From 573556d69a64d2b044996e1b7eac986027b9dfda Mon Sep 17 00:00:00 2001
From: Jackson Moore <jacksonmoore@tuta.io>
Date: Fri, 4 Sep 2026 11:44:04 +0200
Subject: Count uppercase smart-case folds

---
 tests/run.lua | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'tests/run.lua')

diff --git a/tests/run.lua b/tests/run.lua
index ba6757f..4984fb6 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -4692,6 +4692,24 @@ test("Smart-case previews increment every exact character counter", function()
   same(domain.Position.new(1, 5), positions[2])
 end)
 
+test("Smart-case previews add ASCII uppercase to lowercase counters", function()
+  local planner = direct_preview_planner.new({ lowercase = string.lower })
+  local view = text_topology.new({ "xAa" }, "utf-8")
+  local positions = planner:plan(
+    view,
+    domain.Position.new(1, 1),
+    "f",
+    2,
+    { ignore_case = false, smart_case = true }
+  )
+
+  same(1, #positions)
+  same(domain.Position.new(1, 3), positions[1])
+  truthy(direct_preview_planner.is_upper_ascii("A"))
+  falsy(direct_preview_planner.is_upper_ascii("a"))
+  falsy(direct_preview_planner.is_upper_ascii("AA"))
+end)
+
 for _, item in ipairs(tests) do
   local ok, failure = xpcall(item.body, debug.traceback)
   if not ok then
-- 
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