Code coverage is a software testing method used for data mining. It measures the number of lines of code that are successfully validated under a test procedure that helps in analyzing how comprehensively a software is verified.
Enterprise graded software is the ultimate goal
Developing enterprise-grade software is the ultimate goal of any software company. Nevertheless, to accomplish this goal, companies need to ensure that the software that they develop meets all essential quality characteristics and maintainability. This is only possible by reviewing the software product quality.
Along with handing off the software to QA engineers for bug tracking, it is easy to analyze, monitor, and measure test activities to stop them. This indicates that software testing metrics should be used for evaluating the test suite's effectiveness and completeness. Code coverage is one such software testing metric that helps in accessing the test performance and quality aspects of any software.
Top 3 benefits of code coverage
Before listing down the benefits, let's bus for a few minutes. Code coverage analysis can only be used for the validation of test cases that run on the source code and not for the evaluation of the software product. Below are the top three benefits of code coverage:
Easy maintenance of codebase
It is essential to write scalable code for extending the software program by new or modified functionalities. Nevertheless, it is always difficult to determine whether the written code is scalable or not.
Exposure of bad code
Continuous testing will allow developers to understand bad, dead, and unused code. Then testers will be capable of enhancing their coding practices that will result in better maintainability of the product.
Faster time to market
With the help of this metric, developers can finish the software development process much faster by increasing their productivity and efficiency.
Some best practices for code coverage
If we talk about code coverage tools in any large group of people, endless arguments could ensue. As people bunker comfortably in their separate camps, this will generally take the debate away from meaningful development.
The main purpose is to offer developers tools for steering on all ends of the spectrum for finding common ground so that they can move forward and use code coverage information pragmatically. Below are some best practices in the domain of code coverage for working effectively with code health.
The development process benefits significantly from code coverage. It's not a perfect metric for testing quality, but it's a realistic, objective, and industry-standard statistic that provides extremely actionable data. It doesn't require any significant human interaction as it applies universally to all products and there are sufficient tools available in the industry for most languages.
The whole process can be a bit unclear
Although it is unclear if code coverage alone decreases defects, recent experiences have demonstrated that attempts to improve code coverage have resulted in long-term cultural improvements in engineering quality.
Anything isn't guaranteed by high code coverage. If developers focus on getting the number close to 100%, it will lead to a false sense of security. It can be inefficient, wasting machine cycles and accumulating technical debt from low-value tests that should be kept up to date.
On every release, the Unlock code coverage number ensures that huge parts of the product will be completed and automated. It will increase our risk of publishing bad code in production, so it should receive attention. A lot of value in the code coverage data is highlighting what is covered but what is not covered.
Code coverage can be different for different brands
Code coverage for diverse products is generally poor, and testers should strive to increase code coverage tools across the board. Despite the fact that there is no optimum code coverage level, Google considers 60% acceptable, 75% excellent, and 90% exceptional. Testers prefer to avoid broad top-down directives in favor of allowing each team to choose the value that best fits their needs.
Testers shouldn't be obsessing about how to get 90% code coverage to 95%. The advantages of expanding python code coverage beyond a certain point are logarithmic. But testers should always take precise steps to move from 30% to 70% and always make sure that the new code meets the client’s desired threshold.
Essentially, the percentage of lines in the code in human judgment over the actual lines of code that won't be covered and whether this risk is acceptable or not. What isn't covered is considered to be more meaningful than what is covered. Some discussions over specific lines of code won't be covered. They take place during the code review process and are more valuable than over-indexing an arbitrary target number.
How to check the covered changing codes?
Make sure you've covered all of the changing codes. Per commit coverage objectives of 99 % are appropriate, and 90 % is a suitable lower boundary, as project white targets over 90 % are unlikely to be worthwhile. We must make certain that our testing does not deteriorate with time. Unit-test code coverage is only considered as a piece of the puzzle.
Integration is critical for system test code coverage, and having a holistic view of the coverage of all sources in the unit and integration testing pipeline is critical. It will show you a bigger picture of how much your code isn't exercised by test automation as it will make its way into a pipeline into the production environment.
So, it was all about code coverage. Developers and testers should intensify the speed of the software development life cycles in this fast-paced, technology-driven world. And for handling tight deadlines, software engineers should focus on building only good code.
Hence, good code quality is anything that a developer or tester is aiming for. They will be able to track the proportion of code that functioned successfully under test scenarios using the python code coverage analysis report. This information will be used as a feedback report to assist developers in writing good, clean source code. This ultimately results in improved code quality and will positively impact software quality.