third_party/WebKit/LayoutTests/fast/js/dfg-arguments-alias-activation.html

   1 <p>This tests verifies access to captured arguments via an optimized-away arguments object.
   2 </p>
   3 <pre id="console"></pre>
   4
   5 <script>
   6 function log(s)
   7 {
   8         document.getElementById("console").appendChild(document.createTextNode(s + "\r\n"));
   9 }
  10
  11 function shouldBe(a, aDescription, b)
  12 {
  13         if (a == b) {
  14                 log("PASS: " + aDescription + " should be " + b + " and is.");
  15                 return;
  16         }
  17         log("FAIL: " + aDescription + " should be " + b + " but instead is " + a + ".");
  18 }
  19
  20 if (window.testRunner) {
  21         testRunner.dumpAsText();
  22 }
  23
  24 // In-bounds of declared and passed arguments, no activation, before tear-off.
  25 function f0(x) {
  26     return arguments[0] || function() { return x; };
  27 }
  28
  29 // Out-of-bounds of declared arguments, in-bounds of passed arguments, no activation, before tear-off.
  30 function f1(x) {
  31     return arguments[1] || function() { return x; };
  32 }
  33
  34 // In-bounds of declared arguments, in-bounds of passed arguments, yes activation, before tear-off.
  35 function f2(x) {
  36     return function() { return x; } && arguments[0];
  37 }
  38
  39 // Out-of-bounds of declared arguments, in-bounds of passed arguments, yes activation, before tear-off.
  40 function f3(x) {
  41     return function() { return x; } && arguments[1];
  42 }
  43
  44 // In-bounds of declared and passed arguments, no activation, after tear-off.
  45 function f4(x) {
  46     return arguments || function() { return x; };
  47 }
  48
  49 // Out-of-bounds of declared arguments, in-bounds of passed arguments, no activation, after tear-off.
  50 function f5(x) {
  51     return arguments || function() { return x; };
  52 }
  53
  54 // In-bounds of declared arguments, in-bounds of passed arguments, yes activation, after tear-off.
  55 function f6(x) {
  56     return function() { return x; } && arguments;
  57 }
  58
  59 // Out-of-bounds of declared arguments, in-bounds of passed arguments, yes activation, after tear-off.
  60 function f7(x) {
  61     return function() { return x; } && arguments;
  62 }
  63
  64 for (var i = 0; i < 200; ++i) {
  65     shouldBe(f0(1), "f0(1)", 1);
  66     shouldBe(f1(2, 3), "f1(2, 3)", 3);
  67     shouldBe(f2(4), "f2(4)", 4);
  68     shouldBe(f3(5, 6), "f3(5, 6)", 6);
  69     shouldBe(f4(7)[0], "f4(7)", 7);
  70     shouldBe(f5(8, 9)[1], "f5(8, 9)", 9);
  71     shouldBe(f6(10)[0], "f6(10)", 10);
  72     shouldBe(f7(11, 12)[1], "f7(11, 12)", 12);
  73 }
  74 </script>