| 0,1,2,3 |
| 1,2,3 |
| 1,2,3 |
| 4 |
| 0,1,2,3 |
| a,b,c,0,1,2,3 |
| 1 |
| 1 |
| 2 |
| 2 |
| 1 |
| 3 |
| undefined |
| 0 |
| 3 |
| 2 |
| 4 |
| 5 |
| 5 |
| 5 |
| 6 |
| 7 |
| 2 |
| 3 |
| undefined |
| undefined |
| 0 |
| 3 |
| 3 |
| 3 |
| --- unshift 0 |
| 3 |
| 100,101,102 |
| --- unshift 1 |
| RangeError : Array length must be assigned a finite positive integer |
| length: 4294967295 |
| 0: 200 |
| 1: 201 |
| 2: 202 |
| 3: 203 |
| 4294967294: 100 |
| 4294967295: 101 |
| 4294967296: 102 |
| 4294967298: 104 |
| 4294967299: 109 |
| Test: unshift should throw when length is not writable. |
| e instanceOf TypeError = true |
| a.length = 1 |
| ary.length = 18 |
| arr.length = 6 |
| Overridden unshift |
| Overridden unshift |
| Overridden unshift |
| Overridden unshift |
| Overridden unshift |
| 2 |
| 4 |
| Overridden unshift |
| 5 |
| 1,d,e |
