[JSON] call replacer function with correct holder in JSON.stringify

test/mjsunit/json-stringify-holder.js

+// Copyright 2016 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.
+
+(function testBasic() {
+  var stack = [];
+  var object = {a: false};
+  var replaced = {a: false, replaced: true};
+
+  function replacer(key, value) {
+    stack.push({ holder: this, key, value });
+    if (stack.length === 1) return replaced;
+    if (key === "a") return true;
+    return value;
+  }
+
+  assertEquals(`{"a":true,"replaced":true}`, JSON.stringify(object, replacer));
+
+  assertEquals([
+    {
+      holder: { "": { a: false } },
+      key: "",
+      value: { a: false }
+    },
+    {
+      holder: { a: false, replaced: true },
+      key: "a",
+      value: false
+    },
+    {
+      holder: { a: false, replaced: true },
+      key: "replaced",
+      value: true
+    }
+  ], stack);
+
+  assertSame(stack[0].holder[""], object);
+  assertSame(stack[0].value, object);
+  assertSame(stack[1].holder, replaced);
+  assertSame(stack[2].holder, replaced);
+})();
+
+(function testToJSON() {
+  var stack = [];
+  var object = {a: false, toJSON };
+  var nested = { toJSON: nestedToJSON };
+  var replaced = {a: false, replaced: true, nested };
+  var toJSONd = {a: false, toJSONd: true }
+  var nestedToJSONd = { nestedToJSONd: true };
+
+  function toJSON(key, value) {
+    return toJSONd;
+  }
+
+  function nestedToJSON(key, value) {
+    return nestedToJSONd;
+  }
+
+  function replacer(key, value) {
+    stack.push({ holder: this, key, value });
+    if (stack.length === 1) return replaced;
+    if (key === "a") return true;
+    return value;
+  }
+
+  assertEquals(`{"a":true,"replaced":true,"nested":{"nestedToJSONd":true}}`,
+               JSON.stringify(object, replacer));
+
+  assertEquals([
+    {
+      holder: { "": { a: false, toJSON: toJSON } },
+      key: "",
+      value: { a: false, toJSONd: true }
+    },
+    {
+      holder: { a: false, replaced: true, nested: { toJSON: nestedToJSON } },
+      key: "a",
+      value: false
+    },
+    {
+      holder: { a: false, replaced: true, nested: { toJSON: nestedToJSON } },
+      key: "replaced",
+      value: true
+    },
+    {
+      holder: { a: false, replaced: true, nested: { toJSON: nestedToJSON } },
+      key: "nested",
+      value: { nestedToJSONd: true }
+    },
+    {
+      holder: { nestedToJSONd: true },
+      key: "nestedToJSONd",
+      value: true
+    }
+  ], stack);
+
+  assertSame(stack[0].holder[""], object);
+  assertSame(stack[0].value, toJSONd);
+  assertSame(stack[1].holder, replaced);
+  assertSame(stack[2].holder, replaced);
+  assertSame(stack[3].holder, replaced);
+  assertSame(stack[3].value, nestedToJSONd);
+  assertSame(stack[4].holder, nestedToJSONd);
+})();