[Tests] FIR support in JUnit 3 tests, port necessary subclasses

^KT-64404 Fixed
^KT-64438 Fixed
^KT-64407 Fixed

compiler/tests-common/tests/org/jetbrains/kotlin/test/KotlinBaseTest.kt

@@ -9,11 +9,12 @@ import org.jetbrains.kotlin.checkers.ENABLE_JVM_PREVIEW
 import org.jetbrains.kotlin.checkers.parseLanguageVersionSettings
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
 import org.jetbrains.kotlin.config.*
+import org.jetbrains.kotlin.test.testFramework.FrontendBackendConfiguration
 import org.jetbrains.kotlin.test.testFramework.KtUsefulTestCase
 import org.jetbrains.kotlin.test.util.KtTestUtil
 import java.io.File
 
-abstract class KotlinBaseTest<F : KotlinBaseTest.TestFile> : KtUsefulTestCase() {
+abstract class KotlinBaseTest<F : KotlinBaseTest.TestFile> : KtUsefulTestCase(), FrontendBackendConfiguration {
     @Throws(Exception::class)
     override fun setUp() {
         super.setUp()
@@ -51,26 +52,25 @@ abstract class KotlinBaseTest<F : KotlinBaseTest.TestFile> : KtUsefulTestCase()
         return Companion.extractConfigurationKind(files)
     }
 
-    protected open fun updateConfiguration(configuration: CompilerConfiguration) {}
+    protected open fun updateConfiguration(configuration: CompilerConfiguration) {
+        configureIrFir(configuration)
+    }
 
     protected open fun setupEnvironment(environment: KotlinCoreEnvironment) {}
 
     protected open fun parseDirectivesPerFiles() = false
 
-    protected open val backend = TargetBackend.ANY
 
     protected open fun configureTestSpecific(configuration: CompilerConfiguration, testFiles: List<TestFile>) {}
 
     protected fun createConfiguration(
         kind: ConfigurationKind,
         jdkKind: TestJdkKind,
-        backend: TargetBackend,
         classpath: List<File?>,
         javaSource: List<File?>,
         testFilesWithConfigurationDirectives: List<TestFile>
     ): CompilerConfiguration {
         val configuration = KotlinTestUtils.newConfiguration(kind, jdkKind, classpath, javaSource)
-        configuration.put(JVMConfigurationKeys.IR, backend.isIR)
         updateConfigurationByDirectivesInTestFiles(
             testFilesWithConfigurationDirectives,
             configuration,

compiler/tests-common/tests/org/jetbrains/kotlin/test/testFramework/FrontendBackendConfiguration.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2024 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.
+ */
+
+package org.jetbrains.kotlin.test.testFramework
+
+import org.jetbrains.kotlin.config.CommonConfigurationKeys
+import org.jetbrains.kotlin.config.CompilerConfiguration
+import org.jetbrains.kotlin.config.JVMConfigurationKeys
+import org.jetbrains.kotlin.test.FirParser
+import org.jetbrains.kotlin.test.TargetBackend
+
+interface FrontendBackendConfiguration {
+    val useFir: Boolean
+        get() = false
+    val firParser: FirParser
+        get() = FirParser.Psi
+    val backend
+        get() = TargetBackend.ANY
+
+    fun configureIrFir(configuration: CompilerConfiguration) {
+        configuration.put(JVMConfigurationKeys.IR, backend.isIR)
+        configuration.put(CommonConfigurationKeys.USE_FIR, useFir)
+        when (firParser) {
+            FirParser.LightTree -> configuration.put(CommonConfigurationKeys.USE_LIGHT_TREE, true)
+            FirParser.Psi -> {}
+        }
+    }
+}