Auto merge of #12392 - emilio:test-animations, r=SimonSapin

style: Add support to test animations programatically.

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #12120

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- [x] There are tests for these changes OR

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r? @SimonSapin for the style changes, @Ms2ger or @jdm for the dom and test changes

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1 files changed, 5 insertions, 4 deletions

diff --git a/components/layout/animation.rs b/components/layout/animation.rs
index 4087479ed47..5a67b1af5bf 100644
--- a/components/layout/animation.rs
+++ b/components/layout/animation.rs
@@ -14,7 +14,7 @@ use script_traits::{AnimationState, LayoutMsg as ConstellationMsg};
 use std::collections::HashMap;
 use std::sync::mpsc::Receiver;
 use style::animation::{Animation, update_style_for_animation};
-use time;
+use style::timer::Timer;
 
 /// Processes any new animations that were discovered after style recalculation.
 /// Also expire any old animations that have completed, inserting them into
@@ -23,7 +23,8 @@ pub fn update_animation_state(constellation_chan: &IpcSender<ConstellationMsg>,
                               running_animations: &mut HashMap<OpaqueNode, Vec<Animation>>,
                               expired_animations: &mut HashMap<OpaqueNode, Vec<Animation>>,
                               new_animations_receiver: &Receiver<Animation>,
-                              pipeline_id: PipelineId) {
+                              pipeline_id: PipelineId,
+                              timer: &Timer) {
     let mut new_running_animations = vec![];
     while let Ok(animation) = new_animations_receiver.try_recv() {
         let mut should_push = true;
@@ -37,7 +38,7 @@ pub fn update_animation_state(constellation_chan: &IpcSender<ConstellationMsg>,
                     if let Animation::Keyframes(_, ref anim_name, ref mut anim_state) = *anim {
                         if *name == *anim_name {
                             debug!("update_animation_state: Found other animation {}", name);
-                            anim_state.update_from_other(&state);
+                            anim_state.update_from_other(&state, timer);
                             should_push = false;
                             break;
                         }
@@ -57,7 +58,7 @@ pub fn update_animation_state(constellation_chan: &IpcSender<ConstellationMsg>,
         return
     }
 
-    let now = time::precise_time_s();
+    let now = timer.seconds();
     // Expire old running animations.
     //
     // TODO: Do not expunge Keyframes animations, since we need that state if