Shift-left is a methodology for detecting and preventing problems early in the software development cycle. A project can reduce the number of problems and improve the quality of the code by testing early and often. Shifting left does not bring testing closer to the start of a release cycle. It strews it liberally across each phase and iteration. The ultimate goal is to avoid finding any critical defects that require code patching during the deployment phase.
Shift-left testing is made possible by unit and API testing, and then they are eventually integrated using integration tools or end-to-end testing. Test automation tools such as Postman and TestProject can help QA automation engineers with this technique.
What is the difference between Shift-left and Shift-right API testing practices?
In simple, shift-left can be referred to as pre-production testing and shift-right can be referred to as post-production testing.
Testing will be done on a fully created and functional application in this shift-right practice method to ensure performance and usability qualities. Reviews and input from specific users also aid in improving the software’s quality. Testing is done earlier in the process with the shift-left practice approach, and it is done more frequently and in smaller units. In smaller unit checks, the team collects input on the product. As a result, the focus is on preventing problems rather than detecting them.
Benefits of Shift-left API testing
- As the shift-left increases the potential to automate testing, human errors will be decreased.
- As soon as the error is notified, it can be corrected.
- Defects can be discovered early in the QA stage before the product is shipped to the client.
- With the switch to small-sized unit tests, you can quickly develop traceability matrices based on test coverage.
- Clear coverage reports may be created and tracked to see how well each feature is being tested.
- Software that is delivered efficiently with minimal faults.
Types of shift-left in API testing
There are four basic ways to shift-left testing.
Traditional shift-left testing: The traditional shift-left shifts the testing emphasis to the right side of the original V model.
Incremental shift-left testing: When constructing large, sophisticated systems, especially ones containing significant quantities of hardware, incremental shift-left testing is popular. The forms of testing in the large waterfall V model are shifted left to become increments of the smaller incremental V models’ corresponding types of testing.
Agile/DevOps shift-left testing: Instead of a single or limited number of Vs as in the preceding two examples of shift-left testing, Agile and DevOps projects contain several short-duration Vs.
Model-based shift-left testing: By testing requirements, architecture, and design models, model-based testing shifts testing to the left side of the Vs. Instead of waiting a long, medium, or short time for the program to become available to the right side of the Vs, this shift begins testing practically immediately.
Steps for getting started with Shift-left testing
- Before beginning the real development process, identify and plan the complete testing lifecycle.
- Integrate testing into all development, project management, and operations processes.
- Define expected quality standards and implement quality controls at various levels of the SDLC.
- While on the Shift Left testing journey, plan departmental releases ahead of time.
- Developing test cases and frameworks that cover a broad range of functional and operational procedures.
- Participating in test automation will assist developers and testers in automating the entire build-to-test process throughout the SDLC.
- It’s also critical to encourage all developers to begin the development process with testability in mind; each developer should be held accountable for the quality of the code produced, bridging the gap between developers and testers and speeding up the testing process.
- Define a continuous feedback mechanism so that testers can provide developers with feedback both during and after the development stage.
- Testers must learn to code since, when it comes to sprint testing, knowing how to code can aid with a deeper examination of the flaws.
- Conduct official audits and inspections on a regular basis. Periodic reviews allow testers to focus on quality rather than defect detection, saving time.