Enable JDK 8 level in some tests for correct convert for method references

j2k/testData/fileOrElement/function/java8MRSamConstructor.kt

@@ -51,8 +51,8 @@ internal class Java8Class {
     fun testMemberFunctionThroughClass() {
         val memberFunFromClass = JFunction2<Java8Class, Int> { it.memberFun() }
         memberFunFromClass.foo(Java8Class())
-        MethodReferenceHelperClass.staticFun2(JFunction2<Any, Any> { memberFun() })
-        h.memberFun2(JFunction2<Any, Any> { memberFun() })
+        MethodReferenceHelperClass.staticFun2(JFunction2<Java8Class, Int> { it.memberFun() })
+        h.memberFun2(JFunction2<Java8Class, Int> { it.memberFun() })
     }
 
     fun testMemberFunctionThroughObject() {

j2k/tests/org/jetbrains/kotlin/j2k/AbstractJavaToKotlinConverterTest.kt

@@ -16,9 +16,11 @@
 
 package org.jetbrains.kotlin.j2k
 
+import com.intellij.openapi.roots.LanguageLevelProjectExtension
 import com.intellij.openapi.util.io.FileUtil
 import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.openapi.vfs.newvfs.impl.VfsRootAccess
+import com.intellij.pom.java.LanguageLevel
 import com.intellij.testFramework.LightPlatformTestCase
 import com.intellij.testFramework.fixtures.LightCodeInsightFixtureTestCase
 import org.jetbrains.kotlin.idea.test.invalidateLibraryCache
@@ -30,6 +32,11 @@ abstract class AbstractJavaToKotlinConverterTest : LightCodeInsightFixtureTestCa
     override fun setUp() {
         super.setUp()
 
+        val testName = getTestName(false)
+        if (testName.contains("Java8") || testName.contains("java8")) {
+            LanguageLevelProjectExtension.getInstance(project).languageLevel = LanguageLevel.JDK_1_8
+        }
+
         VfsRootAccess.allowRootAccess(KotlinTestUtils.getHomeDirectory())
 
         invalidateLibraryCache(project)