Is 100 percent code coverage possible?

It’s almost impossible to get 100\% code coverage for any significant body of code. Covering every branch, every piece of error handling code, and every piece of UI code is extremely difficult. (I say “almost impossible” because SQLite has done it. SQLite has 711 times as much test code as it has production code.)

Why is there no 100 percent test coverage?

One hundred percent unit test coverage doesn’t say anything about missing code, missing error handling, or missing requirements. Tests also might not actually check the functionality of the code. Merely executing the code without checking its functionality still counts in the coverage metrics.

Does a test with 100 code coverage guarantee code quality?

Although 100\% code coverage may appear like a best possible effort, even 100\% code coverage is estimated to only expose about half the faults in a system. Low code coverage indicates inadequate testing, but high code coverage guarantees nothing.

Is code coverage a good metric?

Code coverage is a metric that can help you understand how much of your source is tested. It’s a very useful metric that can help you assess the quality of your test suite, and we will see here how you can get started with your projects.

How do I make sure 100 test coverage?

How Do You Ensure Test Coverage Is Good?

1. Create a comprehensive testing strategy.
2. Create a checklist for all of the testing activities.
3. Prioritize critical areas of the application.
4. Create a list of all requirements for the application.
5. Write down the risks inherent to the application.
6. Leverage test automation.

Do I need code coverage?

Code coverage provides critical information to show teams where to focus their testing. Regardless of the testing process used, code coverage can provide insight and focus to help teams improve their testing. Just as important, code coverage can help developers improve their tests before they commit to a build.

How do you ensure 100 test coverage?

Why is measurement of code coverage important?

The purpose of code coverage testing is to figure out how much code is being tested. Code coverage tool generate a report which shows how much of the application code has been run. Code coverage is measured as a percentage, the closer to 100\%, the better.

Why test coverage is a bad metric?

This is where metrics come into play. Test coverage does not assure high-quality code any more than the quality of a movie is assured by how much money it makes. In both cases, the given metrics are indicators only, and used by the powers that be to make decisions. The true value of code coverage is as an indicator.

Is code coverage necessary?

How many cases are needed for 100 Decision Coverage?

4 test cases are required for 100\% decision coverage.