[K/N][Tests] Migrate framework and objcexport tests

^KT-61259

native/native.tests/testData/framework/objcexport/topLevelMangling.swift

@@ -0,0 +1,31 @@
+import Kt
+
+private func testFunctionsInDifferentFilesAreNotMangled() throws {
+    try assertEquals(actual: TopLevelManglingAKt.foo(), expected: "a1")
+    try assertEquals(actual: TopLevelManglingBKt.foo(), expected: "b1")
+}
+
+private func testPropertiesInDifferentFilesAreNotMangled() throws {
+    try assertEquals(actual: TopLevelManglingAKt.bar, expected: "a2")
+    try assertEquals(actual: TopLevelManglingBKt.bar, expected: "b2")
+}
+
+private func testFunctionsInSameFileAreMangled() throws {
+    try assertEquals(actual: TopLevelManglingAKt.sameNumber(value: Int32(1)), expected: 1)
+#if DISABLE_MEMBER_NAME_MANGLING
+    let sameNumberLong = TopLevelManglingAKt.sameNumber(value: Int64(2))
+#else
+    let sameNumberLong = TopLevelManglingAKt.sameNumber(value_: Int64(2))
+#endif
+    try assertEquals(actual: sameNumberLong, expected: 2)
+}
+
+class TopLevelManglingTests : SimpleTestProvider {
+    override init() {
+        super.init()
+
+        test("TestFunctionsInDifferentFilesAreNotMangled", testFunctionsInDifferentFilesAreNotMangled)
+        test("TestPropertiesInDifferentFilesAreNotMangled", testPropertiesInDifferentFilesAreNotMangled)
+        test("TestFunctionsInSameFileAreMangled", testFunctionsInSameFileAreMangled)
+    }
+}