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How do you test and debug large software systems without wasting time?

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Testing and debugging large software systems can be a daunting and time-consuming task, especially when you have to deal with complex dependencies, legacy code, and changing requirements. However, there are some strategies and best practices that can help you streamline your testing and debugging process and avoid wasting time on unnecessary or ineffective steps. In this article, we will discuss some of these strategies and how to apply them to your system development projects.

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Francis B.

Principal Software Engineer

1 Choose the right testing tools

One of the first things you should do is to choose the right testing tools for your system. Depending on the type, size, and scope of your system, you may need different tools for different levels of testing, such as unit testing, integration testing, system testing, and acceptance testing. You should also consider the compatibility, usability, and scalability of the tools, as well as the support and documentation available. Some examples of popular testing tools are JUnit, Selenium, TestNG, and Cucumber.

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Francis B.

Principal Software Engineer
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While all of the answers presented are correct, what they are saying, in part, is follow an SDLC. These large integration/operations issues usually arise from lack of complete understanding of the application. What I mean is many head scratching issues appearing out of nowhere. Regardless, of all the arguments against a strict process like CMMI or ASPICE etc., requirements based design/development and testing to requirements assures: 1. the code is completely verified 2. test development derives a deep understanding of the application. 3. assured signoff, due to verification of all accepted validated requirements.

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2 Use automated testing

Automated testing is a technique that uses software tools to execute predefined tests and compare the actual results with the expected results. Automated testing can save you a lot of time and effort, as well as improve the accuracy, consistency, and coverage of your testing. You can use automated testing for various purposes, such as regression testing, performance testing, load testing, and security testing. However, automated testing is not a substitute for manual testing, and you should still perform some manual testing to check for usability, functionality, and user experience.

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3 Implement code reviews

Code reviews are a process of examining and evaluating the source code of a system by other developers or peers. Code reviews can help you detect and fix bugs, improve code quality, enforce coding standards, and share knowledge and feedback. Code reviews can be done in different ways, such as pair programming, pull requests, or formal inspections. You should conduct code reviews regularly and systematically, and use tools such as GitHub, CodeGuru, or SonarQube to facilitate and automate the process.

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4 Debug systematically

Debugging can be a difficult and tedious task, especially when dealing with large and complex systems. To make it easier and faster, it is important to follow a systematic approach. Firstly, you should try to reproduce the error in a controlled environment and identify the input, output, and expected behavior. Then, use debugging tools such as breakpoints, logs, or debuggers to trace the execution flow and locate the source of the error. After that, modify the code or configuration to correct the error and verify the changes. Lastly, run tests again to ensure that the error is resolved and no new errors are introduced.

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5 Learn from mistakes

The last but not least strategy is to learn from your mistakes and avoid repeating them. Testing and debugging are not only about finding and fixing errors, but also about improving your skills, knowledge, and practices. You should document and analyze the errors you encounter, and use them as opportunities to learn and improve. You should also share your findings and solutions with your team or community, and seek feedback and advice. By doing so, you can prevent future errors, enhance your system quality, and reduce your testing and debugging time.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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John Wigton

Principal Software Engineer at General Dynamics Mission Systems
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Develop and maintain dependency data of component linkages and which components each test exercises. When just a few modules are altered, this helps determine which tests need to be run when performing regression tests after new code has been integrated.

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How do you test and debug large software systems without wasting time?

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3

4

5

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1 Choose the right testing tools

2 Use automated testing

3 Implement code reviews

4 Debug systematically

5 Learn from mistakes

6 Here’s what else to consider

System Development

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How do you test and debug large software systems without wasting time?

1

2

3

4

5

6

1 Choose the right testing tools

2 Use automated testing

3 Implement code reviews

4 Debug systematically

5 Learn from mistakes

6 Here’s what else to consider

System Development

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