1use crate::{
2 Action, AnyView, AnyWindowHandle, App, AppCell, AppContext, AsyncApp, AvailableSpace,
3 BackgroundExecutor, BorrowAppContext, Bounds, Capslock, ClipboardItem, DrawPhase, Drawable,
4 Element, Empty, EventEmitter, ForegroundExecutor, Global, InputEvent, Keystroke, Modifiers,
5 ModifiersChangedEvent, MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent, Pixels,
6 Platform, Point, Render, Result, Size, Task, TestDispatcher, TestPlatform,
7 TestScreenCaptureSource, TestWindow, TextSystem, VisualContext, Window, WindowBounds,
8 WindowHandle, WindowOptions,
9};
10use anyhow::{anyhow, bail};
11use futures::{Stream, StreamExt, channel::oneshot};
12use rand::{SeedableRng, rngs::StdRng};
13use std::{
14 cell::RefCell, future::Future, ops::Deref, path::PathBuf, rc::Rc, sync::Arc, time::Duration,
15};
16
17/// A TestAppContext is provided to tests created with `#[gpui::test]`, it provides
18/// an implementation of `Context` with additional methods that are useful in tests.
19#[derive(Clone)]
20pub struct TestAppContext {
21 #[doc(hidden)]
22 pub app: Rc<AppCell>,
23 #[doc(hidden)]
24 pub background_executor: BackgroundExecutor,
25 #[doc(hidden)]
26 pub foreground_executor: ForegroundExecutor,
27 #[doc(hidden)]
28 pub dispatcher: TestDispatcher,
29 test_platform: Rc<TestPlatform>,
30 text_system: Arc<TextSystem>,
31 fn_name: Option<&'static str>,
32 on_quit: Rc<RefCell<Vec<Box<dyn FnOnce() + 'static>>>>,
33}
34
35impl AppContext for TestAppContext {
36 type Result<T> = T;
37
38 fn new<T: 'static>(
39 &mut self,
40 build_entity: impl FnOnce(&mut Context<T>) -> T,
41 ) -> Self::Result<Entity<T>> {
42 let mut app = self.app.borrow_mut();
43 app.new(build_entity)
44 }
45
46 fn reserve_entity<T: 'static>(&mut self) -> Self::Result<crate::Reservation<T>> {
47 let mut app = self.app.borrow_mut();
48 app.reserve_entity()
49 }
50
51 fn insert_entity<T: 'static>(
52 &mut self,
53 reservation: crate::Reservation<T>,
54 build_entity: impl FnOnce(&mut Context<T>) -> T,
55 ) -> Self::Result<Entity<T>> {
56 let mut app = self.app.borrow_mut();
57 app.insert_entity(reservation, build_entity)
58 }
59
60 fn update_entity<T: 'static, R>(
61 &mut self,
62 handle: &Entity<T>,
63 update: impl FnOnce(&mut T, &mut Context<T>) -> R,
64 ) -> Self::Result<R> {
65 let mut app = self.app.borrow_mut();
66 app.update_entity(handle, update)
67 }
68
69 fn as_mut<'a, T>(&'a mut self, _: &Entity<T>) -> Self::Result<super::GpuiBorrow<'a, T>>
70 where
71 T: 'static,
72 {
73 panic!("Cannot use as_mut with a test app context. Try calling update() first")
74 }
75
76 fn read_entity<T, R>(
77 &self,
78 handle: &Entity<T>,
79 read: impl FnOnce(&T, &App) -> R,
80 ) -> Self::Result<R>
81 where
82 T: 'static,
83 {
84 let app = self.app.borrow();
85 app.read_entity(handle, read)
86 }
87
88 fn update_window<T, F>(&mut self, window: AnyWindowHandle, f: F) -> Result<T>
89 where
90 F: FnOnce(AnyView, &mut Window, &mut App) -> T,
91 {
92 let mut lock = self.app.borrow_mut();
93 lock.update_window(window, f)
94 }
95
96 fn read_window<T, R>(
97 &self,
98 window: &WindowHandle<T>,
99 read: impl FnOnce(Entity<T>, &App) -> R,
100 ) -> Result<R>
101 where
102 T: 'static,
103 {
104 let app = self.app.borrow();
105 app.read_window(window, read)
106 }
107
108 fn background_spawn<R>(&self, future: impl Future<Output = R> + Send + 'static) -> Task<R>
109 where
110 R: Send + 'static,
111 {
112 self.background_executor.spawn(future)
113 }
114
115 fn read_global<G, R>(&self, callback: impl FnOnce(&G, &App) -> R) -> Self::Result<R>
116 where
117 G: Global,
118 {
119 let app = self.app.borrow();
120 app.read_global(callback)
121 }
122}
123
124impl TestAppContext {
125 /// Creates a new `TestAppContext`. Usually you can rely on `#[gpui::test]` to do this for you.
126 pub fn build(dispatcher: TestDispatcher, fn_name: Option<&'static str>) -> Self {
127 let arc_dispatcher = Arc::new(dispatcher.clone());
128 let background_executor = BackgroundExecutor::new(arc_dispatcher.clone());
129 let foreground_executor = ForegroundExecutor::new(arc_dispatcher);
130 let platform = TestPlatform::new(background_executor.clone(), foreground_executor.clone());
131 let asset_source = Arc::new(());
132 let http_client = http_client::FakeHttpClient::with_404_response();
133 let text_system = Arc::new(TextSystem::new(platform.text_system()));
134
135 Self {
136 app: App::new_app(platform.clone(), asset_source, http_client),
137 background_executor,
138 foreground_executor,
139 dispatcher,
140 test_platform: platform,
141 text_system,
142 fn_name,
143 on_quit: Rc::new(RefCell::new(Vec::default())),
144 }
145 }
146
147 /// Create a single TestAppContext, for non-multi-client tests
148 pub fn single() -> Self {
149 let dispatcher = TestDispatcher::new(StdRng::seed_from_u64(0));
150 Self::build(dispatcher, None)
151 }
152
153 /// The name of the test function that created this `TestAppContext`
154 pub fn test_function_name(&self) -> Option<&'static str> {
155 self.fn_name
156 }
157
158 /// Checks whether there have been any new path prompts received by the platform.
159 pub fn did_prompt_for_new_path(&self) -> bool {
160 self.test_platform.did_prompt_for_new_path()
161 }
162
163 /// returns a new `TestAppContext` re-using the same executors to interleave tasks.
164 pub fn new_app(&self) -> TestAppContext {
165 Self::build(self.dispatcher.clone(), self.fn_name)
166 }
167
168 /// Called by the test helper to end the test.
169 /// public so the macro can call it.
170 pub fn quit(&self) {
171 self.on_quit.borrow_mut().drain(..).for_each(|f| f());
172 self.app.borrow_mut().shutdown();
173 }
174
175 /// Register cleanup to run when the test ends.
176 pub fn on_quit(&mut self, f: impl FnOnce() + 'static) {
177 self.on_quit.borrow_mut().push(Box::new(f));
178 }
179
180 /// Schedules all windows to be redrawn on the next effect cycle.
181 pub fn refresh(&mut self) -> Result<()> {
182 let mut app = self.app.borrow_mut();
183 app.refresh_windows();
184 Ok(())
185 }
186
187 /// Returns an executor (for running tasks in the background)
188 pub fn executor(&self) -> BackgroundExecutor {
189 self.background_executor.clone()
190 }
191
192 /// Returns an executor (for running tasks on the main thread)
193 pub fn foreground_executor(&self) -> &ForegroundExecutor {
194 &self.foreground_executor
195 }
196
197 #[expect(clippy::wrong_self_convention)]
198 fn new<T: 'static>(&mut self, build_entity: impl FnOnce(&mut Context<T>) -> T) -> Entity<T> {
199 let mut cx = self.app.borrow_mut();
200 cx.new(build_entity)
201 }
202
203 /// Gives you an `&mut App` for the duration of the closure
204 pub fn update<R>(&self, f: impl FnOnce(&mut App) -> R) -> R {
205 let mut cx = self.app.borrow_mut();
206 cx.update(f)
207 }
208
209 /// Gives you an `&App` for the duration of the closure
210 pub fn read<R>(&self, f: impl FnOnce(&App) -> R) -> R {
211 let cx = self.app.borrow();
212 f(&cx)
213 }
214
215 /// Adds a new window. The Window will always be backed by a `TestWindow` which
216 /// can be retrieved with `self.test_window(handle)`
217 pub fn add_window<F, V>(&mut self, build_window: F) -> WindowHandle<V>
218 where
219 F: FnOnce(&mut Window, &mut Context<V>) -> V,
220 V: 'static + Render,
221 {
222 let mut cx = self.app.borrow_mut();
223
224 // Some tests rely on the window size matching the bounds of the test display
225 let bounds = Bounds::maximized(None, &cx);
226 cx.open_window(
227 WindowOptions {
228 window_bounds: Some(WindowBounds::Windowed(bounds)),
229 ..Default::default()
230 },
231 |window, cx| cx.new(|cx| build_window(window, cx)),
232 )
233 .unwrap()
234 }
235
236 /// Adds a new window with no content.
237 pub fn add_empty_window(&mut self) -> &mut VisualTestContext {
238 let mut cx = self.app.borrow_mut();
239 let bounds = Bounds::maximized(None, &cx);
240 let window = cx
241 .open_window(
242 WindowOptions {
243 window_bounds: Some(WindowBounds::Windowed(bounds)),
244 ..Default::default()
245 },
246 |_, cx| cx.new(|_| Empty),
247 )
248 .unwrap();
249 drop(cx);
250 let cx = VisualTestContext::from_window(*window.deref(), self).into_mut();
251 cx.run_until_parked();
252 cx
253 }
254
255 /// Adds a new window, and returns its root view and a `VisualTestContext` which can be used
256 /// as a `Window` and `App` for the rest of the test. Typically you would shadow this context with
257 /// the returned one. `let (view, cx) = cx.add_window_view(...);`
258 pub fn add_window_view<F, V>(
259 &mut self,
260 build_root_view: F,
261 ) -> (Entity<V>, &mut VisualTestContext)
262 where
263 F: FnOnce(&mut Window, &mut Context<V>) -> V,
264 V: 'static + Render,
265 {
266 let mut cx = self.app.borrow_mut();
267 let bounds = Bounds::maximized(None, &cx);
268 let window = cx
269 .open_window(
270 WindowOptions {
271 window_bounds: Some(WindowBounds::Windowed(bounds)),
272 ..Default::default()
273 },
274 |window, cx| cx.new(|cx| build_root_view(window, cx)),
275 )
276 .unwrap();
277 drop(cx);
278 let view = window.root(self).unwrap();
279 let cx = VisualTestContext::from_window(*window.deref(), self).into_mut();
280 cx.run_until_parked();
281
282 // it might be nice to try and cleanup these at the end of each test.
283 (view, cx)
284 }
285
286 /// returns the TextSystem
287 pub fn text_system(&self) -> &Arc<TextSystem> {
288 &self.text_system
289 }
290
291 /// Simulates writing to the platform clipboard
292 pub fn write_to_clipboard(&self, item: ClipboardItem) {
293 self.test_platform.write_to_clipboard(item)
294 }
295
296 /// Simulates reading from the platform clipboard.
297 /// This will return the most recent value from `write_to_clipboard`.
298 pub fn read_from_clipboard(&self) -> Option<ClipboardItem> {
299 self.test_platform.read_from_clipboard()
300 }
301
302 /// Simulates choosing a File in the platform's "Open" dialog.
303 pub fn simulate_new_path_selection(
304 &self,
305 select_path: impl FnOnce(&std::path::Path) -> Option<std::path::PathBuf>,
306 ) {
307 self.test_platform.simulate_new_path_selection(select_path);
308 }
309
310 /// Simulates clicking a button in an platform-level alert dialog.
311 #[track_caller]
312 pub fn simulate_prompt_answer(&self, button: &str) {
313 self.test_platform.simulate_prompt_answer(button);
314 }
315
316 /// Returns true if there's an alert dialog open.
317 pub fn has_pending_prompt(&self) -> bool {
318 self.test_platform.has_pending_prompt()
319 }
320
321 /// Returns true if there's an alert dialog open.
322 pub fn pending_prompt(&self) -> Option<(String, String)> {
323 self.test_platform.pending_prompt()
324 }
325
326 /// All the urls that have been opened with cx.open_url() during this test.
327 pub fn opened_url(&self) -> Option<String> {
328 self.test_platform.opened_url.borrow().clone()
329 }
330
331 /// Simulates the user resizing the window to the new size.
332 pub fn simulate_window_resize(&self, window_handle: AnyWindowHandle, size: Size<Pixels>) {
333 self.test_window(window_handle).simulate_resize(size);
334 }
335
336 /// Returns true if there's an alert dialog open.
337 pub fn expect_restart(&self) -> oneshot::Receiver<Option<PathBuf>> {
338 let (tx, rx) = futures::channel::oneshot::channel();
339 self.test_platform.expect_restart.borrow_mut().replace(tx);
340 rx
341 }
342
343 /// Causes the given sources to be returned if the application queries for screen
344 /// capture sources.
345 pub fn set_screen_capture_sources(&self, sources: Vec<TestScreenCaptureSource>) {
346 self.test_platform.set_screen_capture_sources(sources);
347 }
348
349 /// Returns all windows open in the test.
350 pub fn windows(&self) -> Vec<AnyWindowHandle> {
351 self.app.borrow().windows()
352 }
353
354 /// Run the given task on the main thread.
355 #[track_caller]
356 pub fn spawn<Fut, R>(&self, f: impl FnOnce(AsyncApp) -> Fut) -> Task<R>
357 where
358 Fut: Future<Output = R> + 'static,
359 R: 'static,
360 {
361 self.foreground_executor.spawn(f(self.to_async()))
362 }
363
364 /// true if the given global is defined
365 pub fn has_global<G: Global>(&self) -> bool {
366 let app = self.app.borrow();
367 app.has_global::<G>()
368 }
369
370 /// runs the given closure with a reference to the global
371 /// panics if `has_global` would return false.
372 pub fn read_global<G: Global, R>(&self, read: impl FnOnce(&G, &App) -> R) -> R {
373 let app = self.app.borrow();
374 read(app.global(), &app)
375 }
376
377 /// runs the given closure with a reference to the global (if set)
378 pub fn try_read_global<G: Global, R>(&self, read: impl FnOnce(&G, &App) -> R) -> Option<R> {
379 let lock = self.app.borrow();
380 Some(read(lock.try_global()?, &lock))
381 }
382
383 /// sets the global in this context.
384 pub fn set_global<G: Global>(&mut self, global: G) {
385 let mut lock = self.app.borrow_mut();
386 lock.update(|cx| cx.set_global(global))
387 }
388
389 /// updates the global in this context. (panics if `has_global` would return false)
390 pub fn update_global<G: Global, R>(&mut self, update: impl FnOnce(&mut G, &mut App) -> R) -> R {
391 let mut lock = self.app.borrow_mut();
392 lock.update(|cx| cx.update_global(update))
393 }
394
395 /// Returns an `AsyncApp` which can be used to run tasks that expect to be on a background
396 /// thread on the current thread in tests.
397 pub fn to_async(&self) -> AsyncApp {
398 AsyncApp {
399 app: Rc::downgrade(&self.app),
400 background_executor: self.background_executor.clone(),
401 foreground_executor: self.foreground_executor.clone(),
402 }
403 }
404
405 /// Wait until there are no more pending tasks.
406 pub fn run_until_parked(&mut self) {
407 self.background_executor.run_until_parked()
408 }
409
410 /// Simulate dispatching an action to the currently focused node in the window.
411 pub fn dispatch_action<A>(&mut self, window: AnyWindowHandle, action: A)
412 where
413 A: Action,
414 {
415 window
416 .update(self, |_, window, cx| {
417 window.dispatch_action(action.boxed_clone(), cx)
418 })
419 .unwrap();
420
421 self.background_executor.run_until_parked()
422 }
423
424 /// simulate_keystrokes takes a space-separated list of keys to type.
425 /// cx.simulate_keystrokes("cmd-shift-p b k s p enter")
426 /// in Zed, this will run backspace on the current editor through the command palette.
427 /// This will also run the background executor until it's parked.
428 pub fn simulate_keystrokes(&mut self, window: AnyWindowHandle, keystrokes: &str) {
429 for keystroke in keystrokes
430 .split(' ')
431 .map(Keystroke::parse)
432 .map(Result::unwrap)
433 {
434 self.dispatch_keystroke(window, keystroke);
435 }
436
437 self.background_executor.run_until_parked()
438 }
439
440 /// simulate_input takes a string of text to type.
441 /// cx.simulate_input("abc")
442 /// will type abc into your current editor
443 /// This will also run the background executor until it's parked.
444 pub fn simulate_input(&mut self, window: AnyWindowHandle, input: &str) {
445 for keystroke in input.split("").map(Keystroke::parse).map(Result::unwrap) {
446 self.dispatch_keystroke(window, keystroke);
447 }
448
449 self.background_executor.run_until_parked()
450 }
451
452 /// dispatches a single Keystroke (see also `simulate_keystrokes` and `simulate_input`)
453 pub fn dispatch_keystroke(&mut self, window: AnyWindowHandle, keystroke: Keystroke) {
454 self.update_window(window, |_, window, cx| {
455 window.dispatch_keystroke(keystroke, cx)
456 })
457 .unwrap();
458 }
459
460 /// Returns the `TestWindow` backing the given handle.
461 pub(crate) fn test_window(&self, window: AnyWindowHandle) -> TestWindow {
462 self.app
463 .borrow_mut()
464 .windows
465 .get_mut(window.id)
466 .unwrap()
467 .as_deref_mut()
468 .unwrap()
469 .platform_window
470 .as_test()
471 .unwrap()
472 .clone()
473 }
474
475 /// Returns a stream of notifications whenever the Entity is updated.
476 pub fn notifications<T: 'static>(
477 &mut self,
478 entity: &Entity<T>,
479 ) -> impl Stream<Item = ()> + use<T> {
480 let (tx, rx) = futures::channel::mpsc::unbounded();
481 self.update(|cx| {
482 cx.observe(entity, {
483 let tx = tx.clone();
484 move |_, _| {
485 let _ = tx.unbounded_send(());
486 }
487 })
488 .detach();
489 cx.observe_release(entity, move |_, _| tx.close_channel())
490 .detach()
491 });
492 rx
493 }
494
495 /// Returns a stream of events emitted by the given Entity.
496 pub fn events<Evt, T: 'static + EventEmitter<Evt>>(
497 &mut self,
498 entity: &Entity<T>,
499 ) -> futures::channel::mpsc::UnboundedReceiver<Evt>
500 where
501 Evt: 'static + Clone,
502 {
503 let (tx, rx) = futures::channel::mpsc::unbounded();
504 entity
505 .update(self, |_, cx: &mut Context<T>| {
506 cx.subscribe(entity, move |_entity, _handle, event, _cx| {
507 let _ = tx.unbounded_send(event.clone());
508 })
509 })
510 .detach();
511 rx
512 }
513
514 /// Runs until the given condition becomes true. (Prefer `run_until_parked` if you
515 /// don't need to jump in at a specific time).
516 pub async fn condition<T: 'static>(
517 &mut self,
518 entity: &Entity<T>,
519 mut predicate: impl FnMut(&mut T, &mut Context<T>) -> bool,
520 ) {
521 let timer = self.executor().timer(Duration::from_secs(3));
522 let mut notifications = self.notifications(entity);
523
524 use futures::FutureExt as _;
525 use smol::future::FutureExt as _;
526
527 async {
528 loop {
529 if entity.update(self, &mut predicate) {
530 return Ok(());
531 }
532
533 if notifications.next().await.is_none() {
534 bail!("entity dropped")
535 }
536 }
537 }
538 .race(timer.map(|_| Err(anyhow!("condition timed out"))))
539 .await
540 .unwrap();
541 }
542
543 /// Set a name for this App.
544 #[cfg(any(test, feature = "test-support"))]
545 pub fn set_name(&mut self, name: &'static str) {
546 self.update(|cx| cx.name = Some(name))
547 }
548}
549
550impl<T: 'static> Entity<T> {
551 /// Block until the next event is emitted by the entity, then return it.
552 pub fn next_event<Event>(&self, cx: &mut TestAppContext) -> impl Future<Output = Event>
553 where
554 Event: Send + Clone + 'static,
555 T: EventEmitter<Event>,
556 {
557 let (tx, mut rx) = oneshot::channel();
558 let mut tx = Some(tx);
559 let subscription = self.update(cx, |_, cx| {
560 cx.subscribe(self, move |_, _, event, _| {
561 if let Some(tx) = tx.take() {
562 _ = tx.send(event.clone());
563 }
564 })
565 });
566
567 async move {
568 let event = rx.await.expect("no event emitted");
569 drop(subscription);
570 event
571 }
572 }
573}
574
575impl<V: 'static> Entity<V> {
576 /// Returns a future that resolves when the view is next updated.
577 pub fn next_notification(
578 &self,
579 advance_clock_by: Duration,
580 cx: &TestAppContext,
581 ) -> impl Future<Output = ()> {
582 use postage::prelude::{Sink as _, Stream as _};
583
584 let (mut tx, mut rx) = postage::mpsc::channel(1);
585 let subscription = cx.app.borrow_mut().observe(self, move |_, _| {
586 tx.try_send(()).ok();
587 });
588
589 let duration = if std::env::var("CI").is_ok() {
590 Duration::from_secs(5)
591 } else {
592 Duration::from_secs(1)
593 };
594
595 cx.executor().advance_clock(advance_clock_by);
596
597 async move {
598 let notification = crate::util::smol_timeout(duration, rx.recv())
599 .await
600 .expect("next notification timed out");
601 drop(subscription);
602 notification.expect("entity dropped while test was waiting for its next notification")
603 }
604 }
605}
606
607impl<V> Entity<V> {
608 /// Returns a future that resolves when the condition becomes true.
609 pub fn condition<Evt>(
610 &self,
611 cx: &TestAppContext,
612 mut predicate: impl FnMut(&V, &App) -> bool,
613 ) -> impl Future<Output = ()>
614 where
615 Evt: 'static,
616 V: EventEmitter<Evt>,
617 {
618 use postage::prelude::{Sink as _, Stream as _};
619
620 let (tx, mut rx) = postage::mpsc::channel(1024);
621
622 let mut cx = cx.app.borrow_mut();
623 let subscriptions = (
624 cx.observe(self, {
625 let mut tx = tx.clone();
626 move |_, _| {
627 tx.blocking_send(()).ok();
628 }
629 }),
630 cx.subscribe(self, {
631 let mut tx = tx;
632 move |_, _: &Evt, _| {
633 tx.blocking_send(()).ok();
634 }
635 }),
636 );
637
638 let cx = cx.this.upgrade().unwrap();
639 let handle = self.downgrade();
640
641 async move {
642 crate::util::smol_timeout(Duration::from_secs(1), async move {
643 loop {
644 {
645 let cx = cx.borrow();
646 let cx = &*cx;
647 if predicate(
648 handle
649 .upgrade()
650 .expect("view dropped with pending condition")
651 .read(cx),
652 cx,
653 ) {
654 break;
655 }
656 }
657
658 cx.borrow().background_executor().start_waiting();
659 rx.recv()
660 .await
661 .expect("view dropped with pending condition");
662 cx.borrow().background_executor().finish_waiting();
663 }
664 })
665 .await
666 .expect("condition timed out");
667 drop(subscriptions);
668 }
669 }
670}
671
672use derive_more::{Deref, DerefMut};
673
674use super::{Context, Entity};
675#[derive(Deref, DerefMut, Clone)]
676/// A VisualTestContext is the test-equivalent of a `Window` and `App`. It allows you to
677/// run window-specific test code. It can be dereferenced to a `TextAppContext`.
678pub struct VisualTestContext {
679 #[deref]
680 #[deref_mut]
681 /// cx is the original TestAppContext (you can more easily access this using Deref)
682 pub cx: TestAppContext,
683 window: AnyWindowHandle,
684}
685
686impl VisualTestContext {
687 /// Provides a `Window` and `App` for the duration of the closure.
688 pub fn update<R>(&mut self, f: impl FnOnce(&mut Window, &mut App) -> R) -> R {
689 self.cx
690 .update_window(self.window, |_, window, cx| f(window, cx))
691 .unwrap()
692 }
693
694 /// Creates a new VisualTestContext. You would typically shadow the passed in
695 /// TestAppContext with this, as this is typically more useful.
696 /// `let cx = VisualTestContext::from_window(window, cx);`
697 pub fn from_window(window: AnyWindowHandle, cx: &TestAppContext) -> Self {
698 Self {
699 cx: cx.clone(),
700 window,
701 }
702 }
703
704 /// Wait until there are no more pending tasks.
705 pub fn run_until_parked(&self) {
706 self.cx.background_executor.run_until_parked();
707 }
708
709 /// Dispatch the action to the currently focused node.
710 pub fn dispatch_action<A>(&mut self, action: A)
711 where
712 A: Action,
713 {
714 self.cx.dispatch_action(self.window, action)
715 }
716
717 /// Read the title off the window (set by `Window#set_window_title`)
718 pub fn window_title(&mut self) -> Option<String> {
719 self.cx.test_window(self.window).0.lock().title.clone()
720 }
721
722 /// Simulate a sequence of keystrokes `cx.simulate_keystrokes("cmd-p escape")`
723 /// Automatically runs until parked.
724 pub fn simulate_keystrokes(&mut self, keystrokes: &str) {
725 self.cx.simulate_keystrokes(self.window, keystrokes)
726 }
727
728 /// Simulate typing text `cx.simulate_input("hello")`
729 /// Automatically runs until parked.
730 pub fn simulate_input(&mut self, input: &str) {
731 self.cx.simulate_input(self.window, input)
732 }
733
734 /// Simulate a mouse move event to the given point
735 pub fn simulate_mouse_move(
736 &mut self,
737 position: Point<Pixels>,
738 button: impl Into<Option<MouseButton>>,
739 modifiers: Modifiers,
740 ) {
741 self.simulate_event(MouseMoveEvent {
742 position,
743 modifiers,
744 pressed_button: button.into(),
745 })
746 }
747
748 /// Simulate a mouse down event to the given point
749 pub fn simulate_mouse_down(
750 &mut self,
751 position: Point<Pixels>,
752 button: MouseButton,
753 modifiers: Modifiers,
754 ) {
755 self.simulate_event(MouseDownEvent {
756 position,
757 modifiers,
758 button,
759 click_count: 1,
760 first_mouse: false,
761 })
762 }
763
764 /// Simulate a mouse up event to the given point
765 pub fn simulate_mouse_up(
766 &mut self,
767 position: Point<Pixels>,
768 button: MouseButton,
769 modifiers: Modifiers,
770 ) {
771 self.simulate_event(MouseUpEvent {
772 position,
773 modifiers,
774 button,
775 click_count: 1,
776 })
777 }
778
779 /// Simulate a primary mouse click at the given point
780 pub fn simulate_click(&mut self, position: Point<Pixels>, modifiers: Modifiers) {
781 self.simulate_event(MouseDownEvent {
782 position,
783 modifiers,
784 button: MouseButton::Left,
785 click_count: 1,
786 first_mouse: false,
787 });
788 self.simulate_event(MouseUpEvent {
789 position,
790 modifiers,
791 button: MouseButton::Left,
792 click_count: 1,
793 });
794 }
795
796 /// Simulate a modifiers changed event
797 pub fn simulate_modifiers_change(&mut self, modifiers: Modifiers) {
798 self.simulate_event(ModifiersChangedEvent {
799 modifiers,
800 capslock: Capslock { on: false },
801 })
802 }
803
804 /// Simulate a capslock changed event
805 pub fn simulate_capslock_change(&mut self, on: bool) {
806 self.simulate_event(ModifiersChangedEvent {
807 modifiers: Modifiers::none(),
808 capslock: Capslock { on },
809 })
810 }
811
812 /// Simulates the user resizing the window to the new size.
813 pub fn simulate_resize(&self, size: Size<Pixels>) {
814 self.simulate_window_resize(self.window, size)
815 }
816
817 /// debug_bounds returns the bounds of the element with the given selector.
818 pub fn debug_bounds(&mut self, selector: &'static str) -> Option<Bounds<Pixels>> {
819 self.update(|window, _| window.rendered_frame.debug_bounds.get(selector).copied())
820 }
821
822 /// Draw an element to the window. Useful for simulating events or actions
823 pub fn draw<E>(
824 &mut self,
825 origin: Point<Pixels>,
826 space: impl Into<Size<AvailableSpace>>,
827 f: impl FnOnce(&mut Window, &mut App) -> E,
828 ) -> (E::RequestLayoutState, E::PrepaintState)
829 where
830 E: Element,
831 {
832 self.update(|window, cx| {
833 window.invalidator.set_phase(DrawPhase::Prepaint);
834 let mut element = Drawable::new(f(window, cx));
835 element.layout_as_root(space.into(), window, cx);
836 window.with_absolute_element_offset(origin, |window| element.prepaint(window, cx));
837
838 window.invalidator.set_phase(DrawPhase::Paint);
839 let (request_layout_state, prepaint_state) = element.paint(window, cx);
840
841 window.invalidator.set_phase(DrawPhase::None);
842 window.refresh();
843
844 (request_layout_state, prepaint_state)
845 })
846 }
847
848 /// Simulate an event from the platform, e.g. a ScrollWheelEvent
849 /// Make sure you've called [VisualTestContext::draw] first!
850 pub fn simulate_event<E: InputEvent>(&mut self, event: E) {
851 self.test_window(self.window)
852 .simulate_input(event.to_platform_input());
853 self.background_executor.run_until_parked();
854 }
855
856 /// Simulates the user blurring the window.
857 pub fn deactivate_window(&mut self) {
858 if Some(self.window) == self.test_platform.active_window() {
859 self.test_platform.set_active_window(None)
860 }
861 self.background_executor.run_until_parked();
862 }
863
864 /// Simulates the user closing the window.
865 /// Returns true if the window was closed.
866 pub fn simulate_close(&mut self) -> bool {
867 let handler = self
868 .cx
869 .update_window(self.window, |_, window, _| {
870 window
871 .platform_window
872 .as_test()
873 .unwrap()
874 .0
875 .lock()
876 .should_close_handler
877 .take()
878 })
879 .unwrap();
880 if let Some(mut handler) = handler {
881 let should_close = handler();
882 self.cx
883 .update_window(self.window, |_, window, _| {
884 window.platform_window.on_should_close(handler);
885 })
886 .unwrap();
887 should_close
888 } else {
889 false
890 }
891 }
892
893 /// Get an &mut VisualTestContext (which is mostly what you need to pass to other methods).
894 /// This method internally retains the VisualTestContext until the end of the test.
895 pub fn into_mut(self) -> &'static mut Self {
896 let ptr = Box::into_raw(Box::new(self));
897 // safety: on_quit will be called after the test has finished.
898 // the executor will ensure that all tasks related to the test have stopped.
899 // so there is no way for cx to be accessed after on_quit is called.
900 // todo: This is unsound under stacked borrows (also tree borrows probably?)
901 // the mutable reference invalidates `ptr` which is later used in the closure
902 let cx = unsafe { &mut *ptr };
903 cx.on_quit(move || unsafe {
904 drop(Box::from_raw(ptr));
905 });
906 cx
907 }
908}
909
910impl AppContext for VisualTestContext {
911 type Result<T> = <TestAppContext as AppContext>::Result<T>;
912
913 fn new<T: 'static>(
914 &mut self,
915 build_entity: impl FnOnce(&mut Context<T>) -> T,
916 ) -> Self::Result<Entity<T>> {
917 self.cx.new(build_entity)
918 }
919
920 fn reserve_entity<T: 'static>(&mut self) -> Self::Result<crate::Reservation<T>> {
921 self.cx.reserve_entity()
922 }
923
924 fn insert_entity<T: 'static>(
925 &mut self,
926 reservation: crate::Reservation<T>,
927 build_entity: impl FnOnce(&mut Context<T>) -> T,
928 ) -> Self::Result<Entity<T>> {
929 self.cx.insert_entity(reservation, build_entity)
930 }
931
932 fn update_entity<T, R>(
933 &mut self,
934 handle: &Entity<T>,
935 update: impl FnOnce(&mut T, &mut Context<T>) -> R,
936 ) -> Self::Result<R>
937 where
938 T: 'static,
939 {
940 self.cx.update_entity(handle, update)
941 }
942
943 fn as_mut<'a, T>(&'a mut self, handle: &Entity<T>) -> Self::Result<super::GpuiBorrow<'a, T>>
944 where
945 T: 'static,
946 {
947 self.cx.as_mut(handle)
948 }
949
950 fn read_entity<T, R>(
951 &self,
952 handle: &Entity<T>,
953 read: impl FnOnce(&T, &App) -> R,
954 ) -> Self::Result<R>
955 where
956 T: 'static,
957 {
958 self.cx.read_entity(handle, read)
959 }
960
961 fn update_window<T, F>(&mut self, window: AnyWindowHandle, f: F) -> Result<T>
962 where
963 F: FnOnce(AnyView, &mut Window, &mut App) -> T,
964 {
965 self.cx.update_window(window, f)
966 }
967
968 fn read_window<T, R>(
969 &self,
970 window: &WindowHandle<T>,
971 read: impl FnOnce(Entity<T>, &App) -> R,
972 ) -> Result<R>
973 where
974 T: 'static,
975 {
976 self.cx.read_window(window, read)
977 }
978
979 fn background_spawn<R>(&self, future: impl Future<Output = R> + Send + 'static) -> Task<R>
980 where
981 R: Send + 'static,
982 {
983 self.cx.background_spawn(future)
984 }
985
986 fn read_global<G, R>(&self, callback: impl FnOnce(&G, &App) -> R) -> Self::Result<R>
987 where
988 G: Global,
989 {
990 self.cx.read_global(callback)
991 }
992}
993
994impl VisualContext for VisualTestContext {
995 /// Get the underlying window handle underlying this context.
996 fn window_handle(&self) -> AnyWindowHandle {
997 self.window
998 }
999
1000 fn new_window_entity<T: 'static>(
1001 &mut self,
1002 build_entity: impl FnOnce(&mut Window, &mut Context<T>) -> T,
1003 ) -> Self::Result<Entity<T>> {
1004 self.window
1005 .update(&mut self.cx, |_, window, cx| {
1006 cx.new(|cx| build_entity(window, cx))
1007 })
1008 .unwrap()
1009 }
1010
1011 fn update_window_entity<V: 'static, R>(
1012 &mut self,
1013 view: &Entity<V>,
1014 update: impl FnOnce(&mut V, &mut Window, &mut Context<V>) -> R,
1015 ) -> Self::Result<R> {
1016 self.window
1017 .update(&mut self.cx, |_, window, cx| {
1018 view.update(cx, |v, cx| update(v, window, cx))
1019 })
1020 .unwrap()
1021 }
1022
1023 fn replace_root_view<V>(
1024 &mut self,
1025 build_view: impl FnOnce(&mut Window, &mut Context<V>) -> V,
1026 ) -> Self::Result<Entity<V>>
1027 where
1028 V: 'static + Render,
1029 {
1030 self.window
1031 .update(&mut self.cx, |_, window, cx| {
1032 window.replace_root(cx, build_view)
1033 })
1034 .unwrap()
1035 }
1036
1037 fn focus<V: crate::Focusable>(&mut self, view: &Entity<V>) -> Self::Result<()> {
1038 self.window
1039 .update(&mut self.cx, |_, window, cx| {
1040 view.read(cx).focus_handle(cx).focus(window)
1041 })
1042 .unwrap()
1043 }
1044}
1045
1046impl AnyWindowHandle {
1047 /// Creates the given view in this window.
1048 pub fn build_entity<V: Render + 'static>(
1049 &self,
1050 cx: &mut TestAppContext,
1051 build_view: impl FnOnce(&mut Window, &mut Context<V>) -> V,
1052 ) -> Entity<V> {
1053 self.update(cx, |_, window, cx| cx.new(|cx| build_view(window, cx)))
1054 .unwrap()
1055 }
1056}