patch 8.1.1291: not easy to change directory and restore
Problem: Not easy to change directory and restore.
Solution: Add the chdir() function. (Yegappan Lakshmanan, closes #4358)
diff --git a/src/testdir/test_cd.vim b/src/testdir/test_cd.vim
index c63f006..3185954 100644
--- a/src/testdir/test_cd.vim
+++ b/src/testdir/test_cd.vim
@@ -1,4 +1,4 @@
-" Test for :cd
+" Test for :cd and chdir()
func Test_cd_large_path()
" This used to crash with a heap write overflow.
@@ -65,3 +65,44 @@
set cpo&
bw!
endfunc
+
+" Test for chdir()
+func Test_chdir_func()
+ let topdir = getcwd()
+ call mkdir('Xdir/y/z', 'p')
+
+ " Create a few tabpages and windows with different directories
+ new
+ cd Xdir
+ tabnew
+ tcd y
+ below new
+ below new
+ lcd z
+
+ tabfirst
+ call chdir('..')
+ call assert_equal('y', fnamemodify(getcwd(1, 2), ':t'))
+ call assert_equal('z', fnamemodify(getcwd(3, 2), ':t'))
+ tabnext | wincmd t
+ call chdir('..')
+ call assert_equal('Xdir', fnamemodify(getcwd(1, 2), ':t'))
+ call assert_equal('Xdir', fnamemodify(getcwd(2, 2), ':t'))
+ call assert_equal('z', fnamemodify(getcwd(3, 2), ':t'))
+ call assert_equal('testdir', fnamemodify(getcwd(1, 1), ':t'))
+ 3wincmd w
+ call chdir('..')
+ call assert_equal('Xdir', fnamemodify(getcwd(1, 2), ':t'))
+ call assert_equal('Xdir', fnamemodify(getcwd(2, 2), ':t'))
+ call assert_equal('y', fnamemodify(getcwd(3, 2), ':t'))
+ call assert_equal('testdir', fnamemodify(getcwd(1, 1), ':t'))
+
+ " Error case
+ call assert_fails("call chdir('dir-abcd')", 'E472:')
+ silent! let d = chdir("dir_abcd")
+ call assert_equal("", d)
+
+ only | tabonly
+ exe 'cd ' . topdir
+ call delete('Xdir', 'rf')
+endfunc