third_party/WebKit/LayoutTests/fast/js/eval-overriding.html

   1 <p>This page verifies that eval can be overridden.</p>
   2 <p>If the test passes, you'll see a series of pass messages below.</p>
   3 <pre id="console"></pre>
   4 <hr>
   5
   6 <script>
   7 if (window.testRunner)
   8     testRunner.dumpAsText();
   9
  10 var x = "built-in eval";
  11
  12 function log(s)
  13 {
  14     document.getElementById("console").appendChild(document.createTextNode(s + "\n"));
  15 }
  16
  17 function shouldBe(aDescription, a, b)
  18 {
  19     if (a === b) {
  20         log("PASS: " + aDescription + " should be " + b + " and is.");
  21     } else {
  22         log("FAIL: " + aDescription + " should be " + b + " but instead is " + a + ".");
  23     }
  24 }
  25
  26 // Test overriding eval in global scope
  27 eval = function() { return "global-scope eval override"; }
  28 shouldBe('eval("x")', eval("x"), "global-scope eval override");
  29
  30 // Test overriding eval using "with"
  31 with ({ eval: function() { return "with-scope eval override"; }}) {
  32     shouldBe('eval("x")', eval("x"), "with-scope eval override");
  33 }
  34
  35 // Test overriding eval using "catch"
  36 try {
  37     throw function() { return "catch-scope eval override"; };
  38 } catch(eval) {
  39     shouldBe('eval("x")', eval("x"), "catch-scope eval override");
  40 }
  41
  42 // Test overriding eval using locally declared function
  43 (function()
  44 {
  45     function eval() { return "local-scope eval override"; }
  46     shouldBe('eval("x")', eval("x"), "local-scope eval override");
  47 })()
  48 </script>