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Auto merge of #6161 - jgraham:webdriver_stability, r=glennw

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This fixes various race conditions that affect test execution when using the servodriver product. It doesn't yet do enough to make servodriver a viable alternative to the normal servo test executor.

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This commit is contained in:
bors-servo 2015-06-02 21:11:44 -05:00
commit 0b7886b15f
4 changed files with 42 additions and 12 deletions
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46
components/compositing/constellation.rs
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@ -190,7 +190,7 @@ pub struct SendableFrameTree {
}
struct WebDriverData {
load_channel: Option<Sender<webdriver_msg::LoadComplete>>
load_channel: Option<(PipelineId, Sender<webdriver_msg::LoadComplete>)>
}
impl WebDriverData {
@ -634,6 +634,10 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
}
fn handle_load_url_msg(&mut self, source_id: PipelineId, load_data: LoadData) {
self.load_url(source_id, load_data);
}
fn load_url(&mut self, source_id: PipelineId, load_data: LoadData) -> Option<PipelineId> {
// If this load targets an iframe, its framing element may exist
// in a separate script task than the framed document that initiated
// the new load. The framing element must be notified about the
@ -648,13 +652,14 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
script_channel.send(ConstellationControlMsg::Navigate(parent_pipeline_id,
subpage_id,
load_data)).unwrap();
Some(source_id)
}
None => {
// Make sure no pending page would be overridden.
for frame_change in &self.pending_frames {
if frame_change.old_pipeline_id == Some(source_id) {
// id that sent load msg is being changed already; abort
return;
return None;
}
}
@ -670,6 +675,7 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
// Send message to ScriptTask that will suspend all timers
let old_pipeline = self.pipelines.get(&source_id).unwrap();
old_pipeline.freeze();
Some(new_pipeline_id)
}
}
}
@ -699,10 +705,17 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
let forward = !self.mut_frame(frame_id).next.is_empty();
let back = !self.mut_frame(frame_id).prev.is_empty();
self.compositor_proxy.send(CompositorMsg::LoadComplete(back, forward));
if let Some(ref reply_chan) = self.webdriver.load_channel {
reply_chan.send(webdriver_msg::LoadComplete).unwrap();
let mut webdriver_reset = false;
if let Some((ref expected_pipeline_id, ref reply_chan)) = self.webdriver.load_channel {
if expected_pipeline_id == pipeline_id {
reply_chan.send(webdriver_msg::LoadComplete).unwrap();
webdriver_reset = true;
}
}
if webdriver_reset {
self.webdriver.load_channel = None;
}
self.webdriver.load_channel = None;
}
fn handle_navigate_msg(&mut self,
@ -826,10 +839,13 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
fn handle_get_pipeline(&mut self, frame_id: Option<FrameId>,
resp_chan: Sender<Option<PipelineId>>) {
let pipeline_id = frame_id.or(self.root_frame_id).map(|frame_id| {
let current_pipeline_id = frame_id.or(self.root_frame_id).map(|frame_id| {
let frame = self.frames.get(&frame_id).unwrap();
frame.current
});
let pipeline_id = self.pending_frames.iter().rev()
.find(|x| x.old_pipeline_id == current_pipeline_id)
.map(|x| x.new_pipeline_id).or(current_pipeline_id);
resp_chan.send(pipeline_id).unwrap();
}
@ -885,8 +901,10 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
// and pass the event to that script task.
match msg {
WebDriverCommandMsg::LoadUrl(pipeline_id, load_data, reply) => {
self.handle_load_url_msg(pipeline_id, load_data);
self.webdriver.load_channel = Some(reply);
let new_pipeline_id = self.load_url(pipeline_id, load_data);
if let Some(id) = new_pipeline_id {
self.webdriver.load_channel = Some((id, reply));
}
},
WebDriverCommandMsg::ScriptCommand(pipeline_id, cmd) => {
let pipeline = self.pipeline(pipeline_id);
@ -894,8 +912,16 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
let ScriptControlChan(ref script_channel) = pipeline.script_chan;
script_channel.send(control_msg).unwrap();
},
WebDriverCommandMsg::TakeScreenshot(reply) => {
self.compositor_proxy.send(CompositorMsg::CreatePng(reply));
WebDriverCommandMsg::TakeScreenshot(pipeline_id, reply) => {
let current_pipeline_id = self.root_frame_id.map(|frame_id| {
let frame = self.frames.get(&frame_id).unwrap();
frame.current
});
if Some(pipeline_id) == current_pipeline_id {
self.compositor_proxy.send(CompositorMsg::CreatePng(reply));
} else {
reply.send(None).unwrap();
}
},
}
}