Class name is marked as 'not covered' while running code coverage in Android Studio

Question

I have tried AndroidStudio's code coverage feature and I have met a strange issue:

It is marks the tested class's name as 'not covered' code. How is that possible? Is that a bug?

Picture here:

As you can see it has one method with 4 lines and each one of them is covered. So why is the red line at the class's name?

Tetragrammaton

Answer 1

You are using a static method, so the class itself is never created as an object, therefore never testing that ability.

Christology

Well okay, and how does one tests a static method with coverage? – Tetragrammaton

#9700679 like this – Christology

Answer 2

I tried the lombok @UtilityClass, it helped to ignore the class name and code coverage was improved to be 100%.

Chamaeleon

Answer 3

Since also a class with a static function has a default no-argument constructor, your code coverage tool will complain. A good way to solve this, is by adding a private constructor.

private EmailValidator() {
}

Beowulf