[runtime] [proxies] adding tests for uncovered branches

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 15056 matching lines @@
   if (is_extensible.FromJust()) return Just(bool_trap_result);
   // 11. Let targetProto be ? target.[[GetPrototypeOf]]().
   Handle<Object> target_proto;
   ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, target_proto,
                                    Object::GetPrototype(isolate, target),
                                    Nothing<bool>());
   // 12. If booleanTrapResult is true and SameValue(V, targetProto) is false,
   // throw a TypeError exception.
   if (bool_trap_result && !value->SameValue(*target_proto)) {
     isolate->Throw(*isolate->factory()->NewTypeError(
-        MessageTemplate::kProxyTrapViolatesInvariant, target));
+        MessageTemplate::kProxyTrapViolatesInvariant, trap_name));
     return Nothing<bool>();
   }
   // 13. Return booleanTrapResult.
   return Just(bool_trap_result);
 }
 
 
 Maybe<bool> JSObject::SetPrototype(Handle<JSObject> object,
                                    Handle<Object> value, bool from_javascript,
                                    ShouldThrow should_throw) {
@@ skipping 4075 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8