Preserve cursor presentation state

1 files changed, 54 insertions, 0 deletions

diff --git a/tests/run.lua b/tests/run.lua
index e0c9b0c..5ca4f34 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -361,6 +361,60 @@ test("ActionOutcome and DotPayload retain resolved result data", function()
   same("problem", domain.ActionOutcome.error(destination, "problem").diagnostic)
 end)
 
+test("Host adapter restores exact cursor presentation values", function()
+  local options = {
+    guicursor = "n:block,i:ver37-blinkon123",
+    t_ve = "terminal-visible-sequence",
+  }
+  local writes = {}
+  local runtime = {
+    api = {
+      nvim_get_option_value = function(name, request)
+        same("global", request.scope)
+        return options[name]
+      end,
+      nvim_set_option_value = function(name, value, request)
+        same("global", request.scope)
+        options[name] = value
+        writes[#writes + 1] = { name = name, value = value }
+      end,
+      nvim_cmd = function(command)
+        same("let", command.cmd)
+        same("&t_ve", command.args[1])
+        same("=", command.args[2])
+        options.t_ve = command.args[3]
+        writes[#writes + 1] = { name = "t_ve", value = command.args[3] }
+      end,
+    },
+    fn = {
+      exists = function(name)
+        same("+t_ve", name)
+        return 1
+      end,
+      eval = function(name)
+        same("&t_ve", name)
+        return options.t_ve
+      end,
+      string = function(value)
+        return value
+      end,
+    },
+  }
+  local adapter = host_adapter.new({ runtime = runtime })
+  truthy(adapter:supports_cursor_presentation())
+
+  local lease = adapter:suppress_cursor_presentation()
+  truthy(lease ~= nil)
+  same("a:ver1", options.guicursor)
+  same("", options.t_ve)
+
+  truthy(adapter:restore_cursor_presentation(lease))
+  same("n:block,i:ver37-blinkon123", options.guicursor)
+  same("terminal-visible-sequence", options.t_ve)
+  falsy(adapter:restore_cursor_presentation(lease))
+  same(4, #writes)
+end)
+
 test("Host adapter owns Nvim timers and event registrations", function()
   local timer_callbacks = {}
   local stopped_timers = {}