Add JvmTargetXOnJvm15 test suites

compiler/tests-different-jdk/build.gradle.kts

@@ -82,6 +82,19 @@ codegenTest(target = 8, jvm = 11) {}
 
 codegenTest(target = 11, jvm = 11) {}
 
+//JDK 15
+codegenTest(target = 6, jvm = 15) {
+    jvmArgs!!.add( "-XX:-FailOverToOldVerifier")
+}
+
+codegenTest(target = 8, jvm = 15) {
+    jvmArgs!!.add( "-XX:-FailOverToOldVerifier")
+}
+
+codegenTest(target = 15, jvm = 15) {
+    jvmArgs!!.add( "-XX:-FailOverToOldVerifier")
+}
+
 //..also add this two tasks to build after adding fresh jdks to build agents
 val mostRecentJdk = JdkMajorVersion.values().last().name
 

compiler/tests-different-jdk/tests/org/jetbrains/kotlin/codegen/jdk/CustomJvmTargetOnJvmBaseTest.kt

@@ -31,17 +31,20 @@ import org.junit.runner.RunWith
 @UseTechnicalNames
 abstract class CustomJvmTargetOnJvmBaseTest
 
+// JDK 6
 @RunOnlyJdk6Test
 @Execution(ExecutionMode.SAME_THREAD)
 @RunWith(JUnitPlatformRunnerForJdk6::class)
 class JvmTarget6OnJvm6 : CustomJvmTargetOnJvmBaseTest()
 
+// JDK 8
 @RunWith(JUnitPlatform::class)
 class JvmTarget6OnJvm8 : CustomJvmTargetOnJvmBaseTest()
 
 @RunWith(JUnitPlatform::class)
 class JvmTarget8OnJvm8 : CustomJvmTargetOnJvmBaseTest()
 
+// JDK 11
 @RunWith(JUnitPlatform::class)
 class JvmTarget6OnJvm11 : CustomJvmTargetOnJvmBaseTest()
 
@@ -51,6 +54,17 @@ class JvmTarget8OnJvm11 : CustomJvmTargetOnJvmBaseTest()
 @RunWith(JUnitPlatform::class)
 class JvmTarget11OnJvm11 : CustomJvmTargetOnJvmBaseTest()
 
+// JDK 15
+@RunWith(JUnitPlatform::class)
+class JvmTarget6OnJvm15 : CustomJvmTargetOnJvmBaseTest()
+
+@RunWith(JUnitPlatform::class)
+class JvmTarget8OnJvm15 : CustomJvmTargetOnJvmBaseTest()
+
+@RunWith(JUnitPlatform::class)
+class JvmTarget15OnJvm15 : CustomJvmTargetOnJvmBaseTest()
+
+// LAST JDK from JdkMajorVersion available on machine
 @RunWith(JUnitPlatform::class)
 class JvmTarget6OnJvmLast : CustomJvmTargetOnJvmBaseTest()
 
@@ -59,14 +73,3 @@ class JvmTarget8OnJvmLast : CustomJvmTargetOnJvmBaseTest()
 
 @RunWith(JUnitPlatform::class)
 class JvmTargetLastOnJvmLast : CustomJvmTargetOnJvmBaseTest()
-
-//TODO: delete old tasks
-@RunWith(JUnitPlatform::class)
-class JvmTarget6OnJvm9 : CustomJvmTargetOnJvmBaseTest()
-
-@RunWith(JUnitPlatform::class)
-class JvmTarget8OnJvm9 : CustomJvmTargetOnJvmBaseTest()
-
-@RunWith(JUnitPlatform::class)
-class JvmTarget9OnJvm9 : CustomJvmTargetOnJvmBaseTest()
-