Wrong code coverage percentage when we have Preview function in our class

[ItSNeverLate]

Describe the bug
I can not exclue my functions which were annotated by @Preview (androidx.compose.desktop.ui.tooling.preview.Preview) in my KMP project.

@Preview
@composable
@KoverIgnore
private fun Preview() {
AppTheme {

.........

kover {
reports {
verify {
rule {
minBound(80) //80% minimum coverage
}
}
filters {
excludes {
// Entire Points
classes("MainKt") // Desktop
classes("*.MainActivity") // Android

            // Generated Classes and Resources
            classes("*.generated.*")

            // Dependency Injection
            classes("*.di.*")

            // Compose Related (UI)
             classes("*ComposableSingletons*")
            annotatedBy(
                "androidx.compose.desktop.ui.tooling.preview.Preview",
                "KoverIgnore"
            )
        }
    }
}

}

Environment

• Kover Gradle Plugin version: 0.9.1
• Gradle version: 8.10.2
• Kotlin project type: Multiplatform
• Coverage Toolset: Kover

[shanshin]

Hi, please provide the list of classes above Preview function

[ItSNeverLate]

sorry: my problem is i have a class with two functions. and preview function is ignored and it is not listed in the class functions anymore. but the class code coverage is still 50%

[ItSNeverLate]

I am using this to be able to see my compose preview in android studio

@OptIn(ExperimentalMultiplatform::class)
@OptionalExpectation
@target(AnnotationTarget.FUNCTION)
expect annotation class Preview()

[ItSNeverLate]

without
annotatedBy( "androidx.compose.desktop.ui.tooling.preview.Preview",
I could see preview function in the report is listed.

It means that kover ignores my function based on my configuration. But why it is counting that in class function count? (the result is 50%)

[johngray1965]

I'm see this too. I have annotatedBy("androidx.compose.desktop.ui.tooling.preview.Preview") in the config, sometimes they are correctly ignored, sometimes partially ignore, sometimes not ignored at all. In some cases, I'd have excellent coverage if it weren't for this.

[johngray1965]

Here's a good example.

[ItSNeverLate]

@johngray1965 exactly, it says that the class is 100% covered. But 50% of the methods. It means it considers Preview function.

[johngray1965]

There seems to be some pattern of when it's working and when its not, but I haven't been able to see it just yet.

[johngray1965]

Interesting. With my Empty example above, if I have two previews function each with a single @Preview annotation, instead of single preview function with two @Preview annotations, they are correctly ignored.

[johngray1965]

@shanshin Yeah, that's repeatable. Multiple @Preview annotations cause issues. I'm fairly sure other annotations, like @Suppress cause issues as well.