How to Ensure Robust Testing in CI/CD?
Software development has undergone significant changes over the years to accommodate agility and ease of maintenance. Practices like Continuous Integration (CI) and Continuous Delivery (CD) have become mainstream now which empower organizations with faster release rate, reduced costs, and improved customer satisfaction. In ensuring easy maintenance and reduced costs, the role of QA in CI/CD pipeline becomes indispensable.
Let us understand the importance of CI/CD pipeline automation testing and get to know some actionable tips on how to implement QA in the CI/CD pipeline. Let’s jump right in!
What do CI and CD mean?
Continuous Integration (CI)
In the modern-day application development approach, projects are broken down into simpler bits, and after division, they are all merged together into the main body, also known as the trunk. CI is the application development methodology wherein the code is integrated within the data repository several times in a day.
Continuous Delivery (CD)
Continuous Delivery is an extension of Continuous Integration that helps in releasing all the changes at the production-end of development. The primary purpose of Continuous Deployment is to ensure predictability in scheduled maintenance.
Importance of QA in CI/CD Pipeline
Continuous QA accelerates delivery and deployment while fixing any recently introduced bugs. Most importantly, CI/CD pipeline QA acts as a safety net, which allows the developers to focus primarily on the code, its changes, and the shipping updates, rather than worrying about testing!
Challenges of Manual Testing in CI/CD Pipeline
Even though the CI/CD pipeline pushes for continuous development, testing, and deployment, it is often plagued with manual testing. One of the greatest issues with manual testing is the delay per iteration, which starts accruing and pushing the deployment back. Slow feedback, slower changes, and painfully slow releases defeat the very purpose of CI/CD as manual testing is unable to keep up with the dynamic requirements.
At the same time, there is a need to run multiple tests depending on the objective of test suites. To conduct these tests, one needs to first identify the test cases and then run them one at a time. Hence, manual testing makes the process sluggish by many folds.
Finally, the test cycles call for separate test environments that teams will have to build manually, upgrade, and tear down. The effort that goes into mimicking the end-user environment may require multiple permutations and combinations that the team will have to identify, build, and update.
Need for Automation Testing in CI/CD Pipeline
Even though manual testing is prevalent, it is evident that it is a failing battle. Following are the clear advantages of CI/CD pipeline automation testing:
- It allows for quicker, more responsive feedback loops that continuously test the codes and share feedback within a span of a few minutes. Resultantly, the CI/CD pipeline witnesses rapid acceleration.
- Automation helps in the detection of test procedures and has room for parallel testing capabilities. Teams can run automated cross-browser concurrent tests that will reduce the testing time and improve test coverage.
- Through automated testing, teams can enjoy automatic provisioning that helps in setting up test environments in just a few clicks! Test automation tools come equipped with the latest versions of operating systems and browsers. Hence, teams do not have to spend valuable time manually recreating the various environments.
- Continuous testing and QA allows the development team to meet the quality and security requirements consistently. Furthermore, it offers greater scalability than manual testing.
While manual testing can be reserved for specific testing types and modules, such as exploratory testing, it is best to automate testing for seamless integration of QA in the CI/CD pipeline.
Tips on How to Implement QA in CI/CD Pipeline?
To modify the CI/CD pipeline, QA professionals can introduce the following actionable measures:
1. Use Selenium for Automated Cross-Browser Testing
Different browsers (and sometimes the different versions of the same browser) operate on different protocols and engines. Regardless, the performance of the website should remain consistent throughout. Hence, it is crucial to perform cross-browser testing through Selenium.
2. Select the Right Set of CI/CD Tools
Given the diverse range of CI/CD tools, it can be confusing to identify the ones that you require. Typically, it should match your overall requirements and support the platforms, frameworks, and technologies that you require.
3. Align the Testers with the Developers
Naturally, for the perfect CI/CD pipeline automation testing, the developers and testers must work hand-in-hand to achieve the desired results. Through early-stage incorporation, the overall quality of the project will improve rather than posing it as an afterthought. Further, it will decrease the time-to-market, and you will deliver high-quality, tested applications frequently.
4. Closely Monitor Load Clashes
With an automated pipeline, one can expect a stable, bug-free build that is ready for deployment. And while it is deployed, developers must gain access to test reports, especially those containing any issues or failures. These reports will shed light on the reasons why it failed the test and the user behavior that led to the load clash. As a result, developers can make changes according to these findings.
5. Document Every Aspect of CI/CD Pipeline
Documentation helps maintain the testing quality during automated unit testing, which also improves the quality of solutions. Automated unit tests contribute to self-documentation, where code maintenance plays a crucial role in software development. As a result, developers can benefit from a testing model that develops through self-learning. At the same time, the main documentation helps mitigate any software risk and takes care of maintenance.
Common CI/CD Tools
Developers use common CI/CD tools to introduce automation in the development, testing, and deployment stages. Some tools are designed specifically for CI, and some are better at managing CD.
Some of the most common CI/CD automation tools used by development teams include:
- Jenkins for end-to-end CI/CD framework implementation and execution
- Tekton Pipelines for CI/CD automation over the Kubernetes platform
- Gitlab for version control and cloud-based CI techniques
- Bamboo for CI when operating on Jira
- Spinnaker for continuous delivery over multi-cloud platforms
- GoCD, which is a server for CI/CD that rests heavily on visualization and modelling
- Concourse for CI/CD management
- Screwdriver for CD
Teams may even find managed CI/CD test automation tools offered by a wide range of vendors.
How to Set up Automation Testing in CI/CD Pipeline?
You can get the best out of the automation testing in CI/CD pipeline through the following measures:
1. Introduce incremental changes
Introducing QA in CI/CD cannot be an overnight change. Hence, make use of a feature-by-feature approach to start with the larger features that need to be broken down into smaller test features. In doing so, development teams can also manage their commits.
2. Locate parts that call for automation
On seeing the clear advantages of CI/CD pipeline automation testing, one may want to dive right in and automate everything. However, it is best to first automate those stages and test cases that genuinely ask for it. It is better to assign priorities and work your way through them.
3. Set up parallel testing features
Parallel and automated cross-browser tests increase coverage and reduce test times. Hence, run the tests in parallel and scale the server size to accelerate them.
4. Program automatic triggers
For perfect and smooth hand-offs, developers must define automatic triggers to deploy the services to the development environment after the code and builds pass all the tests.
5. Enable Smoke Tests
Every deployment should be followed by an automatic smoke test. This smoke test will ensure that the code retains its original and core functionality despite the changes. In case the smoke test is positive, the CI/CD pipeline QA must initiate automatic deployment.
6. Remove duplication
Test duplication slows down the regression and automation in the CI/CD pipeline. Therefore, monitor all the test suites to identify similar test scenarios and eliminate all but one.
Benefits of Test Automation for CI/CD Pipeline
With continuous QA in CI/CD, the project development cycle can enjoy the following benefits:
- Faster assessment of minor changes as the automated pipeline can easily and effectively integrate these and deliver continuous changes after it has been tested thoroughly.
- Automation allows for faster speed and minimal delays. Thus, the results of regression tests generate feedback quickly, which decreases the execution time.
- In addition to running faster tests and getting quicker feedback, automated QA allows parallel testing with cross-browser capabilities.
- The CI/CD pipeline and QA automation therein deliver quick and reliable results with almost no room for variations or anomalies.
- Since most of the reconfiguration in the CI/CD pipeline can be automated, there is a wide scope for scalability, especially in the long run.
Automation testing in CI/CD pipeline ensures test reliability and ultimately, fault isolation. It brings in consistent results and enhances the quality of the project. Not only does automation testing in CI/CD pipeline facilitate in-depth testing, but also ensures that everyone at the table, and not just the QAt team, is a stakeholder when it comes to the quality of the product.
To ensure effectiveness, it is important to choose the right tools for continuous automation testing in the CI/CD pipeline. Maruti Techlabs incorporates testing services seamlessly in your CI/CD pipeline to streamline and get the most out of your development cycles.
In a nutshell, the formula is simple, Continuous Integration + Continuous Delivery + Continuous Testing + Continuous Deployment + Continuous Feedback = Continuous Improvement!