vim-patch:8.2.3136: no test for E187 and "No swap file"

Problem:    No test for E187 and "No swap file".
Solution:   Add a test. (Dominique Pellé, closes vim/vim#8540)
fe3418abe0

src/nvim/testdir/test_cd.vim

@@ -1,4 +1,7 @@
-" Test for :cd
+" Test for :cd and chdir()
+
+source shared.vim
+source check.vim
 
 func Test_cd_large_path()
   " This used to crash with a heap write overflow.
@@ -65,3 +68,18 @@ func Test_cd_with_cpo_chdir()
   set cpo&
   bw!
 endfunc
+
+func Test_cd_from_non_existing_dir()
+  CheckNotMSWindows
+
+  let saveddir = getcwd()
+  call mkdir('Xdeleted_dir')
+  cd Xdeleted_dir
+  call delete(saveddir .. '/Xdeleted_dir', 'd')
+
+  " Expect E187 as the current directory was deleted.
+  call assert_fails('pwd', 'E187:')
+  call assert_equal('', getcwd())
+  cd -
+  call assert_equal(saveddir, getcwd())
+endfunc

src/nvim/testdir/test_swap.vim

@@ -376,4 +376,8 @@ func Test_swap_symlink()
   call delete('Xswapdir', 'rf')
 endfunc
 
+func Test_no_swap_file()
+  call assert_equal("\nNo swap file", execute('swapname'))
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab