jenkins is the most widely adopted solution for continuous delivery, thanks to its extensibility and a vibrant, active community. Continuous integration is one of the most important terms used in DevOps when it comes to integrating different DevOps stages. Jenkins is the most popular and widespread tool that DevOps teams use to create software projects by developing and testing them continuously. It offers the most needed automation to accelerate the development process.

How Jenkins works

It is a collection of plugins that allow the creation and integration of Continuous Delivery pipelines in Jenkins. Build Jobs are processes that allow you configure a string of
software development processes that help you develop your software. Jenkins is a Java-based DevOps automation tool for continuous integration/continuous delivery and deployment (CI/CD). Yes, Jenkins is the top open-source automation server with hundreds of plugins to build, deploy, and automate any development project. Curly brackets enclose each step in the pipeline, expressed as a command with arguments.

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Its support for cloud environments is particularly notable because it gives developers more web development options, including building cloud-native applications. CI is a process that enables you to integrate code changes from multiple developers working on a single project quickly and repeatedly. If the tests pass, the code can be integrated into the build, which can similarly be tested and immediately verified. Of course, to realize the benefits of a DevOps framework, it has to be implemented effectively. For example, Continuous Integration (CI) and Continuous Delivery (CD) are both considered to be integral to any DevOps model. The main goal in continuous delivery is to make deployments predictable as routine activities that can be achieved upon request.

We’ve written before about the impact that the DevOps movement is having on business operations. The process helps improve speed of delivery, encourages greater collaboration across teams and sets up an infrastructure that is reliable and scalable. In an application development project, there would be a stream of continuous delivery pipelines that operate from start to finish. Jenkins pipeline consists of plugins that help integrate these delivery pipelines into Jenkins. Continuous Integration is a process of integrating code changes from multiple developers in a single project many times.

Jenkins Slave

A CD pipeline is a sequence of events in which these states work. Every change made to the software has to pass via multiple complex processes before the release. Before using Jenkins, an organization might need to manually launch its testing solutions – lengthening the QA process and making it substantially more expensive. After Jenkins, an organization can instead automatically create a build and push it toward testing – making it easier to push commits down the CI/CD pipeline. Jenkins has remained one of the most popular build/test solutions for Agile development, CI/CD, and DevOps with Jenkins because it is ubiquitous. Its thriving community provides phenomenal support, and its code base is incredibly stable.

  • It was a tool to perform Continuous Integration (CI) by conducting automated tests on his code as changes were being made to it.
  • So it was decided that the tool
    would be split into two; something oracle could call its own, “Hudson” and “Jenkins”
    which was to be a completely community driven project.
  • This type of approach is useful when you need to develop complex and extremely large software applications.
  • Initially, a developer integrates a new piece of code into the existing source code and commits.
  • The backbone of Jenkins is the community and the community members have been instrumental in the development (and testing) of close to 1500+ plugins available in the Update Center.

Keep in mind that read-only Jenkins images are accessible in the Docker Hub online repository. Jenkins is a well-known continuous integration tool developed initially by Hudson before it became available on the open-source market. Hudson was created by Kohsuke Kawaguchi in 2004 while working at Sun Microsystems (acquired by Oracle). There was a disagreement between Oracle and the Hudson community about the infrastructure employed after Oracle purchased Sun Microsystems in 2010. In both cases, automation reduces the number of errors that occur because the correct steps and best practices are encoded into Jenkins.

Types of Jenkins Pipelines

Jenkins was originally
developed under the name Hudson back in 2004 by the organisation sun
microsystems. Slowly but surely Hudson started becoming popular with other
companies and other people. Let us know see how the syntax of Scripted and declarative pipelines differ. Scripted and declarative https://www.globalcloudteam.com/ pipelines are different only in terms of the programmatic approach. While declarative pipelines use a declarative programming model, scripted ones leverage the imperative programming model. It is important to note that both these types of pipelines run on the Jenkins subsystem.

You might need to modify your Jenkinsfile to enable it to run with the project. For example, you can modify the shcommand to let it run the same command that would be run on a local machine. Once you’ve set up the pipeline, Jenkins hire jenkins developers will be able to automatically detect new pull requests and branches created in your source control repository. You can create pipelines directly in the user interface, or create a “Jenkinsfile” which represents a pipeline as code.

Jenkins and the Continuous Delivery Foundation

This incredible community supports the project and plays a significant role in its success. At present, there are millions of downloads and active users of Jenkins. Continuous integration is a procedure to integrate all the code changes done by several developers in one project. A code is repeatedly tested after a commit to guarantee the code is error and bug-free. Written in Java, Jenkins allows continuous development, testing, and deployment of newly created codes. Fast-forward to 2011, and a dispute between Oracle (which had acquired Sun) and the independent Hudson open source community led to a fork with a name change, Jenkins.

How Jenkins works

A pipeline is a series of steps the Jenkins server will take to perform the required tasks of the CI/CD process. The Jenkinsfile uses a curly bracket syntax that looks similar to JSON. Steps in the pipeline are declared as commands with parameters and encapsulated in curly brackets.

Industry Use Cases of Jenkins

As the primary objective of microservices architecture is to update existing features or add new features continuously, Jenkins comes in handy as it automates various development and deployment tasks. So when you incorporate Jenkins into your suite of development tools, you will find it easier to develop applications that leverage the microservices architecture. When used as a continuous integration tool, Jenkins aids software development teams in quickly locating and fixing bugs as well as automating the integration of new code as it is developed. With a plethora of continuous integration tools available out there, Jenkins is among the top-ranked ones. Jenkins is an open-source automation tool developed in Java primarily for continuous integration.

How Jenkins works

The usage spread across the world with a current estimate of 1.6 million users. Although Jenkins requires scripting some automation steps, the program provides a fast and robust way to systematize the software development lifecycle. Jenkins is a platform for creating a Continuous Integration/Continuous Delivery (CI/CD) environment.

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All development life-cycle elements can be easily integrated into the product for every new feature or customization. This includes the creation of new builds, documents, packaging, staging, deployment, analysis, etc. Jenkins is a popular self-contained, open-source automation server to perform continuous integration and build automation. Its elementary functionality is executing a predefined list of phases or jobs. In other words, every change in a repository triggers a pipeline of jobs that evaluates and executes different tasks to accomplish what has been previously defined. As a continuous integration tool, Jenkins helps development teams identify errors in the early stages of a project, and automate the integration process of new code.

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