Thursday, 3 December 2020

Test Coverage and Code Coverage in Software Testing|

 

Today, Many QA engineers talk a lot about “test coverage,” which gives a good overview of the quality of the product. However, to achieve real quality, both code coverage and test coverage analysis must be considered. For example, even if you reach 100 percent test coverage, you still need to aim for at least 90 percent function code coverage to ensure the best results.

 

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t coverage is often confused with the Code Coverage. Although both of the metrics are used to evaluate the quality of the application code, code coverage is a term to describe what % of the application code used when a user interacts with an application. On the other hand, Test Coverage is testing each business requirement at least once and is a QA team activity.

 

How to attain more Test Coverage in less time

Testers always run on a tight schedule and have to focus on ensuring maximum coverage within the specified time primarily. There are a few methods described below to achieve this –

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Using Automation Tools

One of the modern software testing methods that any company or testing group can adopt is the use of the right Automation Tool. There is the number of tools on the market today to make life easy for testers.

 


Maintain Proper Checklist

Maintaining a correct checklist for each communication under the given module can help to achieve efficient task coverage.

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Prioritizing Requirements

Prioritizing requirements is one thing that is necessary to achieve maximum test coverage in less time. Sort out the given requirements into Simple, Medium, and Complex priorities that allow testers to focus vigorously on their tasks. More focus should be on the new LIVE requirements in the next release.

 

Impact Analysis

Identifying impacts in the initial builds and consequently increasing the need for elimination of these impacts can help to achieve high coverage in the upcoming builds.

 

Build Management

The test manager should keep track of all impacts and fixes in the current build and ensure QA receive clean build with efficient repairs.

 

Test Coverage Metrics

Code coverage = (No. of lines of code exercised by the test suites)/(total no. of lines of code)*100

Requirement coverage = [(Total no. of requirements) – (Total no. of missed requirements)]/(Total no. of requirements)*100

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Test Coverage Best Practices

Sort business requirements/modules according to their criticality, frequency of use and most complex workflows.

Develop a traceability matrix for the modules/requirements.

Use test coverage as a measure for “untested paths” instead of “false sense of security.”

Develop automated suites using the frameworks integrated with code coverage utilities.

Measure code coverage for each release and plan to improve it with every subsequent release.

Utilize the metrics like ‘Defect density,’ ‘feature wise defect distribution’ and ‘Defect removal efficiency’ as a guide to ensure the improved coverage for the subsequent releases.

 

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Key benefits of Testing Coverage awareness for a Tester

Primarily helps to prioritize with the testing task.

Helps to achieve 100% requirement coverage.

Useful in determining the EXIT criteria.

Impacts Analysis becomes easier.

A test lead can also prepare a clear test closure report.

Concluding Test and Code Coverage

Test coverage does not end with the above contexts.

 

It’s not always true that when you test more, the results are better. When you check more with no planned strategy, you probably will end up investing a lot of time.

 

With a more structured approach, a 100% requirement coverage and effective testing methods, you will not compromise the quality of the product.

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