Add a tree-sitter test

test/vader/minvimrc

@@ -12,6 +12,19 @@ let &rtp  = s:path.'/test/rtp,' . &rtp
 " load other plugins, if necessary
 " let &rtp = '~/path/to/other/plugin,' . &rtp
 
+if has('nvim-0.5.0')
+  let &rtp = s:path.'/test/vader/plugged/nvim-treesitter,' . &rtp
+  let &rtp .= ','.s:path.'/test/vader/plugged/nvim-treesitter/after'
+
+  lua <<EOF
+  require'nvim-treesitter.configs'.setup {
+    matchup = {
+      enable = true
+    }
+  }
+EOF
+endif
+
 if empty(globpath(&rtp, 'plugin/vader.vim'))
   echoerr 'vader not found'
   exit!

test/vader/ts_py_motion.vader

@@ -0,0 +1,46 @@
+Execute (Helper):
+  function! TSActive()
+    return exists(':TSInstall')
+  endfunction
+
+  if TSActive()
+    Log 'nvim-treesitter active'
+  else
+    Log 'nvim-treesitter not active'
+  endif
+
+Given python (A python script):
+  def F(x):
+    if x == 1:
+      return 1
+    elif x == 2:
+      pass
+    else:
+      return 3
+    return 2
+
+Execute (Logs):
+  Log b:matchup_active_engines
+
+Before (Cursor):
+  normal! 2gg^
+
+Do (Move %):
+  %
+Then (Verify line):
+  Assert line('.') == (TSActive() ? 4 : 2)
+
+Do (Move % twice):
+  %%
+Then (Verify line):
+  Assert line('.') == (TSActive() ? 6 : 2)
+
+Do (Move % 3 times):
+  %%%
+Then (Verify line):
+  Assert line('.') == (TSActive() ? 2 : 2)
+
+Do (Move % 4 times):
+  %%%%
+Then (Verify line):
+  Assert line('.') == (TSActive() ? 4 : 2)