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What is the difference between mutation testing and code coverage?

An example of an AI chatbot conversation about mutation testing vs code coverage.

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You

What is the difference between mutation testing and code coverage?

MagicBuddy
MagicBuddy

Mutation testing evaluates the effectiveness of your tests by introducing small changes (mutations) to the code. Code coverage, on the other hand, measures how much of your code is executed during tests.

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You

Which one is more effective for ensuring code quality?

MagicBuddy
MagicBuddy

Mutation testing is generally considered more effective because it assesses the quality of your tests, not just the quantity of code covered. However, it can be more time-consuming.

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You

Can you give me an example of mutation testing?

MagicBuddy
MagicBuddy

Sure! If you have a function that adds two numbers, a mutation might change the addition operator to a subtraction operator. If your tests fail, it means they effectively catch the error.

😀
You

How can I implement mutation testing in my project?

MagicBuddy
MagicBuddy

You can use tools like Stryker for JavaScript or PIT for Java. These tools automate the mutation testing process and integrate with your existing test suite.

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