[Gradle] Added tests for accessing target's publishable property

^KT-81134

Author: AYastrebov

libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/CrossCompilationPublishingTests.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010-2025 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+@file:Suppress("FunctionName")
+
+package org.jetbrains.kotlin.gradle.unitTests
+
+import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
+import org.jetbrains.kotlin.gradle.dsl.multiplatformExtension
+import org.jetbrains.kotlin.gradle.util.buildProjectWithMPP
+import org.jetbrains.kotlin.gradle.util.kotlin
+import org.junit.Test
+
+class CrossCompilationPublishingTests {
+
+    @Test
+    fun `test KT-81134 Gradle configuration failure when accessing publishable property`() {
+        with(buildProjectWithMPP {
+            kotlin {
+                macosX64()
+                linuxX64()
+                mingwX64()
+            }
+        }) {
+            multiplatformExtension.targets.withType(KotlinNativeTarget::class.java).configureEach { nativeTarget ->
+                nativeTarget.publishable
+            }
+
+            evaluate()
+        }
+    }
+}