Add gpui helpers

crates/gpui/src/app/test_context.rs

@@ -178,7 +178,14 @@ impl TestAppContext {
         &self.foreground_executor
     }
 
-    fn new<T: 'static>(&mut self, build_entity: impl FnOnce(&mut Context<T>) -> T) -> Entity<T> {
+    /// Builds an entity that is owned by the application.
+    ///
+    /// The given function will be invoked with a [`Context`] and must return an object representing the entity. An
+    /// [`Entity`] handle will be returned, which can be used to access the entity in a context.
+    pub fn new<T: 'static>(
+        &mut self,
+        build_entity: impl FnOnce(&mut Context<T>) -> T,
+    ) -> Entity<T> {
         let mut cx = self.app.borrow_mut();
         cx.new(build_entity)
     }

crates/gpui/src/executor.rs

@@ -95,6 +95,13 @@ where
             .spawn(self.log_tracked_err(*location))
             .detach();
     }
+
+    /// Convert a Task<Result<T, E>> to a Task<()> that logs all errors.
+    pub fn log_err_in_task(self, cx: &App) -> Task<Option<T>> {
+        let location = core::panic::Location::caller();
+        cx.foreground_executor()
+            .spawn(async move { self.log_tracked_err(*location).await })
+    }
 }
 
 impl<T> Future for Task<T> {