1use crate::{
2 div, AnyView, AnyWindowHandle, AppCell, AppContext, AsyncAppContext, BackgroundExecutor,
3 Context, Div, EventEmitter, ForegroundExecutor, InputEvent, KeyDownEvent, Keystroke, Model,
4 ModelContext, Render, Result, Task, TestDispatcher, TestPlatform, View, ViewContext,
5 VisualContext, WindowContext, WindowHandle, WindowOptions,
6};
7use anyhow::{anyhow, bail};
8use futures::{Stream, StreamExt};
9use std::{future::Future, ops::Deref, rc::Rc, sync::Arc, time::Duration};
10
11#[derive(Clone)]
12pub struct TestAppContext {
13 pub app: Rc<AppCell>,
14 pub background_executor: BackgroundExecutor,
15 pub foreground_executor: ForegroundExecutor,
16 pub dispatcher: TestDispatcher,
17}
18
19impl Context for TestAppContext {
20 type Result<T> = T;
21
22 fn build_model<T: 'static>(
23 &mut self,
24 build_model: impl FnOnce(&mut ModelContext<'_, T>) -> T,
25 ) -> Self::Result<Model<T>>
26 where
27 T: 'static,
28 {
29 let mut app = self.app.borrow_mut();
30 app.build_model(build_model)
31 }
32
33 fn update_model<T: 'static, R>(
34 &mut self,
35 handle: &Model<T>,
36 update: impl FnOnce(&mut T, &mut ModelContext<'_, T>) -> R,
37 ) -> Self::Result<R> {
38 let mut app = self.app.borrow_mut();
39 app.update_model(handle, update)
40 }
41
42 fn update_window<T, F>(&mut self, window: AnyWindowHandle, f: F) -> Result<T>
43 where
44 F: FnOnce(AnyView, &mut WindowContext<'_>) -> T,
45 {
46 let mut lock = self.app.borrow_mut();
47 lock.update_window(window, f)
48 }
49
50 fn read_model<T, R>(
51 &self,
52 handle: &Model<T>,
53 read: impl FnOnce(&T, &AppContext) -> R,
54 ) -> Self::Result<R>
55 where
56 T: 'static,
57 {
58 let app = self.app.borrow();
59 app.read_model(handle, read)
60 }
61
62 fn read_window<T, R>(
63 &self,
64 window: &WindowHandle<T>,
65 read: impl FnOnce(View<T>, &AppContext) -> R,
66 ) -> Result<R>
67 where
68 T: 'static,
69 {
70 let app = self.app.borrow();
71 app.read_window(window, read)
72 }
73}
74
75impl TestAppContext {
76 pub fn new(dispatcher: TestDispatcher) -> Self {
77 let arc_dispatcher = Arc::new(dispatcher.clone());
78 let background_executor = BackgroundExecutor::new(arc_dispatcher.clone());
79 let foreground_executor = ForegroundExecutor::new(arc_dispatcher);
80 let platform = Rc::new(TestPlatform::new(
81 background_executor.clone(),
82 foreground_executor.clone(),
83 ));
84 let asset_source = Arc::new(());
85 let http_client = util::http::FakeHttpClient::with_404_response();
86 Self {
87 app: AppContext::new(platform, asset_source, http_client),
88 background_executor,
89 foreground_executor,
90 dispatcher: dispatcher.clone(),
91 }
92 }
93
94 pub fn new_app(&self) -> TestAppContext {
95 Self::new(self.dispatcher.clone())
96 }
97
98 pub fn quit(&self) {
99 self.app.borrow_mut().quit();
100 }
101
102 pub fn refresh(&mut self) -> Result<()> {
103 let mut app = self.app.borrow_mut();
104 app.refresh();
105 Ok(())
106 }
107
108 pub fn executor(&self) -> BackgroundExecutor {
109 self.background_executor.clone()
110 }
111
112 pub fn foreground_executor(&self) -> &ForegroundExecutor {
113 &self.foreground_executor
114 }
115
116 pub fn update<R>(&self, f: impl FnOnce(&mut AppContext) -> R) -> R {
117 let mut cx = self.app.borrow_mut();
118 cx.update(f)
119 }
120
121 pub fn read<R>(&self, f: impl FnOnce(&AppContext) -> R) -> R {
122 let cx = self.app.borrow();
123 f(&*cx)
124 }
125
126 pub fn add_window<F, V>(&mut self, build_window: F) -> WindowHandle<V>
127 where
128 F: FnOnce(&mut ViewContext<V>) -> V,
129 V: Render,
130 {
131 let mut cx = self.app.borrow_mut();
132 cx.open_window(WindowOptions::default(), |cx| cx.build_view(build_window))
133 }
134
135 pub fn add_empty_window(&mut self) -> AnyWindowHandle {
136 let mut cx = self.app.borrow_mut();
137 cx.open_window(WindowOptions::default(), |cx| {
138 cx.build_view(|_| EmptyView {})
139 })
140 .any_handle
141 }
142
143 pub fn add_window_view<F, V>(&mut self, build_window: F) -> (View<V>, VisualTestContext)
144 where
145 F: FnOnce(&mut ViewContext<V>) -> V,
146 V: Render,
147 {
148 let mut cx = self.app.borrow_mut();
149 let window = cx.open_window(WindowOptions::default(), |cx| cx.build_view(build_window));
150 drop(cx);
151 let view = window.root_view(self).unwrap();
152 (view, VisualTestContext::from_window(*window.deref(), self))
153 }
154
155 pub fn spawn<Fut, R>(&self, f: impl FnOnce(AsyncAppContext) -> Fut) -> Task<R>
156 where
157 Fut: Future<Output = R> + 'static,
158 R: 'static,
159 {
160 self.foreground_executor.spawn(f(self.to_async()))
161 }
162
163 pub fn has_global<G: 'static>(&self) -> bool {
164 let app = self.app.borrow();
165 app.has_global::<G>()
166 }
167
168 pub fn read_global<G: 'static, R>(&self, read: impl FnOnce(&G, &AppContext) -> R) -> R {
169 let app = self.app.borrow();
170 read(app.global(), &app)
171 }
172
173 pub fn try_read_global<G: 'static, R>(
174 &self,
175 read: impl FnOnce(&G, &AppContext) -> R,
176 ) -> Option<R> {
177 let lock = self.app.borrow();
178 Some(read(lock.try_global()?, &lock))
179 }
180
181 pub fn set_global<G: 'static>(&mut self, global: G) {
182 let mut lock = self.app.borrow_mut();
183 lock.set_global(global);
184 }
185
186 pub fn update_global<G: 'static, R>(
187 &mut self,
188 update: impl FnOnce(&mut G, &mut AppContext) -> R,
189 ) -> R {
190 let mut lock = self.app.borrow_mut();
191 lock.update_global(update)
192 }
193
194 pub fn to_async(&self) -> AsyncAppContext {
195 AsyncAppContext {
196 app: Rc::downgrade(&self.app),
197 background_executor: self.background_executor.clone(),
198 foreground_executor: self.foreground_executor.clone(),
199 }
200 }
201
202 pub fn dispatch_keystroke(
203 &mut self,
204 window: AnyWindowHandle,
205 keystroke: Keystroke,
206 is_held: bool,
207 ) {
208 let handled = window
209 .update(self, |_, cx| {
210 cx.dispatch_event(InputEvent::KeyDown(KeyDownEvent { keystroke, is_held }))
211 })
212 .is_ok_and(|handled| handled);
213
214 if !handled {
215 // todo!() simluate input here
216 }
217 }
218
219 pub fn notifications<T: 'static>(&mut self, entity: &Model<T>) -> impl Stream<Item = ()> {
220 let (tx, rx) = futures::channel::mpsc::unbounded();
221
222 entity.update(self, move |_, cx: &mut ModelContext<T>| {
223 cx.observe(entity, {
224 let tx = tx.clone();
225 move |_, _, _| {
226 let _ = tx.unbounded_send(());
227 }
228 })
229 .detach();
230
231 cx.on_release(move |_, _| tx.close_channel()).detach();
232 });
233
234 rx
235 }
236
237 pub fn events<Evt, T: 'static + EventEmitter<Evt>>(
238 &mut self,
239 entity: &Model<T>,
240 ) -> futures::channel::mpsc::UnboundedReceiver<Evt>
241 where
242 Evt: 'static + Clone,
243 {
244 let (tx, rx) = futures::channel::mpsc::unbounded();
245 entity
246 .update(self, |_, cx: &mut ModelContext<T>| {
247 cx.subscribe(entity, move |_model, _handle, event, _cx| {
248 let _ = tx.unbounded_send(event.clone());
249 })
250 })
251 .detach();
252 rx
253 }
254
255 pub async fn condition<T: 'static>(
256 &mut self,
257 model: &Model<T>,
258 mut predicate: impl FnMut(&mut T, &mut ModelContext<T>) -> bool,
259 ) {
260 let timer = self.executor().timer(Duration::from_secs(3));
261 let mut notifications = self.notifications(model);
262
263 use futures::FutureExt as _;
264 use smol::future::FutureExt as _;
265
266 async {
267 while notifications.next().await.is_some() {
268 if model.update(self, &mut predicate) {
269 return Ok(());
270 }
271 }
272 bail!("model dropped")
273 }
274 .race(timer.map(|_| Err(anyhow!("condition timed out"))))
275 .await
276 .unwrap();
277 }
278}
279
280impl<T: Send> Model<T> {
281 pub fn next_event<Evt>(&self, cx: &mut TestAppContext) -> Evt
282 where
283 Evt: Send + Clone + 'static,
284 T: EventEmitter<Evt>,
285 {
286 let (tx, mut rx) = futures::channel::mpsc::unbounded();
287 let _subscription = self.update(cx, |_, cx| {
288 cx.subscribe(self, move |_, _, event, _| {
289 tx.unbounded_send(event.clone()).ok();
290 })
291 });
292
293 cx.executor().run_until_parked();
294 rx.try_next()
295 .expect("no event received")
296 .expect("model was dropped")
297 }
298}
299
300impl<V> View<V> {
301 pub fn condition<Evt>(
302 &self,
303 cx: &TestAppContext,
304 mut predicate: impl FnMut(&V, &AppContext) -> bool,
305 ) -> impl Future<Output = ()>
306 where
307 Evt: 'static,
308 V: EventEmitter<Evt>,
309 {
310 use postage::prelude::{Sink as _, Stream as _};
311
312 let (tx, mut rx) = postage::mpsc::channel(1024);
313 let timeout_duration = Duration::from_millis(100); //todo!() cx.condition_duration();
314
315 let mut cx = cx.app.borrow_mut();
316 let subscriptions = (
317 cx.observe(self, {
318 let mut tx = tx.clone();
319 move |_, _| {
320 tx.blocking_send(()).ok();
321 }
322 }),
323 cx.subscribe(self, {
324 let mut tx = tx.clone();
325 move |_, _: &Evt, _| {
326 tx.blocking_send(()).ok();
327 }
328 }),
329 );
330
331 let cx = cx.this.upgrade().unwrap();
332 let handle = self.downgrade();
333
334 async move {
335 crate::util::timeout(timeout_duration, async move {
336 loop {
337 {
338 let cx = cx.borrow();
339 let cx = &*cx;
340 if predicate(
341 handle
342 .upgrade()
343 .expect("view dropped with pending condition")
344 .read(cx),
345 cx,
346 ) {
347 break;
348 }
349 }
350
351 // todo!(start_waiting)
352 // cx.borrow().foreground_executor().start_waiting();
353 rx.recv()
354 .await
355 .expect("view dropped with pending condition");
356 // cx.borrow().foreground_executor().finish_waiting();
357 }
358 })
359 .await
360 .expect("condition timed out");
361 drop(subscriptions);
362 }
363 }
364}
365
366use derive_more::{Deref, DerefMut};
367#[derive(Deref, DerefMut)]
368pub struct VisualTestContext<'a> {
369 #[deref]
370 #[deref_mut]
371 cx: &'a mut TestAppContext,
372 window: AnyWindowHandle,
373}
374
375impl<'a> VisualTestContext<'a> {
376 pub fn from_window(window: AnyWindowHandle, cx: &'a mut TestAppContext) -> Self {
377 Self { cx, window }
378 }
379}
380
381impl<'a> Context for VisualTestContext<'a> {
382 type Result<T> = <TestAppContext as Context>::Result<T>;
383
384 fn build_model<T: 'static>(
385 &mut self,
386 build_model: impl FnOnce(&mut ModelContext<'_, T>) -> T,
387 ) -> Self::Result<Model<T>> {
388 self.cx.build_model(build_model)
389 }
390
391 fn update_model<T, R>(
392 &mut self,
393 handle: &Model<T>,
394 update: impl FnOnce(&mut T, &mut ModelContext<'_, T>) -> R,
395 ) -> Self::Result<R>
396 where
397 T: 'static,
398 {
399 self.cx.update_model(handle, update)
400 }
401
402 fn read_model<T, R>(
403 &self,
404 handle: &Model<T>,
405 read: impl FnOnce(&T, &AppContext) -> R,
406 ) -> Self::Result<R>
407 where
408 T: 'static,
409 {
410 self.cx.read_model(handle, read)
411 }
412
413 fn update_window<T, F>(&mut self, window: AnyWindowHandle, f: F) -> Result<T>
414 where
415 F: FnOnce(AnyView, &mut WindowContext<'_>) -> T,
416 {
417 self.cx.update_window(window, f)
418 }
419
420 fn read_window<T, R>(
421 &self,
422 window: &WindowHandle<T>,
423 read: impl FnOnce(View<T>, &AppContext) -> R,
424 ) -> Result<R>
425 where
426 T: 'static,
427 {
428 self.cx.read_window(window, read)
429 }
430}
431
432impl<'a> VisualContext for VisualTestContext<'a> {
433 fn build_view<V>(
434 &mut self,
435 build_view: impl FnOnce(&mut ViewContext<'_, V>) -> V,
436 ) -> Self::Result<View<V>>
437 where
438 V: 'static + Render,
439 {
440 self.window
441 .update(self.cx, |_, cx| cx.build_view(build_view))
442 .unwrap()
443 }
444
445 fn update_view<V: 'static, R>(
446 &mut self,
447 view: &View<V>,
448 update: impl FnOnce(&mut V, &mut ViewContext<'_, V>) -> R,
449 ) -> Self::Result<R> {
450 self.window
451 .update(self.cx, |_, cx| cx.update_view(view, update))
452 .unwrap()
453 }
454
455 fn replace_root_view<V>(
456 &mut self,
457 build_view: impl FnOnce(&mut ViewContext<'_, V>) -> V,
458 ) -> Self::Result<View<V>>
459 where
460 V: Render,
461 {
462 self.window
463 .update(self.cx, |_, cx| cx.replace_root_view(build_view))
464 .unwrap()
465 }
466}
467
468impl AnyWindowHandle {
469 pub fn build_view<V: Render + 'static>(
470 &self,
471 cx: &mut TestAppContext,
472 build_view: impl FnOnce(&mut ViewContext<'_, V>) -> V,
473 ) -> View<V> {
474 self.update(cx, |_, cx| cx.build_view(build_view)).unwrap()
475 }
476}
477
478pub struct EmptyView {}
479
480impl Render for EmptyView {
481 type Element = Div<Self>;
482
483 fn render(&mut self, _cx: &mut crate::ViewContext<Self>) -> Self::Element {
484 div()
485 }
486}