audit combobox

crates/core/tests/input.rs

@@ -269,42 +269,45 @@ fn read_only_refuses_edits_but_keeps_selection_and_copy() {
     assert_eq!(clipboard, "lo");
 
     // The caret is suppressed entirely while read-only.
-    let caret = cx.update(|cx| state.update(cx, |state, cx| state.caret_visible(true, cx)));
+    let caret = cx.update(|cx| state.update(cx, |state, _| state.caret_visible(true)));
     assert!(!caret);
 }
 
 #[test]
-fn caret_blinks_while_focused_and_holds_solid_while_typing() {
+fn the_caret_visibility_is_pure_time_math_against_the_epoch() {
     let (cx, state, mut visual) = input_window("", false);
     focus(&mut visual, &state);
-    visual.update(|window, cx| {
-        window.draw(cx).clear(cx);
-    });
-    visual.run_until_parked();
+    let caret = || cx.update(|cx| state.update(cx, |state, _| state.caret_visible(true)));
 
-    let caret = || cx.update(|cx| state.update(cx, |state, cx| state.caret_visible(true, cx)));
-
-    // The caret shows on focus, hides after one interval, and reappears
-    // after another.
-    assert!(caret());
-    cx.executor().advance_clock(Duration::from_millis(500));
-    visual.run_until_parked();
-    assert!(!caret());
-    cx.executor().advance_clock(Duration::from_millis(500));
-    visual.run_until_parked();
+    // Fresh focus starts a new epoch: the caret shows solid — the elapsed
+    // time since the epoch began is microseconds, far under one interval.
     assert!(caret());
 
-    // Typing holds the caret solid and restarts the cycle.
+    // Typing restarts the epoch, so the caret stays solid through edits.
     visual.simulate_keystrokes("a");
     assert!(caret());
-    cx.executor().advance_clock(Duration::from_millis(500));
-    visual.run_until_parked();
-    assert!(!caret());
 
-    // An unfocused field reports no caret.
-    let caret_unfocused =
-        cx.update(|cx| state.update(cx, |state, cx| state.caret_visible(false, cx)));
-    assert!(!caret_unfocused);
+    // The blink cadence itself: hidden in the second half of the cycle.
+    let hidden = cx.update(|cx| {
+        state.update(cx, |state, _| {
+            state.caret_blink_visible_at(true, Duration::from_millis(700))
+        })
+    });
+    assert!(!hidden);
+    let visible = cx.update(|cx| {
+        state.update(cx, |state, _| {
+            state.caret_blink_visible_at(true, Duration::from_millis(300))
+        })
+    });
+    assert!(visible);
+
+    // An unfocused field reports no caret, at any point in the cycle.
+    let unfocused = cx.update(|cx| {
+        state.update(cx, |state, _| {
+            state.caret_blink_visible_at(false, Duration::from_millis(100))
+        })
+    });
+    assert!(!unfocused);
 }
 
 #[test]