ElyMark: the shell hears each load; the size limit follows the text (C14.4 r1)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/ely-mark/src/view/tests.rs

@@ -1,8 +1,8 @@
 use std::sync::{Arc, Mutex};
 
-use gpui::{Entity, TestAppContext, VisualTestContext};
+use gpui::{AppContext as _, Entity, TestAppContext, VisualTestContext};
 
-use super::{MarkView, Mode};
+use super::{MarkView, Mode, Reported};
 use crate::engine::{Text, mark};
 use crate::text::Source;
 
@@ -48,14 +48,78 @@ fn typing_reaches_the_text_the_shell_saves(cx: &mut TestAppContext) {
     assert!(modified && changed > 0);
 }
 
+fn current(view: &Entity<MarkView>, cx: &mut VisualTestContext) -> String {
+    view.read_with(cx, |view, _| {
+        view.doc.lock().expect("the text lock").current.clone()
+    })
+}
+
 #[gpui::test]
 fn a_refresh_is_saved_text_and_keeps_no_undo(cx: &mut TestAppContext) {
     let (view, cx) = open("one\n", cx);
-    let disk = Source::decode(b"two\n".to_vec()).expect("reads");
+    view.update(cx, |view, cx| view.adopt("edited\n".into(), cx));
+    cx.run_until_parked();
+    assert!(view.read_with(cx, |view, _| view.modified()));
+    let disk = Source::decode(b"from disk\n".to_vec()).expect("reads");
     view.update(cx, |view, cx| view.refresh(disk, cx));
     cx.run_until_parked();
+    assert_eq!(current(&view, cx), "from disk\n");
     assert!(!view.read_with(cx, |view, _| view.modified()));
-    assert_eq!(view.read_with(cx, |view, _| view.bytes()), 4);
+    view.update_in(cx, |view, window, cx| view.switch(Mode::Source, window, cx));
+    let focus = view.read_with(cx, |view, _| view.focus.clone());
+    cx.update(|window, cx| window.focus(&focus, cx));
+    cx.run_until_parked();
+    cx.simulate_keystrokes("secondary-z");
+    cx.run_until_parked();
+    assert_eq!(current(&view, cx), "from disk\n", "undo stops at the disk");
+}
+
+#[gpui::test]
+fn the_shell_hears_a_load_it_subscribed_to(cx: &mut TestAppContext) {
+    cx.update(ely_gpui_component::init_for_tests);
+    cx.update(|cx| {
+        ely_ui::settings::install_defaults(cx);
+        ely_ui::i18n::install(cx);
+    });
+    let heard = std::rc::Rc::new(std::cell::Cell::new(0));
+    let (count, held) = (
+        heard.clone(),
+        std::rc::Rc::new(std::cell::RefCell::new(None)),
+    );
+    let holder = held.clone();
+    let (_root, cx) = cx.add_window_view(move |window, cx| {
+        let source = Source::decode(b"# Opened\n".to_vec()).expect("reads");
+        let saved = mark(&source.text);
+        let doc = Arc::new(Mutex::new(Text::new(source)));
+        let folder = std::env::temp_dir();
+        let view = cx.new(|cx| MarkView::new(doc, saved, folder, window, cx));
+        // As the shell: subscribed after the view is made.
+        let count = count.clone();
+        cx.subscribe(&view, move |_, _, _: &Reported, _| {
+            count.set(count.get() + 1)
+        })
+        .detach();
+        holder.replace(Some(view));
+        gpui::Empty
+    });
+    cx.run_until_parked();
+    assert!(heard.get() > 0);
+}
+
+#[gpui::test]
+fn a_text_grown_past_the_limit_goes_to_source(cx: &mut TestAppContext) {
+    let (view, cx) = open("# Old\n", cx);
+    let long = "x".repeat(ely_gpui_component::documents::LARGEST_READ + 1);
+    view.update(cx, |view, cx| view.adopt(long, cx));
+    cx.run_until_parked();
+    assert!(view.read_with(cx, |view, _| view.large()));
+    assert_eq!(view.read_with(cx, |view, _| view.mode), Mode::Source);
+    view.update_in(cx, |view, window, cx| {
+        view.switch(Mode::Preview, window, cx)
+    });
+    assert_eq!(view.read_with(cx, |view, _| view.mode), Mode::Source);
+    let outline = view.read_with(cx, |view, cx| view.outline(cx));
+    assert!(outline.is_empty(), "no stale heading: {outline:?}");
 }
 
 #[gpui::test]