[destructuring] More tests for object literal pattern

test/cctest/test-parsing.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 6358 matching lines @@
     "[a,b,c]",
     "{ x : x, y : y }",
     "[]",
     "{}",
     "[{x:x, y:y}, [a,b,c]]",
     "[a,,b]",
     "{42 : x}",
     "{42e-2 : x}",
     "{'hi' : x}",
     "{var: x}",
+    "{}",
     NULL};
   // clang-format on
   static const ParserFlag always_flags[] = {kAllowHarmonyDestructuring};
   RunParserSyncTest(context_data, data, kSuccess, NULL, 0, always_flags,
                     arraysize(always_flags));
 }
 
 
 TEST(DestructuringNegativeTests) {
   i::FLAG_harmony_destructuring = true;
@@ skipping 83 matching lines @@
     const char* data[] = {
       "yield",
       "[yield]",
       "{ x : yield }",
       NULL};
     // clang-format on
     RunParserSyncTest(context_data, data, kError, NULL, 0, always_flags,
                       arraysize(always_flags));
   }
 }