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kotlinlang

Recently I saw a <https://blog.jetbrains.com/kotlin/2021/04/kotlin-1-5-0-rc-released/|post> for Kotlin 1.5.0 and I decided to use `assertIs` method in whole instance checks in my tests, and I replaced many of
`assertTrue { it is SomeClass }` with `assertIs&lt;SomeClass&gt;(it)`

Now, I am checking my coverage and it decreased, all the `assertIs` methods seems partially covered

Is it expected? are they really partially covered ?

Depending on your code coverage checker, it may be treated like a branch, where you have 2 things to cover: the case where the parameter is the asserted type, and the case where it isn't.

Yes and isn’t it something to be covered where the implementation of `assertIs` is ? This is a method from kotlin standard library

This is a result of inlining, JaCoCo doesn't know that this code wasn't written by you.