Count folded preview classes

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/run.lua b/tests/run.lua
index 7ec0baf..3c2a077 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -4649,6 +4649,33 @@ test("Default direct previews count each exact character", function()
   list_same({ 15 }, columns(planner:plan(view, origin, "f", 3)))
 end)
 
+test("Ignore-case previews count editor-folded character classes", function()
+  local folded = {}
+  local planner = direct_preview_planner.new({
+    lowercase = function(character)
+      folded[#folded + 1] = character
+      return string.lower(character)
+    end,
+  })
+  local view = text_topology.new({ "xAaBbC" }, "utf-8")
+  local origin = domain.Position.new(1, 1)
+
+  local positions = planner:plan(view, origin, "f", 2, {
+    ignore_case = true,
+    smart_case = false,
+  })
+  same(2, #positions)
+  same(domain.Position.new(1, 3), positions[1])
+  same(domain.Position.new(1, 5), positions[2])
+  list_same({ "A", "a", "B", "b", "C" }, folded)
+
+  local exact = planner:plan(view, origin, "f", 2, {
+    ignore_case = false,
+    smart_case = false,
+  })
+  same(0, #exact)
+end)
+
 for _, item in ipairs(tests) do
   local ok, failure = xpcall(item.body, debug.traceback)
   if not ok then