third_party/WebKit/LayoutTests/fast/js/script-tests/prefix-syntax.js

   1 description(
   2 "This test checks whether various forms of preincrement expression are allowed."
   3 );
   4
   5 var x = 0;
   6 var y = 0;
   7
   8 shouldBe('++x', '1');
   9 shouldBe('++window.x', '2');
  10 shouldBe('++window["x"]', '3');
  11 shouldBe('++(x)', '4');
  12 shouldBe('++(window.x)', '5');
  13 shouldBe('++(window["x"])', '6');
  14 shouldBe('(y, ++x)', '7');
  15 shouldBe('++((x))', '8');
  16 shouldBe('++((window.x))', '9');
  17 shouldBe('++((window["x"]))', '10');
  18
  19 shouldThrow('++(y, x)');
  20 shouldThrow('++(true ? x : y)');
  21 shouldThrow('++++x');