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