Bug 1488193 [wpt PR 8623] - [eme] Ensure license is expired before using it, a=testonly

Automatic update from web-platform-tests[eme] Ensure license is expired before using it (#8623)

This test generates a license that expires 1s from the current time, calls
update() with it, and then waits for 5s before calling play(). However,
Chrome caches a few frames in advance of play() being called. Depending on
the time granularity, the CDM may see a valid license and decode part of
the media file.

This change delays calling update() for 2s to ensure that the license has
expired, and ensures that the browser can't cache frames to use when play()
is called.
--

wpt-commits: 84097c6b8f84bc0d00c208bf7893cd0e10d654d5
wpt-pr: 8623

testing/web-platform/meta/MANIFEST.json

@@ -591765,7 +591765,7 @@
    "support"
   ],
   "encrypted-media/scripts/playback-temporary-expired.js": [
-   "5144ef967f78fef82aee7821a091c876b48f441c",
+   "3d1bd9591db309deb64df8765f5a7fd6fb5c4791",
    "support"
   ],
   "encrypted-media/scripts/playback-temporary-multikey-sequential.js": [

testing/web-platform/tests/encrypted-media/scripts/playback-temporary-expired.js

@@ -44,23 +44,26 @@ function runTest(config,qualifier) {
 
             assert_in_array(event.messageType, ['license-request', 'individualization-request']);
 
+            // Generate a license that expires 1 second from now.
             var expiration = Date.now().valueOf() + 1000;
             config.messagehandler(event.messageType, event.message, { expiration: expiration }).then(function(response) {
-                return event.target.update(response);
+                // Wait 2 seconds before calling update() to ensure that the
-            }).then(test.step_func(function() {
+                // license has really expired. This is to avoid problems
-                // License server may only have second granularity, so check
+                // where the browser starts buffering frames as soon as a
-                // that session expiration time is close to the desired value.
+                // valid license is received.
-                assert_approx_equals(event.target.expiration, expiration, 2000, "expiration attribute should equal provided expiration time");
-
-                // Since the expiration time is in the future, wait 5 seconds
-                // so that the license has expired before calling play().
                 test.step_timeout(function() {
-                    assert_greater_than(Date.now().valueOf(), expiration, "Starting play before license expired");
+                    event.target.update(response).then(function() {
-                    _video.play();
+                        // License server may only have second granularity, so check
-                    // Wait 2 seconds to ensure that the video does not play.
+                        // that session expiration time is close to the desired value.
-                    test.step_timeout(function() { test.done(); }, 2000);
+                        assert_approx_equals(event.target.expiration, expiration, 3000,
-                }, 5000);
+                                             "expiration attribute should equal provided expiration time");
-            })).catch(onFailure);
+                        assert_greater_than(Date.now().valueOf(), expiration, "Starting play before license expired");
+                        _video.play();
+                        // Wait 2 seconds to ensure that the video does not play.
+                        test.step_timeout(function() { test.done(); }, 2000);
+                    }).catch(onFailure);
+                }, 2000);
+            }).catch(onFailure);
         }
 
         function onPlaying(event) {