Add @_objcImpl test case with an ObjC subclass

Author: beccadax

test/Interpreter/objc_implementation_objc_client.m

@@ -0,0 +1,74 @@
+//
+// Build objc_implementation.framework
+//
+// RUN: %empty-directory(%t-frameworks)
+// RUN: %empty-directory(%t-frameworks/objc_implementation.framework/Modules/objc_implementation.swiftmodule)
+// RUN: %empty-directory(%t-frameworks/objc_implementation.framework/Headers)
+// RUN: cp %S/Inputs/objc_implementation.modulemap %t-frameworks/objc_implementation.framework/Modules/module.modulemap
+// RUN: cp %S/Inputs/objc_implementation.h %t-frameworks/objc_implementation.framework/Headers
+// RUN: %target-build-swift-dylib(%t-frameworks/objc_implementation.framework/objc_implementation) -emit-module-path %t-frameworks/objc_implementation.framework/Modules/objc_implementation.swiftmodule/%module-target-triple.swiftmodule -module-name objc_implementation -F %t-frameworks -import-underlying-module -Xlinker -install_name -Xlinker %t-frameworks/objc_implementation.framework/objc_implementation %S/objc_implementation.swift
+
+//
+// Execute this file
+//
+// RUN: %empty-directory(%t)
+// RUN: %target-clang %s -isysroot %sdk -F %t-frameworks -lobjc -fmodules -fobjc-arc -o %t/objc_implementation_objc_client
+// RUN: %target-codesign %t/objc_implementation_objc_client
+// RUN: %target-run %t/objc_implementation_objc_client 2>&1 | %FileCheck %s
+
+// REQUIRES: executable_test
+// REQUIRES: objc_interop
+
+#import <Foundation/Foundation.h>
+#import <objc_implementation/objc_implementation.h>
+#import <stdlib.h>
+
+@interface ObjCClientSubclass : ImplClass
+
+- (NSString *)someMethod;
+
+@end
+
+static void print(NSString *str) {
+  NSData *strData = [str dataUsingEncoding:NSUTF8StringEncoding];
+  NSData *nlData = [@"\n" dataUsingEncoding:NSUTF8StringEncoding];
+
+  NSFileHandle *out = NSFileHandle.fileHandleWithStandardOutput;
+
+  if (@available(macOS 10.15, iOS 13.0, watchOS 6.0, *)) {
+    NSError *error;
+    if (![out writeData:strData error:&error]
+        || ![out writeData:nlData error:&error]) {
+      NSLog(@"I/O error writing to stdout: %@", error);
+      exit(EXIT_FAILURE);
+    }
+  }
+  else {
+    [out writeData:strData];
+    [out writeData:nlData];
+  }
+}
+
+int main() {
+  [ImplClass runTests];
+  // CHECK: ImplClass.someMethod()
+  // CHECK: SwiftSubclass.someMethod()
+
+  fflush(stdout);
+
+  print([[[ImplClass alloc] init] someMethod]);
+  // CHECK: ImplClass.someMethod()
+
+  print([[[ObjCClientSubclass alloc] init] someMethod]);
+  // CHECK: -[ObjCClientSubclass someMethod]
+
+  return 0;
+}
+
+@implementation ObjCClientSubclass
+
+- (NSString *)someMethod {
+  return @"-[ObjCClientSubclass someMethod]";
+}
+
+@end