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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ import io.gitlab.arturbosch.detekt.api.config
import io.gitlab.arturbosch.detekt.rules.identifierName
import io.gitlab.arturbosch.detekt.rules.isConstant
import org.jetbrains.kotlin.psi.KtProperty
import org.jetbrains.kotlin.psi.psiUtil.isExtensionDeclaration
import org.jetbrains.kotlin.psi.psiUtil.isPrivate

/**
Expand All @@ -32,7 +33,8 @@ class TopLevelPropertyNaming(config: Config) : Rule(

override fun visitProperty(property: KtProperty) {
super.visitProperty(property)
if (!property.isTopLevel) return
if (!property.isTopLevel || property.psiOrParent.isExtensionDeclaration()) return

if (property.isConstant()) {
handleConstant(property)
} else {
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,15 @@ class TopLevelPropertyNamingSpec {
}
}

@Test
fun `should not report on top level extension properties`() {
val code = """
val String._foo = "foo"
""".trimIndent()

assertThat(subject.lint(code)).isEmpty()
}

@Nested
inner class `variables on top level` {

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