test/mjsunit/array-push.js

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// Check pushes with various number of arguments.
(function() {
  var a = [];
  for (var i = 0; i < 7; i++) {
    a = [];

    assertEquals(0, a.push());
    assertEquals([], a, "after .push()");

    assertEquals(1, a.push(1), "length after .push(1)");
    assertEquals([1], a, "after .push(1)");

    assertEquals(3, a.push(2, 3), "length after .push(2, 3)");
    assertEquals([1, 2, 3], a, "after .push(2, 3)");

    assertEquals(6, a.push(4, 5, 6),
      "length after .push(4, 5, 6)");
    assertEquals([1, 2, 3, 4, 5, 6], a,
      "after .push(4, 5, 5)");

    assertEquals(10, a.push(7, 8, 9, 10),
      "length after .push(7, 8, 9, 10)");
    assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], a,
      "after .push(7, 8, 9, 10)");

    assertEquals(15, a.push(11, 12, 13, 14, 15),
      "length after .push(11, 12, 13, 14, 15)");
    assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15], a,
      "after .push(11, 12, 13, 14, 15)");

    assertEquals(21, a.push(16, 17, 18, 19, 20, 21),
      "length after .push(16, 17, 18, 19, 20, 21)");
    assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21], a,
      "after .push(16, 17, 18, 19, 20, 21)");

    assertEquals(28, a.push(22, 23, 24, 25, 26, 27, 28),
      "length hafter .push(22, 23, 24, 25, 26, 27, 28)");
    assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28], a,
      "after .push(22, 23, 24, 25, 26, 27, 28)");
  }
})();

// Excerises various pushes to the array at the end of new space.
(function() {
  var a = undefined;
  for (var i = 0; i < 7; i++) {
    a = [];
    assertEquals(1, a.push(1));
    assertEquals(2, a.push(2));
    assertEquals(3, a.push(3));
    assertEquals(4, a.push(4));
    assertEquals(5, a.push(5));
    assertEquals(6, a.push(6));
    assertEquals(7, a.push(7));
    assertEquals(8, a.push(8));
    assertEquals(9, a.push(9));
    assertEquals(10, a.push(10));
    assertEquals(11, a.push(11));
    assertEquals(12, a.push(12));
    assertEquals(13, a.push(13));
    assertEquals(14, a.push(14));
    assertEquals(15, a.push(15));
    assertEquals(16, a.push(16));
    assertEquals(17, a.push(17));
    assertEquals(18, a.push(18));
    assertEquals(19, a.push(19));
    assertEquals(20, a.push(20));
    assertEquals(21, a.push(21));
    assertEquals(22, a.push(22));
    assertEquals(23, a.push(23));
    assertEquals(24, a.push(24));
    assertEquals(25, a.push(25));
    assertEquals(26, a.push(26));
    assertEquals(27, a.push(27));
    assertEquals(28, a.push(28));
    assertEquals(29, a.push(29));
  }
})();

// Test the case of not JSArray receiver.
// Regression test for custom call generators, see issue 684.
(function() {
  var x = {__proto__: []};
  for (var i = 0; i < 100; i++) {
    x.push("a");
    assertEquals(i + 1, x.length, i + 'th iteration');
  }
})();