[K/N][Tests] Adjust moved codegen tests to new infra

^KT-61259

native/native.tests/testData/codegen/funInterface/implIsNotFunction.kt

@@ -3,8 +3,6 @@
  * that can be found in the LICENSE file.
  */
 
-package codegen.funInterface.implIsNotFunction
-
 import kotlin.test.*
 
 fun interface Foo {
@@ -13,7 +11,7 @@ fun interface Foo {
 
 fun foo(f: Foo) = f is Function<*>
 
-@Test
-fun test() {
+fun box(): String {
     assertFalse(foo { "zzz" })
+    return "OK"
 }

native/native.tests/testData/codegen/funInterface/kt43887.kt

@@ -3,7 +3,6 @@
  * that can be found in the LICENSE file.
  */
 @file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
-package codegen.funInterface.kt43887
 
 import kotlin.test.*
 
@@ -27,12 +26,14 @@ inline fun CPointer<heap_t>?.free(ptr: CPointer<*>?): Boolean {
     return heap_free(this, ptr)?.pointed?.value ?: false
 }
 
-@Test
-fun runTest(): Unit = memScoped {
+fun box(): String {
+  memScoped {
     val heap = Heap(1024)
 
     heap.use<IntVar> { ptr ->
         ptr.pointed.value = 40
         //println("PTR ${ptr.pointed}")
     }
+  }
+  return "OK"
 }

native/native.tests/testData/codegen/funInterface/kt49384.kt

@@ -3,8 +3,6 @@
  * that can be found in the LICENSE file.
  */
 
-package codegen.funInterface.kt49384
-
 import kotlin.test.*
 
 interface A<T>
@@ -17,20 +15,9 @@ class B<T> {
     }
 }
 
-@Test
-fun test1() {
+fun box(): String {
     val b = B<Any>()
     assertEquals(b, b) // Just to ensure B is not deleted by DCE
-}
 
-fun interface Foo<T> {
-    fun same(obj: T): T
-}
-
-fun getSame(obj: A<out Any>, foo: Foo<A<out Any>>) = foo.same(obj)
-
-@Test
-fun test2() {
-    val obj = object : A<Any> {}
-    assertSame(obj, getSame(obj) { it })
+    return "OK"
 }

native/native.tests/testData/codegen/funInterface/kt49384_getSame.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+import kotlin.test.*
+
+interface A<T>
+
+// https://youtrack.jetbrains.com/issue/KT-49384
+fun interface Foo<T> {
+    fun same(obj: T): T
+}
+
+fun getSame(obj: A<out Any>, foo: Foo<A<out Any>>) = foo.same(obj)
+
+fun box(): String {
+    val obj = object : A<Any> {}
+    assertSame(obj, getSame(obj) { it })
+
+    return "OK"
+}

native/native.tests/testData/codegen/funInterface/nonTrivialProjectionInSuperType.kt

@@ -3,15 +3,13 @@
  * that can be found in the LICENSE file.
  */
 
-package codegen.funInterface.nonTrivialProjectionInSuperType
-
 import kotlin.test.*
 
 fun <T> foo(comparator: kotlin.Comparator<in T>, a: T, b: T) = comparator.compare(a, b)
 
 fun bar(x: Int, y: Int) = foo<Int> ({ a, b -> a - b}, x, y)
 
-@Test
-fun test() {
+fun box(): String {
     assertTrue(bar(42, 117) < 0)
+    return "OK"
 }