1use crate::{
2 Action, AnyElement, AnyView, AnyWindowHandle, AppCell, AppContext, AsyncAppContext,
3 AvailableSpace, BackgroundExecutor, Bounds, ClipboardItem, Context, Entity, EventEmitter,
4 ForegroundExecutor, Global, InputEvent, Keystroke, Model, ModelContext, Pixels, Platform,
5 Point, Render, Result, Size, Task, TestDispatcher, TestPlatform, TestWindow, TextSystem, View,
6 ViewContext, VisualContext, WindowContext, WindowHandle, WindowOptions,
7};
8use anyhow::{anyhow, bail};
9use futures::{Stream, StreamExt};
10use std::{cell::RefCell, future::Future, ops::Deref, rc::Rc, sync::Arc, time::Duration};
11
12/// A TestAppContext is provided to tests created with `#[gpui::test]`, it provides
13/// an implementation of `Context` with additional methods that are useful in tests.
14#[derive(Clone)]
15pub struct TestAppContext {
16 #[doc(hidden)]
17 pub app: Rc<AppCell>,
18 #[doc(hidden)]
19 pub background_executor: BackgroundExecutor,
20 #[doc(hidden)]
21 pub foreground_executor: ForegroundExecutor,
22 #[doc(hidden)]
23 pub dispatcher: TestDispatcher,
24 test_platform: Rc<TestPlatform>,
25 text_system: Arc<TextSystem>,
26 fn_name: Option<&'static str>,
27 on_quit: Rc<RefCell<Vec<Box<dyn FnOnce() + 'static>>>>,
28}
29
30impl Context for TestAppContext {
31 type Result<T> = T;
32
33 fn new_model<T: 'static>(
34 &mut self,
35 build_model: impl FnOnce(&mut ModelContext<'_, T>) -> T,
36 ) -> Self::Result<Model<T>>
37 where
38 T: 'static,
39 {
40 let mut app = self.app.borrow_mut();
41 app.new_model(build_model)
42 }
43
44 fn update_model<T: 'static, R>(
45 &mut self,
46 handle: &Model<T>,
47 update: impl FnOnce(&mut T, &mut ModelContext<'_, T>) -> R,
48 ) -> Self::Result<R> {
49 let mut app = self.app.borrow_mut();
50 app.update_model(handle, update)
51 }
52
53 fn update_window<T, F>(&mut self, window: AnyWindowHandle, f: F) -> Result<T>
54 where
55 F: FnOnce(AnyView, &mut WindowContext<'_>) -> T,
56 {
57 let mut lock = self.app.borrow_mut();
58 lock.update_window(window, f)
59 }
60
61 fn read_model<T, R>(
62 &self,
63 handle: &Model<T>,
64 read: impl FnOnce(&T, &AppContext) -> R,
65 ) -> Self::Result<R>
66 where
67 T: 'static,
68 {
69 let app = self.app.borrow();
70 app.read_model(handle, read)
71 }
72
73 fn read_window<T, R>(
74 &self,
75 window: &WindowHandle<T>,
76 read: impl FnOnce(View<T>, &AppContext) -> R,
77 ) -> Result<R>
78 where
79 T: 'static,
80 {
81 let app = self.app.borrow();
82 app.read_window(window, read)
83 }
84}
85
86impl TestAppContext {
87 /// Creates a new `TestAppContext`. Usually you can rely on `#[gpui::test]` to do this for you.
88 pub fn new(dispatcher: TestDispatcher, fn_name: Option<&'static str>) -> Self {
89 let arc_dispatcher = Arc::new(dispatcher.clone());
90 let background_executor = BackgroundExecutor::new(arc_dispatcher.clone());
91 let foreground_executor = ForegroundExecutor::new(arc_dispatcher);
92 let platform = TestPlatform::new(background_executor.clone(), foreground_executor.clone());
93 let asset_source = Arc::new(());
94 let http_client = util::http::FakeHttpClient::with_404_response();
95 let text_system = Arc::new(TextSystem::new(platform.text_system()));
96
97 Self {
98 app: AppContext::new(platform.clone(), asset_source, http_client),
99 background_executor,
100 foreground_executor,
101 dispatcher: dispatcher.clone(),
102 test_platform: platform,
103 text_system,
104 fn_name,
105 on_quit: Rc::new(RefCell::new(Vec::default())),
106 }
107 }
108
109 /// The name of the test function that created this `TestAppContext`
110 pub fn test_function_name(&self) -> Option<&'static str> {
111 self.fn_name
112 }
113
114 /// Checks whether there have been any new path prompts received by the platform.
115 pub fn did_prompt_for_new_path(&self) -> bool {
116 self.test_platform.did_prompt_for_new_path()
117 }
118
119 /// returns a new `TestAppContext` re-using the same executors to interleave tasks.
120 pub fn new_app(&self) -> TestAppContext {
121 Self::new(self.dispatcher.clone(), self.fn_name)
122 }
123
124 /// Called by the test helper to end the test.
125 /// public so the macro can call it.
126 pub fn quit(&self) {
127 self.on_quit.borrow_mut().drain(..).for_each(|f| f());
128 self.app.borrow_mut().shutdown();
129 }
130
131 /// Register cleanup to run when the test ends.
132 pub fn on_quit(&mut self, f: impl FnOnce() + 'static) {
133 self.on_quit.borrow_mut().push(Box::new(f));
134 }
135
136 /// Schedules all windows to be redrawn on the next effect cycle.
137 pub fn refresh(&mut self) -> Result<()> {
138 let mut app = self.app.borrow_mut();
139 app.refresh();
140 Ok(())
141 }
142
143 /// Returns an executor (for running tasks in the background)
144 pub fn executor(&self) -> BackgroundExecutor {
145 self.background_executor.clone()
146 }
147
148 /// Returns an executor (for running tasks on the main thread)
149 pub fn foreground_executor(&self) -> &ForegroundExecutor {
150 &self.foreground_executor
151 }
152
153 /// Gives you an `&mut AppContext` for the duration of the closure
154 pub fn update<R>(&self, f: impl FnOnce(&mut AppContext) -> R) -> R {
155 let mut cx = self.app.borrow_mut();
156 cx.update(f)
157 }
158
159 /// Gives you an `&AppContext` for the duration of the closure
160 pub fn read<R>(&self, f: impl FnOnce(&AppContext) -> R) -> R {
161 let cx = self.app.borrow();
162 f(&*cx)
163 }
164
165 /// Adds a new window. The Window will always be backed by a `TestWindow` which
166 /// can be retrieved with `self.test_window(handle)`
167 pub fn add_window<F, V>(&mut self, build_window: F) -> WindowHandle<V>
168 where
169 F: FnOnce(&mut ViewContext<V>) -> V,
170 V: 'static + Render,
171 {
172 let mut cx = self.app.borrow_mut();
173 cx.open_window(WindowOptions::default(), |cx| cx.new_view(build_window))
174 }
175
176 /// Adds a new window with no content.
177 pub fn add_empty_window(&mut self) -> &mut VisualTestContext {
178 let mut cx = self.app.borrow_mut();
179 let window = cx.open_window(WindowOptions::default(), |cx| cx.new_view(|_| ()));
180 drop(cx);
181 let cx = VisualTestContext::from_window(*window.deref(), self).as_mut();
182 cx.run_until_parked();
183 cx
184 }
185
186 /// Adds a new window, and returns its root view and a `VisualTestContext` which can be used
187 /// as a `WindowContext` for the rest of the test. Typically you would shadow this context with
188 /// the returned one. `let (view, cx) = cx.add_window_view(...);`
189 pub fn add_window_view<F, V>(&mut self, build_window: F) -> (View<V>, &mut VisualTestContext)
190 where
191 F: FnOnce(&mut ViewContext<V>) -> V,
192 V: 'static + Render,
193 {
194 let mut cx = self.app.borrow_mut();
195 let window = cx.open_window(WindowOptions::default(), |cx| cx.new_view(build_window));
196 drop(cx);
197 let view = window.root_view(self).unwrap();
198 let cx = VisualTestContext::from_window(*window.deref(), self).as_mut();
199 cx.run_until_parked();
200
201 // it might be nice to try and cleanup these at the end of each test.
202 (view, cx)
203 }
204
205 /// returns the TextSystem
206 pub fn text_system(&self) -> &Arc<TextSystem> {
207 &self.text_system
208 }
209
210 /// Simulates writing to the platform clipboard
211 pub fn write_to_clipboard(&self, item: ClipboardItem) {
212 self.test_platform.write_to_clipboard(item)
213 }
214
215 /// Simulates reading from the platform clipboard.
216 /// This will return the most recent value from `write_to_clipboard`.
217 pub fn read_from_clipboard(&self) -> Option<ClipboardItem> {
218 self.test_platform.read_from_clipboard()
219 }
220
221 /// Simulates choosing a File in the platform's "Open" dialog.
222 pub fn simulate_new_path_selection(
223 &self,
224 select_path: impl FnOnce(&std::path::Path) -> Option<std::path::PathBuf>,
225 ) {
226 self.test_platform.simulate_new_path_selection(select_path);
227 }
228
229 /// Simulates clicking a button in an platform-level alert dialog.
230 pub fn simulate_prompt_answer(&self, button_ix: usize) {
231 self.test_platform.simulate_prompt_answer(button_ix);
232 }
233
234 /// Returns true if there's an alert dialog open.
235 pub fn has_pending_prompt(&self) -> bool {
236 self.test_platform.has_pending_prompt()
237 }
238
239 /// Simulates the user resizing the window to the new size.
240 pub fn simulate_window_resize(&self, window_handle: AnyWindowHandle, size: Size<Pixels>) {
241 self.test_window(window_handle).simulate_resize(size);
242 }
243
244 /// Returns all windows open in the test.
245 pub fn windows(&self) -> Vec<AnyWindowHandle> {
246 self.app.borrow().windows().clone()
247 }
248
249 /// Run the given task on the main thread.
250 pub fn spawn<Fut, R>(&self, f: impl FnOnce(AsyncAppContext) -> Fut) -> Task<R>
251 where
252 Fut: Future<Output = R> + 'static,
253 R: 'static,
254 {
255 self.foreground_executor.spawn(f(self.to_async()))
256 }
257
258 /// true if the given global is defined
259 pub fn has_global<G: Global>(&self) -> bool {
260 let app = self.app.borrow();
261 app.has_global::<G>()
262 }
263
264 /// runs the given closure with a reference to the global
265 /// panics if `has_global` would return false.
266 pub fn read_global<G: Global, R>(&self, read: impl FnOnce(&G, &AppContext) -> R) -> R {
267 let app = self.app.borrow();
268 read(app.global(), &app)
269 }
270
271 /// runs the given closure with a reference to the global (if set)
272 pub fn try_read_global<G: Global, R>(
273 &self,
274 read: impl FnOnce(&G, &AppContext) -> R,
275 ) -> Option<R> {
276 let lock = self.app.borrow();
277 Some(read(lock.try_global()?, &lock))
278 }
279
280 /// sets the global in this context.
281 pub fn set_global<G: Global>(&mut self, global: G) {
282 let mut lock = self.app.borrow_mut();
283 lock.set_global(global);
284 }
285
286 /// updates the global in this context. (panics if `has_global` would return false)
287 pub fn update_global<G: Global, R>(
288 &mut self,
289 update: impl FnOnce(&mut G, &mut AppContext) -> R,
290 ) -> R {
291 let mut lock = self.app.borrow_mut();
292 lock.update_global(update)
293 }
294
295 /// Returns an `AsyncAppContext` which can be used to run tasks that expect to be on a background
296 /// thread on the current thread in tests.
297 pub fn to_async(&self) -> AsyncAppContext {
298 AsyncAppContext {
299 app: Rc::downgrade(&self.app),
300 background_executor: self.background_executor.clone(),
301 foreground_executor: self.foreground_executor.clone(),
302 }
303 }
304
305 /// Wait until there are no more pending tasks.
306 pub fn run_until_parked(&mut self) {
307 self.background_executor.run_until_parked()
308 }
309
310 /// Simulate dispatching an action to the currently focused node in the window.
311 pub fn dispatch_action<A>(&mut self, window: AnyWindowHandle, action: A)
312 where
313 A: Action,
314 {
315 window
316 .update(self, |_, cx| cx.dispatch_action(action.boxed_clone()))
317 .unwrap();
318
319 self.background_executor.run_until_parked()
320 }
321
322 /// simulate_keystrokes takes a space-separated list of keys to type.
323 /// cx.simulate_keystrokes("cmd-shift-p b k s p enter")
324 /// in Zed, this will run backspace on the current editor through the command palette.
325 /// This will also run the background executor until it's parked.
326 pub fn simulate_keystrokes(&mut self, window: AnyWindowHandle, keystrokes: &str) {
327 for keystroke in keystrokes
328 .split(" ")
329 .map(Keystroke::parse)
330 .map(Result::unwrap)
331 {
332 self.dispatch_keystroke(window, keystroke.into(), false);
333 }
334
335 self.background_executor.run_until_parked()
336 }
337
338 /// simulate_input takes a string of text to type.
339 /// cx.simulate_input("abc")
340 /// will type abc into your current editor
341 /// This will also run the background executor until it's parked.
342 pub fn simulate_input(&mut self, window: AnyWindowHandle, input: &str) {
343 for keystroke in input.split("").map(Keystroke::parse).map(Result::unwrap) {
344 self.dispatch_keystroke(window, keystroke.into(), false);
345 }
346
347 self.background_executor.run_until_parked()
348 }
349
350 /// dispatches a single Keystroke (see also `simulate_keystrokes` and `simulate_input`)
351 pub fn dispatch_keystroke(
352 &mut self,
353 window: AnyWindowHandle,
354 keystroke: Keystroke,
355 is_held: bool,
356 ) {
357 self.test_window(window)
358 .simulate_keystroke(keystroke, is_held)
359 }
360
361 /// Returns the `TestWindow` backing the given handle.
362 pub(crate) fn test_window(&self, window: AnyWindowHandle) -> TestWindow {
363 self.app
364 .borrow_mut()
365 .windows
366 .get_mut(window.id)
367 .unwrap()
368 .as_mut()
369 .unwrap()
370 .platform_window
371 .as_test()
372 .unwrap()
373 .clone()
374 }
375
376 /// Returns a stream of notifications whenever the View or Model is updated.
377 pub fn notifications<T: 'static>(&mut self, entity: &impl Entity<T>) -> impl Stream<Item = ()> {
378 let (tx, rx) = futures::channel::mpsc::unbounded();
379 self.update(|cx| {
380 cx.observe(entity, {
381 let tx = tx.clone();
382 move |_, _| {
383 let _ = tx.unbounded_send(());
384 }
385 })
386 .detach();
387 cx.observe_release(entity, move |_, _| tx.close_channel())
388 .detach()
389 });
390 rx
391 }
392
393 /// Retuens a stream of events emitted by the given Model.
394 pub fn events<Evt, T: 'static + EventEmitter<Evt>>(
395 &mut self,
396 entity: &Model<T>,
397 ) -> futures::channel::mpsc::UnboundedReceiver<Evt>
398 where
399 Evt: 'static + Clone,
400 {
401 let (tx, rx) = futures::channel::mpsc::unbounded();
402 entity
403 .update(self, |_, cx: &mut ModelContext<T>| {
404 cx.subscribe(entity, move |_model, _handle, event, _cx| {
405 let _ = tx.unbounded_send(event.clone());
406 })
407 })
408 .detach();
409 rx
410 }
411
412 /// Runs until the given condition becomes true. (Prefer `run_until_parked` if you
413 /// don't need to jump in at a specific time).
414 pub async fn condition<T: 'static>(
415 &mut self,
416 model: &Model<T>,
417 mut predicate: impl FnMut(&mut T, &mut ModelContext<T>) -> bool,
418 ) {
419 let timer = self.executor().timer(Duration::from_secs(3));
420 let mut notifications = self.notifications(model);
421
422 use futures::FutureExt as _;
423 use smol::future::FutureExt as _;
424
425 async {
426 loop {
427 if model.update(self, &mut predicate) {
428 return Ok(());
429 }
430
431 if notifications.next().await.is_none() {
432 bail!("model dropped")
433 }
434 }
435 }
436 .race(timer.map(|_| Err(anyhow!("condition timed out"))))
437 .await
438 .unwrap();
439 }
440}
441
442impl<T: Send> Model<T> {
443 /// Block until the next event is emitted by the model, then return it.
444 pub fn next_event<Evt>(&self, cx: &mut TestAppContext) -> Evt
445 where
446 Evt: Send + Clone + 'static,
447 T: EventEmitter<Evt>,
448 {
449 let (tx, mut rx) = futures::channel::mpsc::unbounded();
450 let _subscription = self.update(cx, |_, cx| {
451 cx.subscribe(self, move |_, _, event, _| {
452 tx.unbounded_send(event.clone()).ok();
453 })
454 });
455
456 // Run other tasks until the event is emitted.
457 loop {
458 match rx.try_next() {
459 Ok(Some(event)) => return event,
460 Ok(None) => panic!("model was dropped"),
461 Err(_) => {
462 if !cx.executor().tick() {
463 break;
464 }
465 }
466 }
467 }
468 panic!("no event received")
469 }
470}
471
472impl<V: 'static> View<V> {
473 /// Returns a future that resolves when the view is next updated.
474 pub fn next_notification(&self, cx: &TestAppContext) -> impl Future<Output = ()> {
475 use postage::prelude::{Sink as _, Stream as _};
476
477 let (mut tx, mut rx) = postage::mpsc::channel(1);
478 let mut cx = cx.app.app.borrow_mut();
479 let subscription = cx.observe(self, move |_, _| {
480 tx.try_send(()).ok();
481 });
482
483 let duration = if std::env::var("CI").is_ok() {
484 Duration::from_secs(5)
485 } else {
486 Duration::from_secs(1)
487 };
488
489 async move {
490 let notification = crate::util::timeout(duration, rx.recv())
491 .await
492 .expect("next notification timed out");
493 drop(subscription);
494 notification.expect("model dropped while test was waiting for its next notification")
495 }
496 }
497}
498
499impl<V> View<V> {
500 /// Returns a future that resolves when the condition becomes true.
501 pub fn condition<Evt>(
502 &self,
503 cx: &TestAppContext,
504 mut predicate: impl FnMut(&V, &AppContext) -> bool,
505 ) -> impl Future<Output = ()>
506 where
507 Evt: 'static,
508 V: EventEmitter<Evt>,
509 {
510 use postage::prelude::{Sink as _, Stream as _};
511
512 let (tx, mut rx) = postage::mpsc::channel(1024);
513 let timeout_duration = Duration::from_millis(100);
514
515 let mut cx = cx.app.borrow_mut();
516 let subscriptions = (
517 cx.observe(self, {
518 let mut tx = tx.clone();
519 move |_, _| {
520 tx.blocking_send(()).ok();
521 }
522 }),
523 cx.subscribe(self, {
524 let mut tx = tx.clone();
525 move |_, _: &Evt, _| {
526 tx.blocking_send(()).ok();
527 }
528 }),
529 );
530
531 let cx = cx.this.upgrade().unwrap();
532 let handle = self.downgrade();
533
534 async move {
535 crate::util::timeout(timeout_duration, async move {
536 loop {
537 {
538 let cx = cx.borrow();
539 let cx = &*cx;
540 if predicate(
541 handle
542 .upgrade()
543 .expect("view dropped with pending condition")
544 .read(cx),
545 cx,
546 ) {
547 break;
548 }
549 }
550
551 cx.borrow().background_executor().start_waiting();
552 rx.recv()
553 .await
554 .expect("view dropped with pending condition");
555 cx.borrow().background_executor().finish_waiting();
556 }
557 })
558 .await
559 .expect("condition timed out");
560 drop(subscriptions);
561 }
562 }
563}
564
565use derive_more::{Deref, DerefMut};
566#[derive(Deref, DerefMut, Clone)]
567/// A VisualTestContext is the test-equivalent of a `WindowContext`. It allows you to
568/// run window-specific test code.
569pub struct VisualTestContext {
570 #[deref]
571 #[deref_mut]
572 /// cx is the original TestAppContext (you can more easily access this using Deref)
573 pub cx: TestAppContext,
574 window: AnyWindowHandle,
575}
576
577impl<'a> VisualTestContext {
578 /// Get the underlying window handle underlying this context.
579 pub fn handle(&self) -> AnyWindowHandle {
580 self.window
581 }
582
583 /// Provides the `WindowContext` for the duration of the closure.
584 pub fn update<R>(&mut self, f: impl FnOnce(&mut WindowContext) -> R) -> R {
585 self.cx.update_window(self.window, |_, cx| f(cx)).unwrap()
586 }
587
588 /// Creates a new VisualTestContext. You would typically shadow the passed in
589 /// TestAppContext with this, as this is typically more useful.
590 /// `let cx = VisualTestContext::from_window(window, cx);`
591 pub fn from_window(window: AnyWindowHandle, cx: &TestAppContext) -> Self {
592 Self {
593 cx: cx.clone(),
594 window,
595 }
596 }
597
598 /// Wait until there are no more pending tasks.
599 pub fn run_until_parked(&self) {
600 self.cx.background_executor.run_until_parked();
601 }
602
603 /// Dispatch the action to the currently focused node.
604 pub fn dispatch_action<A>(&mut self, action: A)
605 where
606 A: Action,
607 {
608 self.cx.dispatch_action(self.window, action)
609 }
610
611 /// Read the title off the window (set by `WindowContext#set_window_title`)
612 pub fn window_title(&mut self) -> Option<String> {
613 self.cx.test_window(self.window).0.lock().title.clone()
614 }
615
616 /// Simulate a sequence of keystrokes `cx.simulate_keystrokes("cmd-p escape")`
617 /// Automatically runs until parked.
618 pub fn simulate_keystrokes(&mut self, keystrokes: &str) {
619 self.cx.simulate_keystrokes(self.window, keystrokes)
620 }
621
622 /// Simulate typing text `cx.simulate_input("hello")`
623 /// Automatically runs until parked.
624 pub fn simulate_input(&mut self, input: &str) {
625 self.cx.simulate_input(self.window, input)
626 }
627
628 /// Simulates the user resizing the window to the new size.
629 pub fn simulate_resize(&self, size: Size<Pixels>) {
630 self.simulate_window_resize(self.window, size)
631 }
632
633 /// debug_bounds returns the bounds of the element with the given selector.
634 pub fn debug_bounds(&mut self, selector: &'static str) -> Option<Bounds<Pixels>> {
635 self.update(|cx| cx.window.rendered_frame.debug_bounds.get(selector).copied())
636 }
637
638 /// Draw an element to the window. Useful for simulating events or actions
639 pub fn draw(
640 &mut self,
641 origin: Point<Pixels>,
642 space: Size<AvailableSpace>,
643 f: impl FnOnce(&mut WindowContext) -> AnyElement,
644 ) {
645 self.update(|cx| {
646 let entity_id = cx
647 .window
648 .root_view
649 .as_ref()
650 .expect("Can't draw to this window without a root view")
651 .entity_id();
652
653 cx.with_element_context(|cx| {
654 cx.with_view_id(entity_id, |cx| {
655 f(cx).draw(origin, space, cx);
656 })
657 });
658
659 cx.refresh();
660 })
661 }
662
663 /// Simulate an event from the platform, e.g. a SrollWheelEvent
664 /// Make sure you've called [VisualTestContext::draw] first!
665 pub fn simulate_event<E: InputEvent>(&mut self, event: E) {
666 self.test_window(self.window)
667 .simulate_input(event.to_platform_input());
668 self.background_executor.run_until_parked();
669 }
670
671 /// Simulates the user blurring the window.
672 pub fn deactivate_window(&mut self) {
673 if Some(self.window) == self.test_platform.active_window() {
674 self.test_platform.set_active_window(None)
675 }
676 self.background_executor.run_until_parked();
677 }
678
679 /// Simulates the user closing the window.
680 /// Returns true if the window was closed.
681 pub fn simulate_close(&mut self) -> bool {
682 let handler = self
683 .cx
684 .update_window(self.window, |_, cx| {
685 cx.window
686 .platform_window
687 .as_test()
688 .unwrap()
689 .0
690 .lock()
691 .should_close_handler
692 .take()
693 })
694 .unwrap();
695 if let Some(mut handler) = handler {
696 let should_close = handler();
697 self.cx
698 .update_window(self.window, |_, cx| {
699 cx.window.platform_window.on_should_close(handler);
700 })
701 .unwrap();
702 should_close
703 } else {
704 false
705 }
706 }
707
708 /// Get an &mut VisualTestContext (which is mostly what you need to pass to other methods).
709 /// This method internally retains the VisualTestContext until the end of the test.
710 pub fn as_mut(self) -> &'static mut Self {
711 let ptr = Box::into_raw(Box::new(self));
712 // safety: on_quit will be called after the test has finished.
713 // the executor will ensure that all tasks related to the test have stopped.
714 // so there is no way for cx to be accessed after on_quit is called.
715 let cx = Box::leak(unsafe { Box::from_raw(ptr) });
716 cx.on_quit(move || unsafe {
717 drop(Box::from_raw(ptr));
718 });
719 cx
720 }
721}
722
723impl Context for VisualTestContext {
724 type Result<T> = <TestAppContext as Context>::Result<T>;
725
726 fn new_model<T: 'static>(
727 &mut self,
728 build_model: impl FnOnce(&mut ModelContext<'_, T>) -> T,
729 ) -> Self::Result<Model<T>> {
730 self.cx.new_model(build_model)
731 }
732
733 fn update_model<T, R>(
734 &mut self,
735 handle: &Model<T>,
736 update: impl FnOnce(&mut T, &mut ModelContext<'_, T>) -> R,
737 ) -> Self::Result<R>
738 where
739 T: 'static,
740 {
741 self.cx.update_model(handle, update)
742 }
743
744 fn read_model<T, R>(
745 &self,
746 handle: &Model<T>,
747 read: impl FnOnce(&T, &AppContext) -> R,
748 ) -> Self::Result<R>
749 where
750 T: 'static,
751 {
752 self.cx.read_model(handle, read)
753 }
754
755 fn update_window<T, F>(&mut self, window: AnyWindowHandle, f: F) -> Result<T>
756 where
757 F: FnOnce(AnyView, &mut WindowContext<'_>) -> T,
758 {
759 self.cx.update_window(window, f)
760 }
761
762 fn read_window<T, R>(
763 &self,
764 window: &WindowHandle<T>,
765 read: impl FnOnce(View<T>, &AppContext) -> R,
766 ) -> Result<R>
767 where
768 T: 'static,
769 {
770 self.cx.read_window(window, read)
771 }
772}
773
774impl VisualContext for VisualTestContext {
775 fn new_view<V>(
776 &mut self,
777 build_view: impl FnOnce(&mut ViewContext<'_, V>) -> V,
778 ) -> Self::Result<View<V>>
779 where
780 V: 'static + Render,
781 {
782 self.window
783 .update(&mut self.cx, |_, cx| cx.new_view(build_view))
784 .unwrap()
785 }
786
787 fn update_view<V: 'static, R>(
788 &mut self,
789 view: &View<V>,
790 update: impl FnOnce(&mut V, &mut ViewContext<'_, V>) -> R,
791 ) -> Self::Result<R> {
792 self.window
793 .update(&mut self.cx, |_, cx| cx.update_view(view, update))
794 .unwrap()
795 }
796
797 fn replace_root_view<V>(
798 &mut self,
799 build_view: impl FnOnce(&mut ViewContext<'_, V>) -> V,
800 ) -> Self::Result<View<V>>
801 where
802 V: 'static + Render,
803 {
804 self.window
805 .update(&mut self.cx, |_, cx| cx.replace_root_view(build_view))
806 .unwrap()
807 }
808
809 fn focus_view<V: crate::FocusableView>(&mut self, view: &View<V>) -> Self::Result<()> {
810 self.window
811 .update(&mut self.cx, |_, cx| {
812 view.read(cx).focus_handle(cx).clone().focus(cx)
813 })
814 .unwrap()
815 }
816
817 fn dismiss_view<V>(&mut self, view: &View<V>) -> Self::Result<()>
818 where
819 V: crate::ManagedView,
820 {
821 self.window
822 .update(&mut self.cx, |_, cx| {
823 view.update(cx, |_, cx| cx.emit(crate::DismissEvent))
824 })
825 .unwrap()
826 }
827}
828
829impl AnyWindowHandle {
830 /// Creates the given view in this window.
831 pub fn build_view<V: Render + 'static>(
832 &self,
833 cx: &mut TestAppContext,
834 build_view: impl FnOnce(&mut ViewContext<'_, V>) -> V,
835 ) -> View<V> {
836 self.update(cx, |_, cx| cx.new_view(build_view)).unwrap()
837 }
838}