[Gradle] Test that extra jvm compilation can be created with java enabled

^KT-41506 Verification Pending

libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/regressionTests/KT41506WithJavaSourceSet.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2023 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.regressionTests
+
+import org.jetbrains.kotlin.gradle.dsl.multiplatformExtension
+import org.jetbrains.kotlin.gradle.plugin.mpp.javaSourceSets
+import org.jetbrains.kotlin.gradle.targets.jvm.KotlinJvmTarget
+import org.jetbrains.kotlin.gradle.util.buildProjectWithMPP
+import org.jetbrains.kotlin.gradle.util.kotlin
+import kotlin.test.Test
+import kotlin.test.fail
+
+class KT41506WithJavaSourceSet {
+    @Test
+    fun `test that arbitrary compilation can be created with java enabled in Multiplatform project`() {
+        val project = buildProjectWithMPP {
+            kotlin {
+                jvm {
+                    compilations.create("integrationTest")
+                    withJava()
+                    //compilations.create("integrationTest")
+                }
+            }
+        }
+        project.evaluate()
+
+        val jvmTarget = project.multiplatformExtension.targets.getByName("jvm") as KotlinJvmTarget
+        if ("integrationTest" !in jvmTarget.compilations.names) {
+            fail("Expected jvm compilation 'integrationTest' is not found")
+        }
+
+        if ("jvmIntegrationTest" !in project.multiplatformExtension.sourceSets.names) {
+            fail("Expected kotlin source set 'jvmIntegrationTest' id not found")
+        }
+
+        if ("integrationTest" !in project.javaSourceSets.names) {
+            fail("Expected java source set 'integrationTest' id not found")
+        }
+    }
+}