Add trivial test for @OverrideInit

backend.native/tests/interop/objc/smoke.h

@@ -154,4 +154,9 @@ NSObject* createNSObject() {
 
 @interface TestVarargs (TestVarargsExtension)
 -(instancetype _Nonnull)initWithFormat:(NSString*)format, ...;
+@end;
+
+@interface TestOverrideInit : NSObject
+-(instancetype)initWithValue:(int)value NS_DESIGNATED_INITIALIZER;
++(instancetype)createWithValue:(int)value;
 @end;

backend.native/tests/interop/objc/smoke.kt

@@ -22,6 +22,7 @@ fun run() {
     testBlocks()
     testCustomRetain()
     testVarargs()
+    testOverrideInit()
 
     assertEquals(2, ForwardDeclaredEnum.TWO.value)
 
@@ -299,6 +300,14 @@ fun testVarargs() {
     )
 }
 
+fun testOverrideInit() {
+    assertEquals(42, (TestOverrideInitImpl.createWithValue(42) as TestOverrideInitImpl).value)
+}
+
+class TestOverrideInitImpl @OverrideInit constructor(val value: Int) : TestOverrideInit(value) {
+    companion object : TestOverrideInitMeta()
+}
+
 private class MyException : Throwable()
 
 fun nsArrayOf(vararg elements: Any): NSArray = NSMutableArray().apply {

backend.native/tests/interop/objc/smoke.m

@@ -144,4 +144,14 @@ static CustomRetainMethodsImpl* retainedCustomRetainMethodsImpl;
     return result;
 }
 
+@end;
+
+@implementation TestOverrideInit
+-(instancetype)initWithValue:(int)value {
+    return self = [super init];
+}
+
++(instancetype)createWithValue:(int)value {
+    return [[self alloc] initWithValue:value];
+}
 @end;