v8/test/mjsunit/object-literal.js

// Copyright 2009 the V8 project authors. All rights reserved.
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var obj = {
    a: 7,
    b: { x: 12, y: 24 },
    c: 'Zebra'
}

assertEquals(7, obj.a);
assertEquals(12, obj.b.x);
assertEquals(24, obj.b.y);
assertEquals('Zebra', obj.c);

var z = 24;

var obj2 = {
    a: 7,
    b: { x: 12, y: z },
    c: 'Zebra'
}

assertEquals(7, obj2.a);
assertEquals(12, obj2.b.x);
assertEquals(24, obj2.b.y);
assertEquals('Zebra', obj2.c);

var arr = [];
for (var i = 0; i < 2; i++) {
  arr[i] = {
      a: 7,
      b: { x: 12, y: 24 },
      c: 'Zebra'
  }
}

arr[0].b.x = 2;
assertEquals(2, arr[0].b.x);
assertEquals(12, arr[1].b.x);


function makeSparseArray() {
  return {
    '0': { x: 12, y: 24 },
    '1000000': { x: 0, y: 0 }
  };
}

var sa1 = makeSparseArray();
sa1[0].x = 0;
var sa2 = makeSparseArray();
assertEquals(12, sa2[0].x);

// Test that non-constant literals work.
var n = new Object();

function makeNonConstantArray() { return [ [ n ] ]; }

var a = makeNonConstantArray();
a[0][0].foo = "bar";
assertEquals("bar", n.foo);

function makeNonConstantObject() { return { a: { b: n } }; }

a = makeNonConstantObject();
a.a.b.bar = "foo";
assertEquals("foo", n.bar);

// Test that exceptions for regexps still hold.
function makeRegexpInArray() { return [ [ /a*/, {} ] ]; }

a = makeRegexpInArray();
var b = makeRegexpInArray();
assertTrue(a[0][0] === b[0][0]);
assertFalse(a[0][1] === b[0][1]);

function makeRegexpInObject() { return { a: { b: /b*/, c: {} } }; }
a = makeRegexpInObject();
b = makeRegexpInObject();
assertTrue(a.a.b === b.a.b);
assertFalse(a.a.c === b.a.c);