js/xpconnect/tests/chrome/test_scripterror.html

   1 <!DOCTYPE html>
   2 <meta charset=utf-8>
   3 <title>Tests for nsIScriptError</title>
   4 <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
   5 <div id="log"></div>
   6 <script>
   7 function awaitScriptError(fun) {
   8   // Use setTimeout in order to prevent throwing from test frame
   9   // and to have a clean stack frame.
  10   setTimeout(fun, 0)
  11
  12   return new Promise(resolve => {
  13     const observer = {
  14       QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
  15       observe(message) {
  16         if (!(message instanceof Ci.nsIScriptError)) {
  17           return;
  18         }
  19
  20         Services.console.unregisterListener(observer);
  21         resolve(message);
  22       }
  23     };
  24
  25     Services.console.registerListener(observer);
  26   });
  27 }
  28
  29 function hasExpectedProperties(message, exception) {
  30   is(message.hasException, true, "has exception");
  31   is(message.exception, exception, "has correct exception");
  32
  33   ok(message.stack != null, "has stack");
  34   is(message.stack?.source, location.href, "correct stack source")
  35
  36   is(message.sourceName, location.href, "has correct sourceName/filename");
  37   ok(message.lineNumber > 0, "has lineNumber");
  38
  39   is(message.innerWindowID, window.windowGlobalChild.innerWindowId,
  40      "correct innerWindowID");
  41 }
  42
  43 add_task(async () => {
  44   await SpecialPowers.pushPrefEnv({"set": [
  45     ["javascript.options.asyncstack_capture_debuggee_only", false],
  46   ]});
  47
  48   const TESTS = [
  49     "abc",
  50     new Error("foobar"),
  51     {foo: "bar"}
  52   ];
  53
  54   for (let test of TESTS) {
  55     // First test as regular throw
  56     SimpleTest.expectUncaughtException();
  57     let message = await awaitScriptError(function testName() {
  58         throw test;
  59     });
  60     hasExpectedProperties(message, test);
  61     is(message.isPromiseRejection, false, "not a rejected promise");
  62
  63     // Now test as uncaught promise rejection
  64     message = await awaitScriptError(function testName() {
  65         Promise.reject(test);
  66     });
  67     hasExpectedProperties(message, test);
  68     is(message.isPromiseRejection, true, "is a rejected promise");
  69
  70     // Uncaught rejection from async function
  71     message = await awaitScriptError(async function testName() {
  72         throw test;
  73     });
  74     hasExpectedProperties(message, test);
  75     is(message.isPromiseRejection, true, "is a rejected promise");
  76
  77     // Uncaught rejection from then callback
  78     message = await awaitScriptError(async function testName() {
  79         Promise.resolve().then(() => {
  80           throw test;
  81         });
  82     });
  83     hasExpectedProperties(message, test);
  84     is(message.isPromiseRejection, true, "is a rejected promise");
  85   }
  86 });
  87 </script>