1 files changed, 56 insertions, 0 deletions
diff --git a/tests/run.lua b/tests/run.lua
index 5ca4f34..871d977 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -361,6 +361,30 @@ test("ActionOutcome and DotPayload retain resolved result data", function()
   same("problem", domain.ActionOutcome.error(destination, "problem").diagnostic)
 end)
 
+test("Host adapter reads encoding and uses Nvim case conversion", function()
+  local lowered = {}
+  local runtime = {
+    api = {
+      nvim_get_option_value = function(name, options)
+        same("encoding", name)
+        same("global", options.scope)
+        return "utf-8"
+      end,
+    },
+    fn = {
+      tolower = function(value)
+        lowered[#lowered + 1] = value
+        return string.lower(value)
+      end,
+    },
+  }
+  local adapter = host_adapter.new({ runtime = runtime })
+
+  same("utf-8", adapter:read_encoding())
+  same("abc", adapter:lowercase("AbC"))
+  list_same({ "AbC" }, lowered)
+end)
+
 test("Host adapter restores exact cursor presentation values", function()
   local options = {
     guicursor = "n:block,i:ver37-blinkon123",
@@ -7382,6 +7406,38 @@ test("Eager cleanup preserves history and finalizer registrations", function()
   same(nil, state.highlight_timer)
 end)
 
+test("Core composition injects host case conversion into matching", function()
+  fresh_sequence_state()
+  local conversions = {}
+  local host = MemoryHost.new({
+    buffer_lines = { "xA" },
+    cursor = { line = 1, byte_column = 1 },
+    lowercase = function(value)
+      conversions[#conversions + 1] = value
+      if value == "a" or value == "A" then
+        return "folded-a"
+      end
+      return value
+    end,
+    input_packets = { { kind = "text", text = "a" } },
+    configuration = {
+      ignore_case = true,
+      mark_cursor = false,
+      mark_char = false,
+    },
+    emit_movement_events = false,
+  })
+
+  local outcome = composition_root.new({ host = host })
+    :invoke_descriptor("f")
+
+  same(domain.ActionKind.MOVEMENT, outcome.kind)
+  same(domain.Position.new(1, 2), outcome.position)
+  truthy(#conversions >= 2)
+  same("a", conversions[1])
+  same("A", conversions[#conversions])
+end)
+
 test("Core activation owns the plugin-global sequence state", function()
   local state = fresh_sequence_state()
   local host = MemoryHost.new()