1 files changed, 25 insertions, 0 deletions
diff --git a/tests/run.lua b/tests/run.lua
index 1a3536f..1bd0c64 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -4432,6 +4432,31 @@ test("Direct overlays use ordinary priority", function()
   )
 end)
 
+test("Cursor marker overlays the exact cursor byte position", function()
+  local state, transitions = fresh_sequence_state()
+  local host = MemoryHost.new({
+    buffer_lines = { "a\227\129\130b" },
+    cursor = { line = 1, byte_column = 5 },
+  })
+  local feedback = feedback_service.new({
+    host = host,
+    transitions = transitions,
+  })
+  local cursor = host:read_cursor()
+
+  local marker = feedback:create_cursor_marker(cursor, "window-1")
+  local highlight = host:highlights()[marker.identity]
+  same("CleverFCursor", highlight.group)
+  same("window-1", highlight.window)
+  same(domain.Position.new(1, 5), highlight.position)
+  same(feedback_service.Priority.HIGH, highlight.priority)
+  same(marker.identity, state:temporary_overlay_identities()[1])
+
+  truthy(feedback:remove_temporary_overlay(marker))
+  same(nil, host:highlights()[marker.identity])
+  same(0, #state:temporary_overlay_identities())
+end)
+
 for _, item in ipairs(tests) do
   local ok, failure = xpcall(item.body, debug.traceback)
   if not ok then