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

^KT-61259

native/native.tests/testData/framework/objcexport/kt43780.swift

@@ -0,0 +1,58 @@
+import Kt
+
+private func testObject() throws {
+    let object = KT43780TestObject.shared
+    try assertEquals(actual: object.x, expected: 5)
+    try assertEquals(actual: object.y, expected: 6)
+    try assertEquals(actual: object.shared, expected: "shared")
+    try assertEquals(actual: object.Shared, expected: "Shared")
+    try assertTrue(object === KT43780TestObject())
+}
+
+private func testCompanionObject() throws {
+    let object = KT43780TestClassWithCompanion.companion
+    try assertEquals(actual: object.z, expected: 7)
+    try assertTrue(object === KT43780TestClassWithCompanion.Companion())
+    try assertTrue(object === KT43780TestClassWithCompanion.Companion.shared)
+}
+
+private func testNameClash() throws {
+    let object = Shared.shared
+    try assertEquals(actual: object.x, expected: 8)
+    try assertTrue(object === Shared())
+    let object2 = Companion.companion
+    try assertEquals(actual: object2.x, expected: 9)
+    try assertTrue(object2 === Companion.Companion())
+    let object3 = Companion()
+    try assertEquals(actual: object3.t, expected: 10)
+    let object4 = Companion()
+    try assertEquals(actual: object4.t, expected: 10)
+    try assertTrue(object3 !== object4)
+
+    let object5 = KT43780Enum.Companion()
+    try assertEquals(actual: object5.x, expected: 11)
+    try assertTrue(object5 === KT43780Enum.Companion())
+    let enumEntry : KT43780Enum = KT43780Enum.companion
+    try assertEquals(actual: enumEntry.name, expected: "COMPANION")
+    try assertEquals(actual: KT43780Enum.otherEntry.name, expected: "OTHER_ENTRY")
+}
+
+// Reported as https://youtrack.jetbrains.com/issue/KT-47462
+private func testUnexposedCompanion() throws {
+    // Just trying to ensure that the classes are accessible:
+    try assertEquals(actual: 13, expected: ClassWithInternalCompanion().y)
+    try assertEquals(actual: 15, expected: ClassWithPrivateCompanion().y)
+    // and this doesn't make the companions accessible as well.
+}
+
+
+class Kt43780Tests : SimpleTestProvider {
+    override init() {
+        super.init()
+
+        test("testObject", testObject)
+        test("testCompanionObject", testCompanionObject)
+        test("testNameClash", testNameClash)
+        test("testUnexposedCompanion", testUnexposedCompanion)
+    }
+}