[api] Expose ES6 7.3.14 SetIntegrityLevel on v8::Object

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 24967 matching lines @@
   }
   delete garbage;
   // Check that moderate memory pressure notification sets GC into memory
   // optimizing mode.
   isolate->MemoryPressureNotification(v8::MemoryPressureLevel::kModerate);
   CHECK(CcTest::i_isolate()->heap()->ShouldOptimizeForMemoryUsage());
   // Check that disabling memory pressure returns GC into normal mode.
   isolate->MemoryPressureNotification(v8::MemoryPressureLevel::kNone);
   CHECK(!CcTest::i_isolate()->heap()->ShouldOptimizeForMemoryUsage());
 }
+
+TEST(SetIntegrityLevel) {
+  LocalContext context;
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::HandleScope scope(isolate);
+
+  v8::Local<v8::Object> obj = v8::Object::New(isolate);
+  CHECK(context->Global()->Set(context.local(), v8_str("o"), obj).FromJust());
+
+  v8::Local<v8::Value> is_frozen = CompileRun("Object.isFrozen(o)");
+  CHECK(!is_frozen->BooleanValue(context.local()).FromJust());
+
+  CHECK(obj->SetIntegrityLevel(context.local(), v8::IntegrityLevel::kFrozen)
+            .FromJust());
+
+  is_frozen = CompileRun("Object.isFrozen(o)");
+  CHECK(is_frozen->BooleanValue(context.local()).FromJust());
+}