third_party/WebKit/LayoutTests/fast/js/exception-thrown-from-eval-inside-closure.html

   1 <p>This page tests whether an exception thrown from an eval inside a closure
   2 prematurely tears off the closure's activation.
   3 </p>
   4 <p>If the test passes, you'll see a PASS message below.
   5 </p>
   6 <pre id="console"></pre>
   7
   8 <script>
   9 function log(s)
  10 {
  11     document.getElementById("console").appendChild(document.createTextNode(s + "\n"));
  12 }
  13
  14 function shouldBe(aDescription, a, b)
  15 {
  16     if (a === b) {
  17         log("PASS: " + aDescription + " should be " + b + " and is.");
  18     } else {
  19         log("FAIL: " + aDescription + " should be " + b + " but instead is " + a + ".");
  20     }
  21 }
  22
  23 if (window.testRunner)
  24     testRunner.dumpAsText();
  25
  26 // Create a function with an activation.
  27 (function () {
  28     var x = 1;
  29
  30     // Throw an exception inside an eval that requires a full scope chain.
  31     try {
  32         eval("(function () { throw 'exception'; })()");
  33     } catch(e) {
  34     }
  35
  36     // Set "x" by resolving through the activation.
  37     (function () {
  38         x = 2;
  39     })();
  40
  41     // Test the local register for "x", which should have been set to 2 above.
  42     shouldBe("x", x, 2);
  43 }());
  44 </script>