test: :restart works on Windows

runtime/doc/gui.txt

@@ -81,7 +81,6 @@ Restart Nvim
                 Note: If the current UI hasn't implemented the "restart" UI
                 event, this command is equivalent to `:qall`.
                 Note: Only works if the UI and server are on the same system.
-                Note: Not supported on Windows yet.
 
 :restart!
                 Force restarts the Nvim server, abandoning unsaved buffers.

test/functional/terminal/tui_spec.lua

@@ -179,10 +179,6 @@ describe('TUI :detach', function()
   end)
 end)
 
-if t.skip(is_os('win')) then
-  return
-end
-
 describe('TUI :restart', function()
   it('resets buffer to blank', function()
     clear()
@@ -206,6 +202,19 @@ describe('TUI :restart', function()
       'echo getpid()',
     })
 
+    --- FIXME: On Windows spaces at the end of a screen line may have wrong attrs.
+    --- Remove this function when that's fixed.
+    ---
+    --- @param s string
+    local function screen_expect(s)
+      if is_os('win') then
+        s = s:gsub(' +%}%|\n', '{MATCH: *}}{MATCH: *}|\n')
+        s = s:gsub(' *%} +%|\n', '{MATCH: *}}{MATCH: *}|\n')
+        s = s:gsub('%}%^ +%|\n', '{MATCH:[ ^]*}}{MATCH:[ ^]*}|\n')
+      end
+      screen:expect(s)
+    end
+
     local s0 = [[
       ^                                                  |
       {4:~                                                 }|*3
@@ -213,11 +222,20 @@ describe('TUI :restart', function()
       {MATCH:%d+ +}|
       {3:-- TERMINAL --}                                    |
     ]]
-    screen:expect(s0)
+    screen_expect(s0)
-    local server_session = n.connect(server_pipe)
+
-    local _, server_pid = server_session:request('nvim_call_function', 'getpid', {})
+    local server_session --[[@type test.Session]]
+    local server_pid --[[@type any]]
+    -- FIXME: On Windows connect() hangs.
+    if not is_os('win') then
+      server_session = n.connect(server_pipe)
+      _, server_pid = server_session:request('nvim_call_function', 'getpid', {})
+    end
 
     local function restart_pid_check()
+      if is_os('win') then
+        return
+      end
       server_session:close()
       server_session = n.connect(server_pipe)
       local _, new_pid = server_session:request('nvim_call_function', 'getpid', {})
@@ -233,11 +251,11 @@ describe('TUI :restart', function()
 
     -- Check ":restart" on an unmodified buffer.
     tt.feed_data(':restart\013')
-    screen:expect(s0)
+    screen_expect(s0)
     restart_pid_check()
 
     tt.feed_data('ithis will be removed\027')
-    screen:expect([[
+    screen_expect([[
       this will be remove^d                              |
       {4:~                                                 }|*3
       {5:[No Name] [+]                                     }|
@@ -247,7 +265,7 @@ describe('TUI :restart', function()
 
     -- Check ":restart" on a modified buffer.
     tt.feed_data(':restart\013')
-    screen:expect([[
+    screen_expect([[
       this will be removed                              |
       {5:                                                  }|
       {8:E37: No write since last change}                   |
@@ -259,11 +277,11 @@ describe('TUI :restart', function()
 
     -- Check ":restart!".
     tt.feed_data(':restart!\013')
-    screen:expect(s0)
+    screen_expect(s0)
     restart_pid_check()
 
     tt.feed_data(':echo\n')
-    screen:expect([[
+    screen_expect([[
       ^                                                  |
       {4:~                                                 }|*3
       {5:[No Name]                                         }|
@@ -273,11 +291,11 @@ describe('TUI :restart', function()
 
     -- No --listen conflict when server exit is delayed.
     feed_data(':lua vim.schedule(function() vim.wait(100) end); vim.cmd.restart()\n')
-    screen:expect(s0)
+    screen_expect(s0)
     restart_pid_check()
 
     screen:try_resize(60, 6)
-    screen:expect([[
+    screen_expect([[
       ^                                                            |
       {4:~                                                           }|*2
       {5:[No Name]                                                   }|
@@ -287,7 +305,7 @@ describe('TUI :restart', function()
 
     --- Check that ":restart" uses the updated size after terminal resize.
     tt.feed_data(':restart\013')
-    screen:expect([[
+    screen_expect([[
       ^                                                            |
       {4:~                                                           }|*2
       {5:[No Name]                                                   }|
@@ -298,6 +316,10 @@ describe('TUI :restart', function()
   end)
 end)
 
+if t.skip(is_os('win')) then
+  return
+end
+
 describe('TUI', function()
   local screen --[[@type test.functional.ui.screen]]
   local child_session --[[@type test.Session]]