Bug 1656893 - Make test_running_on_compositor.html work with disabling partial pre-render. r=boris

Differential Revision: https://phabricator.services.mozilla.com/D85797

dom/animation/test/chrome/test_running_on_compositor.html

@@ -1429,16 +1429,30 @@ promise_test(async t => {
   await waitForAnimationReadyToRestyle(animation3);
   await waitForPaints();
 
-  assert_animation_is_running_on_compositor(animation1,
-    'rotate animation in the 3d rendering context should be running on ' +
-    'the compositor even if one of its inner frames is too large');
-  assert_animation_is_running_on_compositor(animation2,
-    'rotate animation in the 3d rendering context is still running on ' +
-    'the compositor because its display item is created earlier');
-  assert_animation_is_running_on_compositor(animation3,
-    'rotate animation in the 3d rendering context should be running on ' +
-    'the compositor even if one of its parent frames is too large');
+  const isPartialPrerenderEnabled =
+    SpecialPowers.getBoolPref('layout.animation.prerender.partial');
 
+  if (isPartialPrerenderEnabled) {
+    assert_animation_is_running_on_compositor(animation1,
+      'rotate animation in the 3d rendering context should be running on ' +
+      'the compositor even if one of its inner frames is too large');
+    assert_animation_is_running_on_compositor(animation2,
+      'rotate animation in the 3d rendering context is still running on ' +
+      'the compositor because its display item is created earlier');
+    assert_animation_is_running_on_compositor(animation3,
+      'rotate animation in the 3d rendering context should be running on ' +
+      'the compositor even if one of its parent frames is too large');
+  } else {
+    assert_animation_is_not_running_on_compositor(animation1,
+      'rotate animation in the 3d rendering context should not be running on ' +
+      'the compositor because one of its inner frames is too large');
+    assert_animation_is_running_on_compositor(animation2,
+      'rotate animation in the 3d rendering context is still running on ' +
+      'the compositor because its display item is created earlier');
+    assert_animation_is_not_running_on_compositor(animation3,
+      'rotate animation in the 3d rendering context should not be running on ' +
+      'the compositor because one of its parent frames is too large');
+  }
   innerBText.remove();
 }, 'Transform-like animations in the 3d rendering context should run on ' +
    'the compositor even if it is the ancestor of ones whose frames are too ' +
@@ -1472,16 +1486,30 @@ promise_test(async t => {
   await waitForAnimationReadyToRestyle(animation3);
   await waitForPaints();
 
-  assert_animation_is_running_on_compositor(animation1,
-    'rotate animation in the 3d rendering context should be running on ' +
-    'the compositor even if one of its inner frames is too large');
-  assert_animation_is_running_on_compositor(animation2,
-    'rotate animation in the 3d rendering context should not be running on ' +
-    'the compositor even if its frame size is too large');
-  assert_animation_is_running_on_compositor(animation3,
-    'rotate animation in the 3d rendering context should not be running on ' +
-    'the compositor even if its previous sibling frame is too large');
+  const isPartialPrerenderEnabled =
+    SpecialPowers.getBoolPref('layout.animation.prerender.partial');
 
+  if (isPartialPrerenderEnabled) {
+    assert_animation_is_running_on_compositor(animation1,
+      'rotate animation in the 3d rendering context should be running on ' +
+      'the compositor even if one of its inner frames is too large');
+    assert_animation_is_running_on_compositor(animation2,
+      'rotate animation in the 3d rendering context should be running on ' +
+      'the compositor even if its frame size is too large');
+    assert_animation_is_running_on_compositor(animation3,
+      'rotate animation in the 3d rendering context should be running on ' +
+      'the compositor even if its previous sibling frame is too large');
+  } else {
+    assert_animation_is_not_running_on_compositor(animation1,
+      'rotate animation in the 3d rendering context should not be running on ' +
+      'the compositor because one of its inner frames is too large');
+    assert_animation_is_not_running_on_compositor(animation2,
+      'rotate animation in the 3d rendering context should not be running on ' +
+      'the compositor because its frame size is too large');
+    assert_animation_is_not_running_on_compositor(animation3,
+      'rotate animation in the 3d rendering context should not be running on ' +
+      'the compositor because its previous sibling frame is too large');
+  }
   innerAText.remove();
 }, 'Transform-like animations in the 3d rendering context should run on ' +
    'the compositor even if its previous sibling frame size is too large');