Bug 95622 – css3/filters/composited-during-animation-layertree.html sometimes produces empty results

• Status: RESOLVED
• Resolution: FIXED
• Component: CSS

[Jessie Berlin]

This is apparently expected behavior (since empty results were checked in for mac when the test was originally added in http://trac.webkit.org/changeset/109953), but I don't understand why. On Mountain Lion, there is actually a layer tree printed:

http://build.webkit.org/results/Apple%20MountainLion%20Debug%20WK2%20(Tests)/r127318%20(503)/css3/filters/composited-during-animation-layertree-pretty-diff.html

--- /Volumes/Data/slave/mountainlion-debug-tests-wk2/build/layout-test-results/css3/filters/composited-during-animation-layertree-expected.txt
+++ /Volumes/Data/slave/mountainlion-debug-tests-wk2/build/layout-test-results/css3/filters/composited-during-animation-layertree-actual.txt
@@ -2,4 +2,34 @@
    
    
   
+(GraphicsLayer
+  (bounds 800.00 600.00)
+  (children 1
+    (GraphicsLayer
+      (bounds 800.00 600.00)
+      (children 4
+        (GraphicsLayer
+          (position 18.00 18.00)
+          (bounds 160.00 90.00)
+          (drawsContent 1)
+        )
+        (GraphicsLayer
+          (position 18.00 132.00)
+          (bounds 160.00 90.00)
+          (drawsContent 1)
+        )
+        (GraphicsLayer
+          (position 18.00 246.00)
+          (bounds 160.00 90.00)
+          (drawsContent 1)
+        )
+        (GraphicsLayer
+          (position 18.00 360.00)
+          (bounds 160.00 90.00)
+          (drawsContent 1)
+        )
+      )
+    )
+  )
+)
 

Why are we expecting empty results on Lion? Is some feature not on in Lion?

I am going to add the expected results for ML and move the empty results to mac-lion to get the bots greener.

[Radar WebKit Bug Importer]

<rdar://problem/12229951>

[Alexey Proskuryakov]

This test sometimes (rarely) produces empty results on all Mountain Lion bots (WK1 and WK2).

Also, I can reproduce getting empty results every time when it's run repeatedly:

$ run-webkit-tests css3/filters/composited-during-animation-layertree.html --repeat-each 100
…
[2/100] css3/filters/composited-during-animation-layertree.html failed unexpectedly (text diff)
[3/100] css3/filters/composited-during-animation-layertree.html failed unexpectedly (text diff)
[4/100] css3/filters/composited-during-animation-layertree.html failed unexpectedly (text diff)
[5/100] css3/filters/composited-during-animation-layertree.html failed unexpectedly (text diff)
[6/100] css3/filters/composited-during-animation-layertree.html failed unexpectedly (text diff)
…

Marked as flaky in <http://trac.webkit.org/r157625>.

[Diego Pino]

GLIB ports (WebKitGTK and WPE) produce similar results (https://bugs.webkit.org/show_bug.cgi?id=171600).

The general baseline is empty. Isn't that a mistake?
https://github.com/WebKit/WebKit/blob/main/LayoutTests/css3/filters/composited-during-animation-layertree-expected.txt

[Cameron McCormack (:heycam)]

Pull request: https://github.com/WebKit/WebKit/pull/37208

[EWS]

Committed 287140@main (2020ece42d14): <https://commits.webkit.org/287140@main>

Reviewed commits have been landed. Closing PR #37208 and removing active labels.

[EWS]

Test gardening commit 287955@main (5e594e06978b): <https://commits.webkit.org/287955@main>

Reviewed commits have been landed. Closing PR #38084 and removing active labels.