How do you add code coverage?

How do you add code coverage?

Here’s how to enable code coverage for your app:

1. In Xcode, from the Product menu, choose Scheme → Edit Scheme.
2. Select the Test tab in the left column.
3. Toggle on the Gather coverage for checkbox, and specify which targets should report code coverage with the select box to the right of the checkbox.

What is used for code coverage?

Code coverage tools will use one or more criteria to determine how your code was exercised or not during the execution of your test suite. Function coverage: how many of the functions defined have been called. Statement coverage: how many of the statements in the program have been executed.

What happens if your code coverage is 100%?

The test will succeed, and your code coverage is 100%. However, if you add another test: then you will get a NullPointerException. And as you were at 100% with the first test, you would have not necessarily write the second one!

Do you have to have 100% coverage in unit testing?

Not primarily because you have thoroughly tested code (although that is definitely a benefit), but more in terms of writing simple code that is easy to test and reason about. If you know you have to have 100% test coverage, you stop writing overly complex if/else/while/try/catch monstrosities and Keep It Simple Stupid.

Do you have 100% coverage in Ruby?

Ruby is very “mockable” in that you can stub/mock out large chunks of your code without having to build in overly complicated class composition and construction designs that you would have to do in other languages. That said, we only have 100% line coverage (basically what rcov gives you).

Is it possible to get 100% line coverage?

You can get 100% line coverage, but as others have pointed out here on SO and elsewhere on the internet its maybe only a minimum. When you consider path and branch coverage, there’s a lot more work to do. The other way of looking at it is to try to make your code so simple that its easy to get 100% line coverage.