Add a bit of test coverage for callers of destructuring assignment

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 6802 matching lines @@
     "[x, y] = 'str'",
     "[(x,y) => z]",
     "{x: (y) => z}",
     "[x, ...y, z]",
     "[...x,]",
     "[x, y, ...z = 1]",
     "[...z = 1]",
     "[x, y, ...[z] = [1]]",
     "[...[z] = [1]]",
 
+    "[...++x]",
+    "[...x--]",
+    "[...!x]",
+    "[...x + y]",
+
     // v8:4657
     "({ x: x4, x: (x+=1e4) })",
     "(({ x: x4, x: (x+=1e4) }))",
     "({ x: x4, x: (x+=1e4) } = {})",
     "(({ x: x4, x: (x+=1e4) } = {}))",
     "(({ x: x4, x: (x+=1e4) }) = {})",
     "({ x: y } = {})",
     "(({ x: y } = {}))",
     "(({ x: y }) = {})",
     "([a])",
@@ skipping 1379 matching lines @@
     "(a,);",
     "(a,b,c,);",
     NULL
   };
   // clang-format on
 
   static const ParserFlag always_flags[] = {kAllowHarmonyTrailingCommas};
   RunParserSyncTest(context_data, data, kError, NULL, 0, always_flags,
                     arraysize(always_flags));
 }