splice-delete-non-configurable-during-shrink.js

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/* Test that splice causing deletion of a non-configurable property stops at exactly step 12(v) of ES5 15.4.4.12 */

var O = [1,2,3,4,5,6];

var A = undefined;

Object.defineProperty(O, 3, { configurable: false });

try

  A = O.splice(0, 6);

  throw new Error("didn't throw, returned " + A);

catch (e)

  assertEq(e instanceof TypeError, true,

           "deleting O[3] should have caused a TypeError");

assertEq(O.length, 6); // setting length not reached

assertEq(A, undefined); // return value not reached

assertEq(O[5], undefined); // deletion reached

assertEq(O[4], undefined); // deletion reached

assertEq(O[3], 4); // deletion caused exception

assertEq(O[2], 3); // deletion not reached

assertEq(O[1], 2); // deletion not reached

assertEq(O[0], 1); // deletion not reached