[K/N][tests] Migrate various runtime/ tests ^KT-61259

native/native.tests/testData/gc/throwable.kt

@@ -0,0 +1,25 @@
+// DISABLE_NATIVE: gcType=NOOP
+import kotlin.native.ref.WeakReference
+import kotlin.native.runtime.GC
+import kotlin.test.*
+
+@OptIn(kotlin.experimental.ExperimentalNativeApi::class)
+private fun makeWeakRef(create: () -> Any) = WeakReference(create())
+
+@OptIn(kotlin.native.runtime.NativeRuntimeApi::class, kotlin.experimental.ExperimentalNativeApi::class)
+private fun ensureGetsCollected(create: () -> Any) {
+    val ref = makeWeakRef(create)
+    GC.collect()
+    assertNull(ref.get())
+}
+
+@OptIn(kotlin.experimental.ExperimentalNativeApi::class)
+@Test
+fun test() {
+    ensureGetsCollected { Throwable() }
+    ensureGetsCollected {
+        val throwable = Throwable()
+        throwable.getStackTrace()
+        throwable
+    }
+}