Native: add test for KT-38850

(the bug was fixed long ago, in 1.4-M1).

kotlin-native/backend.native/tests/interop/objc/tests/kt38850.h

@@ -0,0 +1,10 @@
+#import <Foundation/NSObject.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface KT38850Color : NSObject
++(instancetype)blackColor;
+@property NSString* name;
+@end;
+
+NS_ASSUME_NONNULL_END

kotlin-native/backend.native/tests/interop/objc/tests/kt38850.kt

@@ -0,0 +1,12 @@
+import kotlinx.cinterop.*
+import kotlin.test.*
+import objcTests.*
+
+enum class ColorRef(val color: KT38850Color){
+    Black(KT38850Color.blackColor()),
+}
+
+@Test
+fun testKT38850() {
+    assertEquals("black", ColorRef.Black.color.name)
+}

kotlin-native/backend.native/tests/interop/objc/tests/kt38850.m

@@ -0,0 +1,9 @@
+#import "kt38850.h"
+
+@implementation KT38850Color
++(instancetype)blackColor {
+    KT38850Color* result = [KT38850Color new];
+    result.name = @"black";
+    return result;
+}
+@end;