Bug 1414706 - dump debug info immediately when a test times out. r=jya

For now we dump debug info when the whole test case finishes. However, it
would be harder to relate the debug info to the timed out test when there
are multiple test timeouts.

Note we don't call |this.finished(token)| until v.mozDumpDebugInfo() is done
because |this.finished(token)| might finish the whole test case and clean up
the page which might change the output of v.mozDumpDebugInfo().

MozReview-Commit-ID: BrdZ0EVpaBQ

--HG--
extra : rebase_source : ee5d20c3ab605568e7fe895f14b8e9468fffd5ab
extra : source : 1288e105a94ac05fc3a978b7287dd45ecdfb6e8d

dom/media/test/manifest.js

@@ -1630,8 +1630,6 @@ function MediaTestManager() {
   // Instead MediaTestManager will manage timeout of each test.
   SimpleTest.requestLongerTimeout(1000);
 
-  this.hasTimeout = false;
-
   // Return how many seconds elapsed since |begin|.
   function elapsedTime(begin) {
     var end = new Date();
@@ -1683,10 +1681,10 @@ function MediaTestManager() {
     this.numTestsRunning++;
     this.handlers[token] = handler;
 
-    var onTimeout = () => {
-      this.hasTimeout = true;
+    var onTimeout = async () => {
       ok(false, "Test timed out!");
       info(`${token} timed out!`);
+      await dumpDebugInfoForToken(token);
       this.finished(token);
     };
     // Default timeout to 180s for each test.
@@ -1752,9 +1750,6 @@ function MediaTestManager() {
       if (this.onFinished) {
         this.onFinished();
       }
-      if (this.hasTimeout) {
-        dumpDebugInfo();
-      }
       var onCleanup = () => {
         var end = new Date();
         SimpleTest.info("Finished at " + end + " (" + (end.getTime() / 1000) + "s)");
@@ -1789,6 +1784,20 @@ function isSlowPlatform() {
   return SpecialPowers.Services.appinfo.name == "B2G" || getAndroidVersion() == 10;
 }
 
+async function dumpDebugInfoForToken(token) {
+  for (let v of document.getElementsByTagName("video")) {
+    if (token === v.token) {
+      return v.mozDumpDebugInfo();
+    }
+  }
+  for (let a of document.getElementsByTagName("audio")) {
+    if (token === a.token) {
+      return a.mozDumpDebugInfo();
+    }
+  }
+  return Promise.resolve();
+}
+
 function dumpDebugInfo() {
   for (var v of document.getElementsByTagName("video")) {
     v.mozDumpDebugInfo();