JSTests/ChakraCore/test/Object/objectCreateNull.js

//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------

if (this.WScript && this.WScript.LoadScriptFile) { // Check for running in ch
  this.WScript.LoadScriptFile("..\\UnitTestFramework\\UnitTestFramework.js");
}

var tests = [
  {
    name : "NullTypeHandler basic functionality and sanity checks",
    body : function() {
      var objects = [
                     Object.create({}),
                     new Boolean(),
                     Object.create(Promise.prototype),
                     Function(""),
                     new Number(),
                     new String()
                     ];
      
      for (var i = 1; i < objects.length; ++i) {
        var o = objects[i];

        assert.areEqual(undefined, o[0], "NullTypeHandler object with no properties returns undefined");
        assert.isFalse(o.hasOwnProperty('0'), "NullTypeHandler object with no properties returns false for hasOwnProperty");
        assert.isFalse(o.propertyIsEnumerable('0'), "NullTypeHandler object with no properties returns false for propertyIsEnumerable");
        
        for (var a in o) {
          assert.fail("Enumerating an empty object"); // Unreachable
        }

        o[0] = "str";

        assert.areEqual("str", o[0], "NullTypeHandler object with index property returns property correctly");
        assert.areEqual("str", o['0'], "NullTypeHandler object with index property returns property correctly");
        assert.isTrue(o.hasOwnProperty('0'), "NullTypeHandler object with index property returns true for hasOwnProperty");
        assert.isTrue(o.propertyIsEnumerable('0'), "NullTypeHandler object with index property returns true for propertyIsEnumerable");
  
        delete o[0];

        assert.areEqual(undefined, o[0], "NullTypeHandler objectwith deleted property returns undefined");
        assert.areEqual(undefined, o['0'], "NullTypeHandler objectwith deleted property returns undefined");
        assert.isFalse(o.hasOwnProperty('0'), "NullTypeHandler object with deleted property returns false for hasOwnProperty");
        assert.isFalse(o.propertyIsEnumerable('0'), "NullTypeHandler object with deleted property returns false for propertyIsEnumerable");
        
        for (var a in o) {
          assert.fail("Enumerating an empty object"); // Unreachable
        }

        o[0] = "str2";

        assert.areEqual("str2", o[0], "NullTypeHandler object with readded index property returns property correctly");
        assert.areEqual("str2", o['0'], "NullTypeHandler object with readded index property returns property correctly");
        assert.isTrue(o.hasOwnProperty('0'), "NullTypeHandler object with readded index property returns true for hasOwnProperty");
        assert.isTrue(o.propertyIsEnumerable('0'), "NullTypeHandler object readded with index property returns true for propertyIsEnumerable");
    }
    }
  },
  {
    name: "NullTypeHandler enumeration",
    body: function () {
      var obj1 = Object.create({});
      var obj2 = Object.create(null);
      var numProperties = 3;

      
      for (var i = 0; i < numProperties; ++i)
      {
        obj1[i] = i;
        assert.areEqual(obj1[i], i, "NullTypeHandler first enumeration object with index " + i + " equal to " + i);
        assert.isTrue(obj1.hasOwnProperty(i), "NullTypeHandler first enumeration object with index " + i + " returns true for hasOwnProperty");
        assert.isTrue(obj1.propertyIsEnumerable(i), "NullTypeHandler object first enumeration with index " + i + " returns true for propertyIsEnumerable");

        obj2[i] = i;
        assert.areEqual(obj2[i], i, "NullTypeHandler second enumeration object with index " + i + " equal to " + i);
        assert.isTrue(Object.prototype.hasOwnProperty.call(obj2, i), "NullTypeHandler first enumeration object with index " + i + " returns true for hasOwnProperty");
        assert.isTrue(Object.prototype.propertyIsEnumerable.call(obj2, i), "NullTypeHandler object first enumeration with index " + i + " returns true for propertyIsEnumerable");
      }

      var j = 0;
      for (var k in obj1)
      {
        ++j;
      }
      assert.areEqual(j, numProperties, "NullTypeHandler first enumeration object gives same number of properties");

      j = 0;
      for (var k in obj2)
      {
        ++j;
      }
      assert.areEqual(j, numProperties, "NullTypeHandler second enumeration object gives same number of properties");
    }
  }
];

testRunner.runTests(tests, { verbose : WScript.Arguments[0] != "summary" });