Introduce FIR_IDENTICAL for FIR vs old frontend tests #KT-36879 Fixed

compiler/testData/diagnostics/tests/override/clashesOnInheritance/flexibleReturnType.fir.kt

@@ -1,27 +0,0 @@
-// FILE: J.java
-public interface J {
-    String foo(); // String!
-}
-
-// FILE: K.kt
-interface K1 {
-    fun foo(): String
-}
-
-interface K2 {
-    fun foo(): String?
-}
-
-interface KDerived1a : K1, J
-
-interface KDerived1b : J, K1
-
-interface KDerived2a : K2, J
-
-interface KDerived2b : J, K2
-
-interface KDerived12a : K1, K2, J
-
-interface KDerived12b : K1, J, K2
-
-interface KDerived12c : J, K1, K2

compiler/testData/diagnostics/tests/override/clashesOnInheritance/flexibleReturnType.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // FILE: J.java
 public interface J {
     String foo(); // String!

compiler/testData/diagnostics/tests/override/clashesOnInheritance/flexibleReturnTypeIn.fir.kt

@@ -1,61 +0,0 @@
-// FILE: InOut.kt
-interface In<in T>
-
-// FILE: J1.java
-public interface J1 {
-    In<String> foo();
-}
-
-// FILE: J2.java
-import org.jetbrains.annotations.*;
-
-public interface J2 {
-    @NotNull In<String> foo();
-}
-
-// FILE: J3.java
-import org.jetbrains.annotations.*;
-
-public interface J3 {
-    @Nullable In<String> foo();
-}
-
-// FILE: K.kt
-interface K1 {
-    fun foo(): In<String>
-}
-
-interface K2 {
-    fun foo(): In<String?>
-}
-
-// FIXME TestJ1K1 should have foo(): In<String!>, since In<String!> <: In<String>.
-interface TestJ1K1 : J1, K1
-interface TestK1J1 : K1, J1
-
-interface TestJ1K2 : J1, K2
-interface TestK2J1 : K2, J1
-
-interface TestJ2K1 : J2, K1
-interface TestK1J2 : K1, J2
-
-interface TestJ2K2 : J2, K2
-interface TestK2J2 : K2, J2
-
-interface TestJ3K1 : J3, K1
-interface TestK1J3 : K1, J3
-
-interface TestJ3K2 : J3, K2
-interface TestK2J3 : K2, J3
-
-interface TestJ1K1K2 : J1, K1, K2
-interface TestK1J1K2 : K1, J1, K2
-interface TestK1K2J1 : K1, K2, J1
-
-interface TestJ2K1K2 : J2, K1, K2
-interface TestK1J2K2 : K1, J2, K2
-interface TestK1K2J2 : K1, K2, J2
-
-interface TestJ3K1K2 : J3, K1, K2
-interface TestK1J3K2 : K1, J3, K2
-interface TestK1K2J3 : K1, K2, J3

compiler/testData/diagnostics/tests/override/clashesOnInheritance/flexibleReturnTypeIn.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // FILE: InOut.kt
 interface In<in T>
 

compiler/testData/diagnostics/tests/override/clashesOnInheritance/genericWithUpperBound.fir.kt

@@ -1,56 +0,0 @@
-// FILE: JFooWithUpperBound.java
-public interface JFooWithUpperBound<T extends IBase> {
-    T foo();
-}
-
-// FILE: JFooWithUpperBoundDerived.java
-public interface JFooWithUpperBoundDerived<T extends IBase> extends JFooWithUpperBound<T> {
-}
-
-// FILE: JCFooWithUpperBound.java
-public class JCFooWithUpperBound<T extends IBase> {
-    public T foo() {
-        return null;
-    }
-}
-
-// FILE: JCFooWithUpperBoundDerived.java
-public class JCFooWithUpperBoundDerived<T extends IBase> extends JCFooWithUpperBound<T> {
-}
-
-// FILE: K.kt
-interface IBase
-
-interface IDerived : IBase
-
-interface IFooWithUpperBound<T : IBase> {
-    fun foo(): T
-}
-
-interface IFooT<T> {
-    fun foo(): T
-}
-
-interface IFoo {
-    fun foo(): IBase
-}
-
-interface IFooDerived : IFoo {
-    override fun foo(): IDerived
-}
-
-interface IFooWithUpperBoundDerived<T : IBase> : IFooWithUpperBound<T>
-
-interface Test1<T : IBase> : IFooWithUpperBound<T>, IFoo
-
-interface Test2<T : IBase> : IFooT<T>, IFoo
-
-interface Test3<T : IDerived> : IFooWithUpperBoundDerived<T>, IFooDerived
-
-interface Test4<T : IBase> : JFooWithUpperBound<T>, IFoo
-
-interface Test5<T : IDerived> : JFooWithUpperBoundDerived<T>, IFooDerived
-
-class Test6<T : IBase> : JCFooWithUpperBound<T>(), IFoo
-
-class Test7<T : IDerived> : JCFooWithUpperBoundDerived<T>(), IFooDerived

compiler/testData/diagnostics/tests/override/clashesOnInheritance/genericWithUpperBound.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // FILE: JFooWithUpperBound.java
 public interface JFooWithUpperBound<T extends IBase> {
     T foo();