The Tor Browser / file revision

 var x = [1,2.5,"three",true,false,null,[1,2,3],{a:0,b:1}];

 assertEq(String(x), "1,2.5,three,true,false,,1,2,3,[object Object]");

 assertEq(x.length, 8);

 assertEq(x[7].a, 0);

 assertEq(x[7].b, 1);

 var y = {a:0,a:1,a:2};

 assertEq(y.a,2);

 var z = {a:0,b:1,__proto__:{c:2,d:3}};

 assertEq(z.a,0);

 assertEq(z.b,1);

 assertEq(z.c,2);

 assertEq(z.d,3);

 function foo() {

   var q = eval("[1,2,3]");

   var r = eval("[1,2,3]");

   assertEq(q === r, false);

 }

 foo();

 var q = {0x4fffffff: 0, 0x7fffffff: 1, 0xffffffff: 2};

 assertEq(q[1342177279], 0);

 assertEq(q[2147483647], 1);

 assertEq(q[4294967295], 2);

 try {

   [1,2,3,{a:0,b:1}].foo.bar;

 } catch (e) { assertEq(e.message.search("\.foo is undefined") != -1, true); }

 var a = [1 + 1, 3 * 2, 6 - 5, 14 % 6, 15 / 5, 1 << 3, 

          8 >> 2, 5 | 2, 5 ^ 3, ~3, -3,"a" + "b",  !true, !false];

 assertEq(String(a), "2,6,1,2,3,8,2,7,6,-4,-3,ab,false,true");

 assertEq(a.length, 14);

 var b = {

     a: 1 + 1,

     b: 3 * 2,

     c: 6 - 5,

     d: 14 % 6,

     e: 15 / 5,

     f: 1 << 3,

     g: 8 >> 2,

     h: 5 | 2,

     i: 5 ^ 3,

     j: ~3,

     k: -3,

     l: "a" + "b",

     m: !true,

     n: !false,

 }

 var char = "a".charCodeAt(0);

 for (var i = 0; i < a.length; i++) {

     assertEq(b[String.fromCharCode(char)], a[i]);

     char++;

 }