test: add some tests for SafeState autocommand

test/functional/autocmd/safestate_spec.lua

@@ -0,0 +1,57 @@
+local helpers = require('test.functional.helpers')(after_each)
+local clear = helpers.clear
+local eq = helpers.eq
+local exec = helpers.exec
+local feed = helpers.feed
+local meths = helpers.meths
+
+before_each(clear)
+
+describe('SafeState autocommand', function()
+  local function create_autocmd()
+    exec([[
+      let g:safe = 0
+      autocmd SafeState * ++once let g:safe += 1
+    ]])
+  end
+
+  it('with pending operator', function()
+    feed('d')
+    create_autocmd()
+    eq(0, meths.get_var('safe'))
+    feed('d')
+    eq(1, meths.get_var('safe'))
+  end)
+
+  it('with specified register', function()
+    feed('"r')
+    create_autocmd()
+    eq(0, meths.get_var('safe'))
+    feed('x')
+    eq(1, meths.get_var('safe'))
+  end)
+
+  it('with i_CTRL-O', function()
+    feed('i<C-O>')
+    create_autocmd()
+    eq(0, meths.get_var('safe'))
+    feed('x')
+    eq(1, meths.get_var('safe'))
+  end)
+
+  it('with Insert mode completion', function()
+    feed('i<C-X><C-V>')
+    create_autocmd()
+    eq(0, meths.get_var('safe'))
+    feed('<C-X><C-Z>')
+    eq(1, meths.get_var('safe'))
+  end)
+
+  it('with Cmdline completion', function()
+    feed(':<Tab>')
+    create_autocmd()
+    eq(0, meths.get_var('safe'))
+    feed('<C-E>')
+    eq(1, meths.get_var('safe'))
+  end)
+end)

test/functional/vimscript/state_spec.lua

@@ -17,7 +17,6 @@ describe('state() function', function()
       function _G.Get_state_mode()
         _G.res = { vim.fn.state(), vim.api.nvim_get_mode().mode:sub(1, 1) }
       end
-
       function _G.Run_timer()
         local timer = vim.uv.new_timer()
         timer:start(0, 0, function()