test: Add terminal tests

- Modify tty-test to allow easier control over the terminal
- Add a new directory with various terminal tests/specifications
- Remove a pending job/pty test.
- Flush stdout in Screen:snapshot_util() (avoid waiting for the test to finish)
- Replace libuv sigwinch watcher by a sigaction handler. libuv randomly fails to
  deliver signals on OSX. Might be related to the problem fixed by
  @bbcddc55ee1e5605657592644be0102ed3a5f104 (under the hoods, libuv uses a pipe
  to deliver signals to the main thread, which might be blocking in some
  situations)

1 files changed, 6 insertions, 2 deletions

diff --git a/test/functional/ui/screen.lua b/test/functional/ui/screen.lua
index c60944bbb0..174538df6e 100644
--- a/test/functional/ui/screen.lua
+++ b/test/functional/ui/screen.lua
@@ -190,8 +190,11 @@ function Screen:set_default_attr_ignore(attr_ignore)
   self._default_attr_ignore = attr_ignore
 end
 
-function Screen:attach()
-  request('ui_attach', self._width, self._height, true)
+function Screen:attach(rgb)
+  if rgb == nil then
+    rgb = true
+  end
+  request('ui_attach', self._width, self._height, rgb)
 end
 
 function Screen:detach()
@@ -500,6 +503,7 @@ function Screen:snapshot_util(attrs, ignore)
   else
     print( "]], "..attrstr..")\n")
   end
+  io.stdout:flush()
 end
 
 function pprint_attrs(attrs)