text: /*
   * Copyright 2018 Jacek Caban for CodeWeavers
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  var JS_E_PROP_DESC_MISMATCH = 0x800a01bd;
  var JS_E_INVALID_WRITABLE_PROP_DESC = 0x800a13ac;
  var JS_E_NONCONFIGURABLE_REDEFINED = 0x800a13d6;
  var JS_E_NONWRITABLE_MODIFIED = 0x800a13d7;
  
  var tests = [];
  
  sync_test("date_now", function() {
      var now = Date.now();
      var time = (new Date()).getTime();
  
      ok(time >= now && time-now < 50, "unexpected Date.now() result " + now + " expected " + time);
  
      Date.now(1, 2, 3);
  });
  
  sync_test("toISOString", function() {
      function expect(date, expected) {
          var s = date.toISOString();
          ok(s === expected, "toISOString returned " + s + " expected " + expected);
      }
  
      function expect_exception(func) {
          try {
              func();
          }catch(e) {
              return;
          }
          ok(false, "expected exception");
      }
  
      expect(new Date(0), "1970-01-01T00:00:00.000Z");
      expect(new Date(0xdeadbeef), "1970-02-13T05:45:28.559Z");
      expect(new Date(10928309128301), "2316-04-22T01:25:28.301Z");
      expect(new Date(-1), "1969-12-31T23:59:59.999Z");
      expect(new Date(-62167219200000), "0000-01-01T00:00:00.000Z");
      expect(new Date(-62167219200001), "-000001-12-31T23:59:59.999Z");
      expect(new Date(-6216721920000100), "-195031-12-03T23:59:59.900Z");
      expect(new Date(1092830912830100), "+036600-06-07T22:27:10.100Z");
  
      expect_exception(function() { new Date(NaN).toISOString(); });
      expect_exception(function() { new Date(31494784780800001).toISOString(); });
  });
  
  sync_test("indexOf", function() {
      function expect(array, args, exr) {
          var r = Array.prototype.indexOf.apply(array, args);
          ok(r == exr, "indexOf returned " + r + " expected " + exr);
      }
  
      ok(Array.prototype.indexOf.length == 1, "indexOf.length = " + Array.prototype.indexOf.length);
  
      expect([1,2,3], [2], 1);
      expect([1,undefined,3], [undefined], 1);
      expect([1,undefined,3], [], 1);
      expect([1,,3], [undefined], -1);
      expect([1,2,3,4,5,6], [2, 2], -1);
      expect([1,2,3,4,5,6], [5, -1], -1);
      expect([1,2,3,4,5,6], [5, -2], 4);
      expect([1,2,3,4,5,6], [5, -20], 4);
      expect([1,2,3,4,5,6], [5, 20], -1);
      expect("abc", ["b"], 1);
      expect(true, [true], -1);
      expect({"4": 4, length: 5}, [4], 4);
      expect({"4": 4, length: 5}, [undefined], -1);
      expect({"4": 4, length: 3}, [4], -1);
      expect({"test": true}, [true], -1);
      expect([1,2,3], [2, 1.9], 1);
  });
  
  sync_test("forEach", function() {
      ok(Array.prototype.forEach.length === 1, "forEach.length = " + Array.prototype.forEach.length);
  
      function test(array, expect) {
          var r = Array.prototype.forEach.call(array, function(value, index, arr) {
              ok(arr === array, "unexpected array " + arr);
              ok(index === expect[0][0], "index = " + index + " expected " + expect[0][0]);
              ok(value === expect[0][1], "value = " + value + " expected " + expect[0][1]);
              expect.shift();
          });
          ok(r === undefined, "forEach returned " + r);
          ok(expect.length === 0, "too few forEach() calls, expected " + expect.length + " more");
      }
  
      test(["a",2,"c"], [[0,"a"],[1,2],[2,"c"]]);
      test({length: 1000, 500: false, c: 30, 3: "x", 999: 1}, [[3,"x"],[500,false],[999,1]]);
      test(new String("abc"), [[0,"a"],[1,"b"],[2,"c"]]);
      test([], []);
  
      [1,2].forEach(function() {
          ok(this === window, "this != window");
      });
      [1,2].forEach(function() {
          ok(this === window, "this != window");
      }, undefined);
  
      var o = new Object(), a = [1,2];
      a.forEach(function(value, index, array) {
          ok(array === a, "array != a");
          ok(this === o, "this != o");
      }, o);
  });
  
  sync_test("isArray", function() {
      function expect_array(a, exr) {
          var r = Array.isArray(a);
          ok(r === exr, "isArray returned " + r + " expected " + exr);
      }
  
      expect_array([1], true);
      expect_array(Array, false);
      expect_array(new Array(), true);
      expect_array({"1": 1, "2": 2, length: 2}, false);
  
      function C() {}
      C.prototype = Array.prototype;
      expect_array(new C(), false);
  });
  
  sync_test("array_map", function() {
      var calls, m, arr, ctx;
  
      /* basic map call with context */
      calls = "";
      arr = [1,2,3];
      ctx = {};
      m = arr.map(function(x, i, a) {
          ok(this === ctx, "this != ctx");
          ok(i === x - 1, "i = " + i);
          ok(a === arr, "a != arr");
          calls += x + ",";
          return x * 2;
      }, ctx);
      ok(calls === "1,2,3,", "calls = " + calls);
      ok(m.join() === "2,4,6", "m = " + m);
  
      /* non-array object as this argument */
      calls = "";
      arr = { 1: "one", 2: "two", 3: "three", length: 3 };
      m = Array.prototype.map.call(arr, function(x, i) {
          calls += i + ":" + x + ",";
          return x + "!";
      });
      ok(calls === "1:one,2:two,", "calls = " + calls);
      ok(m.join() === ",one!,two!", "m = " + m);
      ok(!("0" in m), "0 is in m");
  
      /* mutate array in callback */
      calls = "";
      arr = [1,2,3];
      m = Array.prototype.map.call(arr, function(x, i) {
          calls += i + ":" + x + ",";
          for(var j = i; j < arr.length; j++)
              arr[j]++;
          arr.push(i * i);
          return x - 1;
      });
      ok(calls === "0:1,1:3,2:5,", "calls = " + calls);
      ok(m.join() === "0,2,4", "m = " + m);
  
      [1,2].map(function() {
          ok(this === window, "this != window");
      });
      [1,2].map(function() {
          ok(this === window, "this != window");
      }, undefined);
  });
  
  sync_test("array_sort", function() {
      var r;
  
      r = [3,1,2].sort(function(x,y) { return y-x; }, 1, 2, 3, true, undefined ).join();
      ok(r === "3,2,1", "reverse sorted [3,1,2] = " + r);
  
      r = [3,1,2].sort(undefined).join();
      ok(r === "1,2,3", "null sorted [3,1,2] = " + r);
  
      try {
          r = [3,1,2].sort(null);
          ok(false, "expected sort(null) exception");
      }catch(e) {
          ok(e.name === "TypeError", "got exception " + e.name);
      }
  });
  
  sync_test("identifier_keywords", function() {
      var o = {
          if: 1,
          default: 2,
          function: 3,
          break: true,
          case: true,
          catch: true,
          continue: true,
          delete: true,
          do: true,
          else: true,
          finally: true,
          for: true,
          in: true,
          instanceof: true,
          new: true,
          return: true,
          switch: true,
          throw: true,
          try: true,
          typeof: true,
          var: true,
          void: true,
          while: true,
          with: true,
          true: true,
          false: true,
          null: true,
          this: true
      };
      function ro() { return o; };
  
      ok(o.if === 1, "o.if = " + o.if);
      ok(ro().default === 2, "ro().default = " + ro().default);
      ok(o.false === true, "o.false = " + o.false);
  });
  
  function test_own_data_prop_desc(obj, prop, expected_writable, expected_enumerable,
                                   expected_configurable) {
      var desc = Object.getOwnPropertyDescriptor(obj, prop);
      ok("value" in desc, "value is not in desc");
      ok(desc.value === obj[prop], "desc.value = " + desc.value + " expected " + obj[prop]);
      ok(desc.writable === expected_writable, "desc(" + prop + ").writable = " + desc.writable
         + " expected " + expected_writable);
      ok(desc.enumerable === expected_enumerable, "desc.enumerable = " + desc.enumerable
         + " expected " + expected_enumerable);
      ok(desc.configurable === expected_configurable, "desc.configurable = " + desc.configurable
         + " expected " + expected_configurable);
  }
  
  sync_test("getOwnPropertyDescriptor", function() {
      var obj;
  
      obj = { test: 1 };
      test_own_data_prop_desc(obj, "test", true, true, true);
  
      test_own_data_prop_desc(Object, "getOwnPropertyDescriptor", true, false, true);
      test_own_data_prop_desc(Math, "PI", false, false, false);
  
      var obj = new String();
      test_own_data_prop_desc(obj, "length", false, false, false);
      ok(Object.getOwnPropertyDescriptor(obj, "slice") === undefined,
         "getOwnPropertyDescriptor(slice) did not return undefined");
      test_own_data_prop_desc(String.prototype, "slice", true, false, true);
  
      obj = new Array();
      test_own_data_prop_desc(obj, "length", true, false, false);
  
      obj = new Function();
      test_own_data_prop_desc(obj, "length", false, false, false);
      test_own_data_prop_desc(obj, "arguments", false, false, false);
  
      obj = /test/;
      test_own_data_prop_desc(obj, "global", false, false, false);
      test_own_data_prop_desc(obj, "ignoreCase", false, false, false);
      test_own_data_prop_desc(obj, "lastIndex", true, false, false);
      test_own_data_prop_desc(obj, "multiline", false, false, false);
      test_own_data_prop_desc(obj, "source", false, false, false);
  
      (function() {
          test_own_data_prop_desc(arguments, "length", true, false, true);
          test_own_data_prop_desc(arguments, "callee", true, false, true);
      })();
  
      test_own_data_prop_desc(String, "prototype", false, false, false);
      test_own_data_prop_desc(function(){}, "prototype", true, false, false);
      test_own_data_prop_desc(Function, "prototype", false, false, false);
      test_own_data_prop_desc(String.prototype, "constructor", true, false, true);
  });
  
  sync_test("defineProperty", function() {
      function test_accessor_prop_desc(obj, prop, orig_desc) {
          var expected_enumerable = "enumerable" in orig_desc && !!orig_desc.enumerable;
          var expected_configurable = "configurable" in orig_desc && !!orig_desc.configurable;
  
          var desc = Object.getOwnPropertyDescriptor(obj, prop);
          ok(desc.enumerable === expected_enumerable, "desc.enumerable = " + desc.enumerable
             + " expected " + expected_enumerable);
          ok(desc.configurable === expected_configurable, "desc.configurable = " + desc.configurable
             + " expected " + expected_configurable);
          ok(desc.get === orig_desc.get, "desc.get = " + desc.get);
          ok(desc.set === orig_desc.set, "desc.set = " + desc.set);
      }
  
      function expect_exception(func, expected_number) {
          try {
              func();
          }catch(e) {
              var n = e.number + 0x100000000; /* make it unsigned like HRESULT */
              todo_wine_if(expected_number == JS_E_PROP_DESC_MISMATCH).
              ok(n === expected_number, "got exception " + n.toString(16)
                 + " expected " + expected_number.toString(16));
              ok(e.name === "TypeError", "e.name = " + e.name);
              return;
          }
          ok(false, "expected exception");
      }
  
      var obj = new Object(), defined;
      defined = Object.defineProperty(obj, "test", {});
      ok(defined === obj, "defined != obj");
      ok("test" in obj, "test is not in obj");
      test_own_data_prop_desc(obj, "test", false, false, false);
      ok(obj.test === undefined, "obj.test = " + obj.test);
  
      Object.defineProperty(obj, "all", {writable: true, enumerable: true, configurable: true, value: 1});
      test_own_data_prop_desc(obj, "all", true, true, true);
      ok(obj.all === 1, "obj.test = " + obj.test);
  
      Object.defineProperty(obj, "all", {writable: false});
      test_own_data_prop_desc(obj, "all", false, true, true);
      ok(obj.all === 1, "obj.test = " + obj.test);
  
      var getsetprop_value = 1;
      var desc = {
          get: function() {
              return getsetprop_value;
          },
          set: function(v) {
              getsetprop_value = v;
          }
      };
      Object.defineProperty(obj, "getsetprop", desc);
      test_accessor_prop_desc(obj, "getsetprop", desc);
  
      ok(obj.getsetprop === 1, "getsetprop = " + obj.getsetprop);
      obj.getsetprop = 2;
      ok(getsetprop_value === 2, "getsetprop_value = " + getsetprop_value);
      test_accessor_prop_desc(obj, "getsetprop", desc);
      ok(obj.getsetprop === 2, "getsetprop = " + obj.getsetprop);
  
      Object.defineProperty(obj, "notConf", {writable: true, enumerable: true, configurable: false, value: 1});
      test_own_data_prop_desc(obj, "notConf", true, true, false);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConf",
                                {writable: true, enumerable: true, configurable: true, value: 1});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConf",
                                {writable: true, enumerable: false, configurable: false, value: 1});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      Object.defineProperty(obj, "notConf",
                            {writable: true, enumerable: true, configurable: false, value: 2});
      test_own_data_prop_desc(obj, "notConf", true, true, false);
  
      Object.defineProperty(obj, "notConf", {writable: true, value: 2});
      test_own_data_prop_desc(obj, "notConf", true, true, false);
  
      Object.defineProperty(obj, "notConf2",
                            {writable: false, enumerable: false, configurable: false, value: 1});
      test_own_data_prop_desc(obj, "notConf2", false, false, false);
      obj.notConf2 = 2;
      ok(obj.notConf2 === 1, "obj.notConf2 = " + obj.notConf2)
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConf2",
                                {writable: false, enumerable: false, configurable: true, value: 1});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConf2",
                                {writable: false, enumerable: true, configurable: false, value: 1});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConf2", {writable: true, value: 1});
      }, JS_E_NONWRITABLE_MODIFIED);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConf2", {value: 2});
      }, JS_E_NONWRITABLE_MODIFIED);
  
      Object.defineProperty(obj, "notConf2",
                            {writable: false, enumerable: false, configurable: false, value: 1});
      test_own_data_prop_desc(obj, "notConf2", false, false, false);
  
      Object.defineProperty(obj, "notConf2", {writable: false, value: 1});
      test_own_data_prop_desc(obj, "notConf2", false, false, false);
  
      desc = {
          get: function() {
              return getsetprop_value;
          },
          set: function(v) {
              getsetprop_value = v;
          },
          configurable: false
      };
      Object.defineProperty(obj, "notConfAcc", desc);
      test_accessor_prop_desc(obj, "notConfAcc", desc);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConfAcc", {value: 1});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConfAcc", {get: desc.get, set: function () {}});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConfAcc", {get: undefined, set: desc.set});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      expect_exception(function() {
          Object.defineProperty(obj, "notConfAcc", {writable: true});
      }, JS_E_NONCONFIGURABLE_REDEFINED);
  
      Object.defineProperty(obj, "notConfAcc", {get: desc.get});
      test_accessor_prop_desc(obj, "notConfAcc", desc);
  
      Object.defineProperty(obj, "notConfAcc", {set: desc.set});
      test_accessor_prop_desc(obj, "notConfAcc", desc);
  
      Object.defineProperty(obj, "notConfAcc", {configurable: false});
      test_accessor_prop_desc(obj, "notConfAcc", desc);
  
      desc = {
          get: function() {
              return getsetprop_value;
          },
          set: function(v) {
              getsetprop_value = v;
          },
          configurable: true
      };
      Object.defineProperty(obj, "confAcc", desc);
      test_accessor_prop_desc(obj, "confAcc", desc);
  
      Object.defineProperty(obj, "confAcc", {writable: 1});
      test_own_data_prop_desc(obj, "confAcc", true, false, true);
  
      Object.defineProperty(obj, "confAcc", desc);
      test_accessor_prop_desc(obj, "confAcc", desc);
  
      desc.get = function() {};
      desc.set = undefined;
      Object.defineProperty(obj, "confAcc", desc);
      test_accessor_prop_desc(obj, "confAcc", desc);
  
      expect_exception(function() {
          Object.defineProperty(obj, "invaliddesc", {get: undefined, value: 1});
      }, JS_E_PROP_DESC_MISMATCH);
  
      expect_exception(function() {
          Object.defineProperty(obj, "invaliddesc", {set: undefined, writable: true});
      }, JS_E_INVALID_WRITABLE_PROP_DESC);
  
      function child() {}
      desc = {
          get: function() {
              ok(this === obj, "this != obj");
              return getsetprop_value;
          },
          set: function(v) {
              ok(this === obj, "this != obj");
              getsetprop_value = v;
          },
          configurable: true
      };
      Object.defineProperty(child.prototype, "parent_accessor", desc);
  
      obj = new child();
      getsetprop_value = 6;
      ok(obj.parent_accessor === 6, "parent_accessor = " + obj.parent_accessor);
      obj.parent_accessor = 1;
      ok(getsetprop_value === 1, "getsetprop_value = " + getsetprop_value);
      ok(obj.parent_accessor === 1, "parent_accessor = " + obj.parent_accessor);
  
      ok(Object.getOwnPropertyDescriptor(obj, "parent_accessor") === undefined,
         "getOwnPropertyDescriptor(parent_accessor) did not return undefined");
      test_accessor_prop_desc(child.prototype, "parent_accessor", desc);
  
      desc.get = undefined;
      Object.defineProperty(child.prototype, "parent_accessor", desc);
      ok(obj.parent_accessor === undefined, "parent_accessor = " + obj.parent_accessor);
  
      /* no setter */
      desc = {
          get: function() {
              ok(this === obj, "this != obj");
              return true;
          },
          configurable: true
      };
      Object.defineProperty(obj, "no_setter", desc);
      test_accessor_prop_desc(obj, "no_setter", desc);
      obj.no_setter = false;
      ok(obj.no_setter === true, "no_setter = " + obj.no_setter);
  
      /* call prop with getter */
      desc = {
          get: function() {
              return function(x) {
                  ok(x === 100, "x = " + x);
                  return 10;
              };
          }
      };
      Object.defineProperty(obj, "funcprop", desc);
      test_accessor_prop_desc(obj, "funcprop", desc);
      ok(obj.funcprop(100) === 10, "obj.funcprop() = " + obj.funcprop(100));
  });
  
  sync_test("defineProperties", function() {
      var o, defined, descs;
  
      descs = {
          acc_prop: { get: function() { return 1; } },
          prop: { value: 2 },
          e: { enumerable: true }
      };
  
      o = new Object();
      defined = Object.defineProperties(o, descs);
      ok(defined === o, "defined != o");
      ok(o.acc_prop === 1, "o.acc_prop = " + o.acc_prop);
      ok(o.prop === 2, "o.prop = " + o.prop);
      ok(o.e === undefined, "o.e = " + o.e);
      ok("e" in o, "e is not in o");
      test_own_data_prop_desc(o, "prop", false, false, false);
      test_own_data_prop_desc(o, "e", false, true, false);
      for(var p in o) ok(p === "e", "p = " + p);
  
      o = new Object();
      Object.defineProperties(o, 1);
      for(var p in o) ok(false, "o has property " + p);
  
      o = Object.create(null, descs);
      ok(o.acc_prop === 1, "o.acc_prop = " + o.acc_prop);
      ok(o.prop === 2, "o.prop = " + o.prop);
      ok(o.e === undefined, "o.e = " + o.e);
      ok("e" in o, "e is not in o");
      test_own_data_prop_desc(o, "prop", false, false, false);
      test_own_data_prop_desc(o, "e", false, true, false);
      for(var p in o) ok(p === "e", "p = " + p);
  
      var desc_proto = new Object();
      desc_proto.proto_prop = { value: true, enumerable: true };
      descs = Object.create(desc_proto);
      o = Object.create(null, descs);
      ok(!("proto_prop" in o), "proto_prop is in o");
  });
  
  sync_test("property_definitions", function() {
      var obj, val, i, arr;
  
      function test_accessor_prop_desc(obj, prop, have_getter, have_setter) {
          var desc = Object.getOwnPropertyDescriptor(obj, prop);
          ok(desc.enumerable === true, "desc.enumerable = " + desc.enumerable);
          ok(desc.configurable === true, "desc.configurable = " + desc.configurable);
  
          if(have_getter) {
              ok(typeof(desc.get) === "function", "desc.get = " + desc.get);
              ok(typeof(desc.get.prototype) === "object", "desc.get.prototype = " + desc.get.prototype);
          }else {
              ok(!("get" in obj), "desc.get = " + desc.get);
          }
  
          if(have_setter) {
              ok(typeof(desc.set) === "function", "desc.set = " + desc.set);
              ok(typeof(desc.set.prototype) === "object", "desc.set.prototype = " + desc.set.prototype);
          }else {
              ok(!("set" in obj), "desc.get = " + desc.get);
          }
      }
  
      obj = {
          get prop()  { return val + 1; },
          set prop(v) { val = v; }
      };
      test_accessor_prop_desc(obj, "prop", true, true);
      val = 0;
      ok(obj.prop === 1, "obj.prop = " + obj.prop);
      obj.prop = 3;
      ok(val === 3, "val = " + val);
      ok(obj.prop === 4, "obj.prop = " + obj.prop);
  
      arr = [];
      for(i in obj)
          arr.push(i);
      ok(arr.join() === "prop", "prop of obj = " + arr.join());
  
      obj = {
          set prop(v) { val = v; }
      };
      test_accessor_prop_desc(obj, "prop", false, true);
      val = 1;
      ok(obj.prop === undefined, "obj.prop = " + obj.prop);
      obj.prop = 2;
      ok(val === 2, "val = " + val);
      ok(obj.prop === undefined, "obj.prop = " + obj.prop);
  
      obj = {
          get prop()  { return val + 1; },
          get 0()     { return val + 2; }
      };
      test_accessor_prop_desc(obj, "prop", true, false);
      val = 5;
      ok(obj.prop === 6, "obj.prop = " + obj.prop);
      obj.prop = 10;
      ok(val === 5, "val = " + val);
      ok(obj.prop === 6, "obj.prop = " + obj.prop);
      test_accessor_prop_desc(obj, "0", true, false);
      ok(obj[0] === 7, "obj.prop = " + obj[0]);
  });
  
  sync_test("string_trim", function() {
      function test_trim(value, expected) {
          var r = String.prototype.trim.call(value);
          ok(r === expected, "trim(" + value + ") = " + r);
      }
  
      test_trim("test", "test");
      test_trim(false, "false");
      test_trim("\n \t\rte st\t\t\n", "te st");
      test_trim({ toString: function() { return " test "; } }, "test");
      test_trim("", "");
      test_trim(" \t\n", "");
  });
  
  sync_test("global_properties", function() {
      var o;
  
      /* Make sure that global properties are not writable. */
      o = NaN;
      NaN = 1;
      ok(isNaN(NaN), "NaN = " + NaN);
      o = undefined;
      undefined = 1;
      ok(undefined === o, "NaN = " + NaN);
      o = Infinity;
      Infinity = 1;
      ok(Infinity === o, "Infinity = " + NaN);
  });
  
  sync_test("string_split", function() {
      var r;
  
      /* IE9 got this wrong*/
      if("1undefined2".split(undefined).length != 1) {
          win_skip("detected broken String.prototype.split implementation");
          return;
      }
  
      function test(string, separator, result) {
          var r = string.split(separator);
          ok(r == result, "\"" + string + "\".split(" + separator + ") returned " + r + " expected " + result);
      }
  
      test("test", /^|\s+/, "test");
      test("test", /$|\s+/, "test");
      test("test", /^|./, "t,,,");
      test("test", /.*/, ",");
      test("test", /x*/, "t,e,s,t");
      test("test", /$|x*/, "t,e,s,t");
      test("test", /^|x*/, "t,e,s,t");
      test("test", /t*/, ",e,s,");
      test("xaabaax", /a*|b*/, "x,b,x");
      test("xaabaax", /a+|b+/, "x,,,x");
      test("xaabaax", /a+|b*/, "x,,,x");
      test("xaaxbaax", /b+|a+/, "x,x,,x");
      test("test", /^|t/, "tes,");
      test("test", /^|t/, "tes,");
      test("a,,b", /,/, "a,,b");
      test("ab", /a*/, ",b");
      test("aab", "a", ",,b");
      test("a", "a", ",");
  
      function test_length(string, separator, len) {
          var r = string.split(separator);
          ok(r.length === len, "\"" + string + "\".split(" + separator + ").length = "
             + r.length + " expected " + len);
      }
  
      test_length("", /a*/, 0);
      test_length("", /a+/, 1);
      test_length("", "", 0);
      test_length("", "x", 1);
  
      r = "1,2,3".split(undefined);
      ok(typeof(r) === "object", "typeof(r) = " + typeof(r));
      ok(r.length === 1, "r.length = " + r.length);
      ok(r[0] === "1,2,3", "r[0] = " + r[0]);
  
      r = "1,undefined2undefined,3".split(undefined);
      ok(typeof(r) === "object", "typeof(r) = " + typeof(r));
      ok(r.length === 1, "r.length = " + r.length);
      ok(r[0] === "1,undefined2undefined,3", "r[0] = " + r[0]);
  
      r = "1,undefined2undefined,3".split();
      ok(typeof(r) === "object", "typeof(r) = " + typeof(r));
      ok(r.length === 1, "r.length = " + r.length);
      ok(r[0] === "1,undefined2undefined,3", "r[0] = " + r[0]);
  
      /* note: spec violation, limit is ignored */
      r = "1,undefined2undefined,3".split(undefined, 0);
      ok(typeof(r) === "object", "typeof(r) = " + typeof(r));
      ok(r.length === 1, "r.length = " + r.length);
      ok(r[0] === "1,undefined2undefined,3", "r[0] = " + r[0]);
  
      r = "1,undefined2null,3".split(null);
      ok(typeof(r) === "object", "typeof(r) = " + typeof(r));
      ok(r.length === 2, "r.length = " + r.length);
      ok(r[0] === "1,undefined2", "r[0] = " + r[0]);
      ok(r[1] === ",3", "r[1] = " + r[1]);
  
      r = "".split();
      ok(typeof(r) === "object", "typeof(r) = " + typeof(r));
      ok(r.length === 1, "r.length = " + r.length);
      ok(r[0] === "", "r[0] = " + r[0]);
  });
  
  sync_test("getPrototypeOf", function() {
      ok(Object.create.length === 2, "Object.create.length = " + Object.create.length);
      ok(Object.getPrototypeOf.length === 1, "Object.getPrototypeOf.length = " + Object.getPrototypeOf.length);
  
      ok(Object.getPrototypeOf(new Object()) === Object.prototype,
         "Object.getPrototypeOf(new Object()) !== Object.prototype");
  
      function Constr() {}
      var obj = new Constr();
      ok(Object.getPrototypeOf(Constr.prototype) === Object.prototype,
         "Object.getPrototypeOf(Constr.prototype) !== Object.prototype");
      ok(Object.getPrototypeOf(obj) === Constr.prototype,
         "Object.getPrototypeOf(obj) !== Constr.prototype");
  
      var proto = new Object();
      Constr.prototype = proto;
      ok(Object.getPrototypeOf(obj) != proto,
         "Object.getPrototypeOf(obj) == proto");
      obj = new Constr();
      ok(Object.getPrototypeOf(obj) === proto,
         "Object.getPrototypeOf(obj) !== proto");
      ok(Object.getPrototypeOf(obj, 2, 3, 4) === proto,
         "Object.getPrototypeOf(obj) !== proto");
  
      ok(Object.getPrototypeOf(Object.prototype) === null,
         "Object.getPrototypeOf(Object.prototype) !== null");
  
      obj = Object.create(proto = { test: 1 });
      ok(Object.getPrototypeOf(obj) === proto,
         "Object.getPrototypeOf(obj) !== proto");
      ok(obj.test === 1, "obj.test = " + obj.test);
  
      obj = Object.create(null);
      ok(!("toString" in obj), "toString is in obj");
      ok(Object.getPrototypeOf(obj) === null, "Object.getPrototypeOf(obj) = " + Object.getPrototypeOf(obj));
  });
  
  sync_test("toString", function() {
      var tmp, obj;
  
      (function () { tmp = Object.prototype.toString.call(arguments); })();
      todo_wine.
      ok(tmp === "[object Arguments]", "toString.call(arguments) = " + tmp);
      tmp = Object.prototype.toString.call(this);
      todo_wine.
      ok(tmp === "[object Window]", "toString.call(null) = " + tmp);
      tmp = Object.prototype.toString.call(null);
      todo_wine.
      ok(tmp === "[object Null]", "toString.call(null) = " + tmp);
      tmp = Object.prototype.toString.call(undefined);
      todo_wine.
      ok(tmp === "[object Undefined]", "toString.call(undefined) = " + tmp);
      tmp = Object.prototype.toString.call();
      todo_wine.
      ok(tmp === "[object Undefined]", "toString.call() = " + tmp);
  
      obj = Object.create(null);
      tmp = Object.prototype.toString.call(obj);
      ok(tmp === "[object Object]", "toString.call(Object.create(null)) = " + tmp);
      obj = Object.create(Number.prototype);
      tmp = Object.prototype.toString.call(obj);
      ok(tmp === "[object Object]", "toString.call(Object.create(Number.prototype)) = " + tmp);
  });
  
  sync_test("bind", function() {
      var f, r;
      var o = new Object(), o2 = new Object();
  
      f = (function() {
          ok(this === o, "this != o");
          ok(arguments.length === 0, "arguments.length = " + arguments.length);
          return 1;
      }).bind(o);
      ok(f.length === 0, "f.length = " + f.length);
      r = f.call(o2);
      ok(r === 1, "r = " + r);
  
      f = (function() {
          ok(this === o, "this != o");
          ok(arguments.length === 1, "arguments.length = " + arguments.length);
          ok(arguments[0] === 1, "arguments[0] = " + arguments[0]);
          return 1;
      }).bind(o, 1);
      ok(f.length === 0, "f.length = " + f.length);
      r = f.call(o2);
      ok(r === 1, "r = " + r);
  
      f = (function() {
          ok(this === o, "this != o");
          ok(arguments.length === 2, "arguments.length = " + arguments.length);
          ok(arguments[0] === 1, "arguments[0] = " + arguments[0]);
          ok(arguments[1] === 2, "arguments[1] = " + arguments[0]);
          return 1;
      }).bind(o, 1);
      r = f.call(o2, 2);
      ok(r === 1, "r = " + r);
  
      o2.f = f;
      r = o2.f(2);
      ok(r === 1, "r = " + r);
  
      f = (function test(x, y, z) {
          ok(this === o, "this != o");
          ok(arguments.length === 2, "arguments.length = " + arguments.length);
          ok(x === 1, "x = " + x);
          ok(y === 2, "y = " + y);
          ok(z === undefined, "z = " + z);
          return 1;
      }).bind(o, 1);
      ok(f.length === 2, "f.length = " + f.length);
      r = f.call(o2, 2);
      ok(r === 1, "r = " + r);
      ok(f.toString() === "\nfunction() {\n    [native code]\n}\n", "f.toString() = " + f.toString());
      ok(!("prototype" in f), "bound function has prototype");
  
      var a = [];
      f = Array.prototype.push.bind(a, 1);
      f();
      ok(a.length === 1, "a.length = " + a.length);
      f(2);
      ok(a.length === 3, "a.length = " + a.length);
      ok(f.length === 0, "f.length = " + f.length);
      ok(f.toString() === "\nfunction() {\n    [native code]\n}\n", "f.toString() = " + f.toString());
      ok(a.toString() === "1,1,2", "a = " + a);
      f.call([], 3);
      ok(a.toString() === "1,1,2,1,3", "a = " + a);
  
      f = (function() { return this; }).bind(a);
      ok(f() === a, "f() != a");
  
      f = (function() { return this; }).bind(null);
      ok(f() === window, "f() = " + f());
  
      var t;
      f = (function() { return t = this; }).bind(a);
      ok(new f() === t, "new f() != a");
      ok(typeof(t) === "object", "typeof(t) = " + typeof(t));
      ok(t != a, "t == a");
  
      ok(Function.prototype.bind.length === 1, "Function.prototype.bind.length = " + Function.prototype.bind.length);
  });
  
  sync_test("keys", function() {
      var o = { a: 1, b: 2, c: 3 };
      var keys = Object.keys(o).sort().join();
      ok(keys === "a,b,c", "keys = " + keys);
  
      o = Object.create(o);
      keys = Object.keys(o).sort().join();
      ok(keys === "", "keys = " + keys);
  
      o.test = 1;
      keys = Object.keys(o).sort().join();
      ok(keys === "test", "keys = " + keys);
  
      Object.defineProperty(o, "defined", { value: 3, enumerable: false });
      keys = Object.keys(o).sort().join();
      ok(keys === "test", "keys = " + keys);
  
      keys = Object.keys([]).sort().join();
      ok(keys === "", "keys([]) = " + keys);
  
      ok(Object.keys.length === 1, "Object.keys.length = " + Object.keys.length);
  });
  
  sync_test("getOwnPropertyNames", function() {
      var o = { a: 1, b: 2, c: 3 };
      var names = Object.getOwnPropertyNames(o).sort().join();
      ok(names === "a,b,c", "names = " + names);
  
      o = Object.create(o);
      names = Object.getOwnPropertyNames(o).sort().join();
      ok(names === "", "names = " + names);
  
      o.test = 1;
      names = Object.getOwnPropertyNames(o).sort().join();
      ok(names === "test", "names = " + names);
  
      Object.defineProperty(o, "defined", { value: 3, enumerable: false });
      names = Object.getOwnPropertyNames(o).sort().join();
      ok(names === "defined,test", "names = " + names);
  
      names = Object.getOwnPropertyNames([]).sort().join();
      todo_wine.
      ok(names === "length", "names = " + names);
  
      ok(Object.getOwnPropertyNames.length === 1, "Object.getOwnPropertyNames.length = " + Object.getOwnPropertyNames.length);
  });
  
  sync_test("reduce", function() {
      var r, array;
  
      r = [1,2,3].reduce(function(a, value) { return a + value + 10; });
      ok(r === 26, "reduce() returned " + r);
  
      r = [1,2,3].reduce(function(a, value) { return a + value + 10; }, 1);
      ok(r === 37, "reduce() returned " + r);
  
      r = [1,2,3].reduce(function(a, value) { return a + value; }, "str");
      ok(r === "str123", "reduce() returned " + r);
  
      array = [1,2,3];
      r = array.reduce(function(a, value, index, src) {
          ok(src === array, "src != array");
          return a + "(" + index + "," + value + ")";
      }, "str");
      ok(r === "str(0,1)(1,2)(2,3)", "reduce() returned " + r);
  
      r = [1,2,3].reduce(function(a, value, index, src) {
          src[0] = false;
          delete src[1];
          src[2] = "test";
          return a + value;
      }, "");
      ok(r === "1test", "reduce() returned " + r);
  
      r = [1].reduce(function(a) { return 0; });
      ok(r === 1, "[1].reduce() returned " + r);
  
      r = [1].reduce(function(a) { return 0; }, 2);
      ok(r === 0, "[1].reduce(2) returned " + r);
  
      r = [].reduce(function(a) { return 0; }, 2);
      ok(r === 2, "[].reduce(2) returned " + r);
  
      r = [].reduce(function(a) { return 0; }, undefined);
      ok(r === undefined, "[].reduce(undefined) returned " + r);
  
      try {
          [].reduce(function(a) { return 0; });
          ok(false, "expected exception");
      }catch(e) {}
  
      ok(Array.prototype.reduce.length === 1, "Array.prototype.reduce.length = " + Array.prototype.reduce.length);
  });
  
  sync_test("preventExtensions", function() {
      var o = {};
      var r = Object.preventExtensions(o);
      ok(r === o, "r != o");
      o.x = 1;
      ok(!("x" in o), "x property added to o");
      try {
          Object.defineProperty(o, "y", { value: true });
          ok(false, "expected exception");
      }catch(e) {
          ok(e.name === "TypeError", "got " + e.name + " exception");
      }
  
      r = Object.preventExtensions(o);
      ok(r === o, "r != o");
      r = Object.isExtensible(o);
      ok(r === false, "isExtensible(o) returned " + r);
  
      function Constr() {}
      o = Object.preventExtensions(new Constr());
      Constr.prototype.prop = 1;
      ok(o.prop === 1, "o.prop = " + o.prop);
      o.prop = 2;
      ok(o.prop === 1, "o.prop = " + o.prop);
      r = Object.isExtensible(o);
      ok(r === false, "isExtensible(o) returned " + r);
  
      r = Object.isExtensible({});
      ok(r === true, "isExtensible(o) returned " + r);
  
      try {
          Object.isExtensible(1);
          ok(false, "exception expected");
      }catch(e) {
          ok(e.name === "TypeError", "got " + e.name + " exception");
      }
  
      o = [];
      Object.preventExtensions(o);
      try {
          o.push(1);
          ok(false, "exception expected on o.push");
      }catch(e) {
          ok(e.name === "TypeError", "got " + e.name + " exception");
      }
      ok(!("0" in o), "0 is in o");
      ok(o.length === 0, "o.length = " + o.length);
  
      o = [1];
      Object.preventExtensions(o);
      o.pop();
      ok(!("0" in o), "0 is in o");
      ok(o.length === 0, "o.length = " + o.length);
  
      ok(Object.preventExtensions.length === 1, "Object.preventExtensions.length = " + Object.preventExtensions.length);
      ok(Object.isExtensible.length === 1, "Object.isExtensible.length = " + Object.isExtensible.length);
  });
  
  sync_test("freeze", function() {
      ok(Object.freeze.length === 1, "Object.freeze.length = " + Object.freeze.length);
      try {
          Object.freeze(1);
          ok(false, "exception expected");
      }catch(e) {
          ok(e.name === "TypeError", "got " + e.name + " exception");
      }
  
      function f() {}
  
      var o = {}, r;
      o.prop = 1;
      o.func = f;
      Object.defineProperty(o, "accprop", {
          get: function() {
              return r;
          },
          set: function(v) {
              r = v;
          }
      });
  
      test_own_data_prop_desc(o, "prop", true, true, true);
      r = Object.freeze(o);
      ok(r === o, "r != o");
      test_own_data_prop_desc(o, "prop", false, true, false);
      test_own_data_prop_desc(o, "func", false, true, false);
      ok(!Object.isExtensible(o), "o is still extensible");
      o.prop = false;
      o.func = false;
      ok(o.prop === 1, "o.prop = " + o.prop);
      ok(o.func === f, "o.func = " + o.func);
  
      r = 1;
      o.accprop = 2;
      ok(r === 2, "r = " + r);
      r = 3;
      ok(o.accprop === 3, "o.accprop = " + o.accprop);
  
      o = [1];
      Object.freeze(o);
      try {
          o.pop();
          ok(false, "exception expected on o.pop");
      }catch(e) {
          ok(e.name === "TypeError", "got " + e.name + " exception");
      }
      ok(o[0] === 1, "o[0] = " + o[0]);
      ok(o.length === 1, "o.length = " + o.length);
  });
  
  sync_test("seal", function() {
      ok(Object.seal.length === 1, "Object.seal.length = " + Object.seal.length);
      try {
          Object.seal(1);
          ok(false, "exception expected");
      }catch(e) {
          ok(e.name === "TypeError", "got " + e.name + " exception");
      }
  
      function f() {}
  
      var o = {}, r;
      o.prop = 1;
      o.func = f;
      Object.defineProperty(o, "accprop", {
          get: function() {
              return r;
          },
          set: function(v) {
              r = v;
          }
      });
  
      test_own_data_prop_desc(o, "prop", true, true, true);
      r = Object.seal(o);
      ok(r === o, "r != o");
      test_own_data_prop_desc(o, "prop", true, true, false);
      test_own_data_prop_desc(o, "func", true, true, false);
      ok(!Object.isExtensible(o), "o is still extensible");
      o.prop = false;
      o.func = false;
      ok(o.prop === false, "o.prop = " + o.prop);
      ok(o.func === false, "o.func = " + o.func);
  
      r = 1;
      o.accprop = 2;
      ok(r === 2, "r = " + r);
      r = 3;
      ok(o.accprop === 3, "o.accprop = " + o.accprop);
  
      o = [1];
      Object.seal(o);
      try {
          o.pop();
         ok(false, "exception expected on o.pop");
      }catch(e) {
          ok(e.name === "TypeError", "got " + e.name + " exception");
      }
      ok(o[0] === 1, "o[0] = " + o[0]);
      ok(o.length === 1, "o.length = " + o.length);
  });
  
  sync_test("isFrozen", function() {
      ok(Object.isFrozen.length === 1, "Object.isFrozen.length = " + Object.isFrozen.length);
      ok(Object.isSealed.length === 1, "Object.isSealed.length = " + Object.isSealed.length);
  
      var o = Object.freeze({});
      ok(Object.isFrozen(o) === true, "o is not frozen");
      ok(Object.isSealed(o) === true, "o is not sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      ok(Object.isFrozen({}) === false, "{} is frozen");
      ok(Object.isSealed({}) === false, "{} is sealed");
  
      o = Object.preventExtensions({});
      ok(Object.isFrozen(o) === true, "o is not frozen");
      ok(Object.isSealed(o) === true, "o is not sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = Object.preventExtensions({ prop: 1 });
      ok(Object.isFrozen(o) === false, "o is frozen");
      ok(Object.isSealed(o) === false, "o is sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = Object.freeze({ prop: 1 });
      ok(Object.isFrozen(o) === true, "o is not frozen");
      ok(Object.isSealed(o) === true, "o is not sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = Object.seal({ prop: 1 });
      ok(Object.isFrozen(o) === false, "o is frozen");
      ok(Object.isSealed(o) === true, "o is not sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = {};
      Object.defineProperty(o, "prop", { value: 1 });
      Object.preventExtensions(o);
      ok(Object.isFrozen(o) === true, "o is not frozen");
      ok(Object.isSealed(o) === true, "o is not sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = {};
      Object.defineProperty(o, "prop", { value: 1, writable: true });
      Object.preventExtensions(o);
      ok(Object.isFrozen(o) === false, "o is frozen");
      ok(Object.isSealed(o) === true, "o is not sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = {};
      Object.defineProperty(o, "prop", { value: 1, writable: true, configurable: true });
      Object.preventExtensions(o);
      ok(Object.isFrozen(o) === false, "o is frozen");
      ok(Object.isSealed(o) === false, "o is sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = {};
      Object.defineProperty(o, "prop", { value: 1, configurable: true });
      Object.preventExtensions(o);
      ok(Object.isFrozen(o) === false, "o is frozen");
      ok(Object.isSealed(o) === false, "o is sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  
      o = {};
      Object.defineProperty(o, "prop", { get: function() {}, set: function() {} });
      Object.preventExtensions(o);
      ok(Object.isFrozen(o) === true, "o is not frozen");
      ok(Object.isSealed(o) === true, "o is not sealed");
      ok(Object.isExtensible(o) === false, "o is extensible");
  });
  
  sync_test("head_setter", function() {
      document.head = "";
      ok(typeof(document.head) === "object", "typeof(document.head) = " + typeof(document.head));
  });
  
  
  sync_test("declaration_let", function() {
      ok(typeof(func) === "undefined", "typeof(func)  = " + typeof(func));
      with(new Object()) {
          var x = false && function func() {};
      }
      ok(typeof(func) === "undefined", "typeof(func)  = " + typeof(func));
  
      function expect_exception(func, todo) {
          try {
              func();
          }catch(e) {
              return;
          }
          if (typeof todo === 'undefined' || !todo)
              ok(false, "expected exception");
          else
              todo_wine.ok(false, "expected exception");
      }
  
      function call_func(f, expected_a)
      {
          f(2, expected_a);
      }
  
      ok(a === undefined, "a is not undefined");
      var a = 3;
  
      {
          let a = 2;
          let b
  
          ok(typeof b === 'undefined', "b is defined");
          ok(b === undefined, "b !== undefined");
  
          ok(a == 2, "a != 2");
  
          a = 4;
          ok(a == 4, "a != 4");
  
          eval('ok(a == 4, "eval: a != 4"); b = a; a = 5;')
          ok(b == 4, "b != 4");
          ok(a == 5, "a != 5");
  
          function func1()
          {
              ok(typeof b === 'undefined', "func1: b is defined");
              ok(b === undefined, "func1: should produce exception");
              let b = 1;
          }
          expect_exception(func1, true);
  
          function func2()
          {
              let b = 1;
              ok(b == 1, "func2: b != 1");
          }
          func2();
  
          var w = 8;
          with({w: 9})
          {
              {
                  let c = 5
  
                  function func3(b, expected)
                  {
                      var b = 2
  
                      ok(typeof d === 'undefined', "d is defined");
  
                      ok(c == expected, "func3: c != expected");
                      ok(w == 9, "w != 9")
                      ok(b == 2, "func3: b != 2");
                      b = 3;
                      ok(b == 3, "func3: b != 3");
                      ok(a == expected, "func3: a != expected");
                      a = 6;
                      c = 6;
                  }
  
                  let f3 = func3
                  let f4 = function()
                      {
                          ok(a == 6, "f4: a != 6");
                      }
  
                  ok(a == 5, "tmp 2 a != 5");
                  ok(c == 5, "c != 5");
                  func3(1, 5)
                  ok(c == 6, "c != 6");
                  call_func(func3, 6);
                  f3(1, 6)
                  ok(a == 6, "a != 6");
                  ok(b == 4, "b != 4");
                  ok(c == 6, "c != 6");
  
                  call_func(f4);
                  f4();
              }
          }
          {
              let c = 4;
              let d = 1;
  
              func3(1, 6);
          }
      }
  
      ok(a == 3, "a != 3");
  });
  
  sync_test("let scope instances", function() {
      var a = [], i;
      for(i = 0; i < 3; i++) {
          a[i] = function() { return v; };
          let v = i;
      }
      for(i = 0; i < 3; i++)
          ok(a[i]() == i, "a[" + i + "]() = " + a[i]());
  
      ok(typeof f == 'undefined', "f is defined");
  
      for(i = 0; i < 3; i++) {
          function f() { return v; }
          a[i] = f;
          let v = i;
      }
      for(i = 0; i < 3; i++)
          ok(a[i]() == i, "a[" + i + "]() = " + a[i]());
  
      ok(f() == 2, "f() = " + f());
  });
  
  sync_test("functions scope", function() {
      function f(){ return 1; }
      function f(){ return 2; }
  
      var f0 = f, f1, f2, f3, i, o, a = [];
      ok(f0() === 2, "f0() = " + f0());
  
      {
          f1 = f;
          function f() { return 3; }
          ok(f1 === f, "f1 != f");
          ok(f0 != f1, "f0 == f1");
      }
      ok(f === f1, "f != f1");
  
      for(i = 0; i < 3; i++) {
          a[i] = f;
          function f() {}
          ok(f === a[i], "f != a[i]");
      }
      ok(a[0] != a[1], "a[0] == a[1]");
      ok(a[1] != a[2], "a[1] == a[2]");
      ok(f === a[2], "f != a[2]");
  
      {
          f2 = f;
          ok(f() === 4, "f() = " + f());
          function f() { return 4; }
  
          {
              f3 = f;
              ok(f() === 5, "f() = " + f());
              function f() { return 5;}
          }
          ok(f() === 4, "f() = " + f());
          ok(f === f2, "f != f2");
      }
      ok(f === f3, "f != f3");
  
      with(o = {f: 1}) {
          ok(f === 1, "f != 1");
          {
              ok(f() === 6, "f() = " + f());
              function f() { return 6; }
          }
          ok(f === 1, "f != 1");
          delete o.f;
          ok(f() === 6, "f() = " + f());
      }
  
      if(false) {
          function f() { throw "unexpected call"; }
      }
      ok(f() === 6, "f() = " + f());
  
      /* 'with' has no effect for function defined in a single statement context. */
      let w = 8;
      with({w:10, value:11})
          function with_function()
          {
              var except
  
              ok(w == 8, "w != 8");
              except = false;
              try
              {
                  ok(value === undefined, "value is defined");
              }
              catch(e)
              {
                  except = true;
              }
              ok(except, "with_function: expected exception");
  
              let ret = w;
              w = 9;
              return ret;
          }
      val = with_function();
      ok(val == 8, "val != 8");
      ok(w == 9, "w != 9");
  });
  