Add deterministic TestDispatcher

Co-Authored-By: Conrad Irwin <conrad@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>
Co-Authored-By: Kyle Caverly <kyle@zed.dev>

crates/gpui2/src/platform/test/platform.rs

@@ -0,0 +1,194 @@
+use crate::{DisplayId, Executor, Platform, PlatformTextSystem, TestDispatcher};
+use rand::prelude::*;
+use std::sync::Arc;
+
+pub struct TestPlatform {
+    executor: Executor,
+}
+
+impl TestPlatform {
+    pub fn new(seed: u64) -> Self {
+        let rng = StdRng::seed_from_u64(seed);
+        TestPlatform {
+            executor: Executor::new(Arc::new(TestDispatcher::new(rng))),
+        }
+    }
+}
+
+// todo!("implement out what our tests needed in GPUI 1")
+impl Platform for TestPlatform {
+    fn executor(&self) -> Executor {
+        self.executor.clone()
+    }
+
+    fn text_system(&self) -> Arc<dyn PlatformTextSystem> {
+        Arc::new(crate::platform::mac::MacTextSystem::new())
+    }
+
+    fn run(&self, _on_finish_launching: Box<dyn FnOnce()>) {
+        unimplemented!()
+    }
+
+    fn quit(&self) {
+        unimplemented!()
+    }
+
+    fn restart(&self) {
+        unimplemented!()
+    }
+
+    fn activate(&self, _ignoring_other_apps: bool) {
+        unimplemented!()
+    }
+
+    fn hide(&self) {
+        unimplemented!()
+    }
+
+    fn hide_other_apps(&self) {
+        unimplemented!()
+    }
+
+    fn unhide_other_apps(&self) {
+        unimplemented!()
+    }
+
+    fn displays(&self) -> Vec<std::rc::Rc<dyn crate::PlatformDisplay>> {
+        unimplemented!()
+    }
+
+    fn display(&self, _id: DisplayId) -> Option<std::rc::Rc<dyn crate::PlatformDisplay>> {
+        unimplemented!()
+    }
+
+    fn main_window(&self) -> Option<crate::AnyWindowHandle> {
+        unimplemented!()
+    }
+
+    fn open_window(
+        &self,
+        _handle: crate::AnyWindowHandle,
+        _options: crate::WindowOptions,
+    ) -> Box<dyn crate::PlatformWindow> {
+        unimplemented!()
+    }
+
+    fn set_display_link_output_callback(
+        &self,
+        _display_id: DisplayId,
+        _callback: Box<dyn FnMut(&crate::VideoTimestamp, &crate::VideoTimestamp)>,
+    ) {
+        unimplemented!()
+    }
+
+    fn start_display_link(&self, _display_id: DisplayId) {
+        unimplemented!()
+    }
+
+    fn stop_display_link(&self, _display_id: DisplayId) {
+        unimplemented!()
+    }
+
+    fn open_url(&self, _url: &str) {
+        unimplemented!()
+    }
+
+    fn on_open_urls(&self, _callback: Box<dyn FnMut(Vec<String>)>) {
+        unimplemented!()
+    }
+
+    fn prompt_for_paths(
+        &self,
+        _options: crate::PathPromptOptions,
+    ) -> futures::channel::oneshot::Receiver<Option<Vec<std::path::PathBuf>>> {
+        unimplemented!()
+    }
+
+    fn prompt_for_new_path(
+        &self,
+        _directory: &std::path::Path,
+    ) -> futures::channel::oneshot::Receiver<Option<std::path::PathBuf>> {
+        unimplemented!()
+    }
+
+    fn reveal_path(&self, _path: &std::path::Path) {
+        unimplemented!()
+    }
+
+    fn on_become_active(&self, _callback: Box<dyn FnMut()>) {
+        unimplemented!()
+    }
+
+    fn on_resign_active(&self, _callback: Box<dyn FnMut()>) {
+        unimplemented!()
+    }
+
+    fn on_quit(&self, _callback: Box<dyn FnMut()>) {
+        unimplemented!()
+    }
+
+    fn on_reopen(&self, _callback: Box<dyn FnMut()>) {
+        unimplemented!()
+    }
+
+    fn on_event(&self, _callback: Box<dyn FnMut(crate::InputEvent) -> bool>) {
+        unimplemented!()
+    }
+
+    fn os_name(&self) -> &'static str {
+        unimplemented!()
+    }
+
+    fn os_version(&self) -> anyhow::Result<crate::SemanticVersion> {
+        unimplemented!()
+    }
+
+    fn app_version(&self) -> anyhow::Result<crate::SemanticVersion> {
+        unimplemented!()
+    }
+
+    fn app_path(&self) -> anyhow::Result<std::path::PathBuf> {
+        unimplemented!()
+    }
+
+    fn local_timezone(&self) -> time::UtcOffset {
+        unimplemented!()
+    }
+
+    fn path_for_auxiliary_executable(&self, _name: &str) -> anyhow::Result<std::path::PathBuf> {
+        unimplemented!()
+    }
+
+    fn set_cursor_style(&self, _style: crate::CursorStyle) {
+        unimplemented!()
+    }
+
+    fn should_auto_hide_scrollbars(&self) -> bool {
+        unimplemented!()
+    }
+
+    fn write_to_clipboard(&self, _item: crate::ClipboardItem) {
+        unimplemented!()
+    }
+
+    fn read_from_clipboard(&self) -> Option<crate::ClipboardItem> {
+        unimplemented!()
+    }
+
+    fn write_credentials(
+        &self,
+        _url: &str,
+        _username: &str,
+        _password: &[u8],
+    ) -> anyhow::Result<()> {
+        unimplemented!()
+    }
+
+    fn read_credentials(&self, _url: &str) -> anyhow::Result<Option<(String, Vec<u8>)>> {
+        unimplemented!()
+    }
+
+    fn delete_credentials(&self, _url: &str) -> anyhow::Result<()> {
+        unimplemented!()
+    }
+}