[K/N] Migrate runtime/collections tests to new testing infra ^KT-61259

kotlin-native/runtime/test/collections/MutableCollectionsNativeTest.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2023 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 test.collection
+
+import kotlin.test.*
+
+// Native-specific part of stdlib/test/collections/MutableCollectionsTest.kt
+class MutableCollectionsNativeTest {
+    @Test fun sortListString() {
+        val x = mutableListOf("x", "a", "b")
+        x.sort()
+        assertContentEquals(listOf("a", "b", "x"), x)
+    }
+
+    @Test fun sortListInt() {
+        val x = mutableListOf(239, 42, -1, 100500, 0)
+        x.sort()
+        assertContentEquals(listOf(-1, 0, 42, 239, 100500), x)
+    }
+}