patch 8.1.0251: using full path is not supported for 'backupdir'
Problem: Using a full path is supported for 'directory' but not for
'backupdir'. (Mikolaj Machowski)
Solution: Support 'backupdir' as well. (Christian Brabandt, closes #179)
diff --git a/src/testdir/test_backup.vim b/src/testdir/test_backup.vim
new file mode 100644
index 0000000..3187b58
--- /dev/null
+++ b/src/testdir/test_backup.vim
@@ -0,0 +1,58 @@
+" Tests for the backup function
+
+func Test_backup()
+ set backup backupdir=.
+ new
+ call setline(1, ['line1', 'line2'])
+ :f Xbackup.txt
+ :w! Xbackup.txt
+ " backup file is only created after
+ " writing a second time (before overwriting)
+ :w! Xbackup.txt
+ let l = readfile('Xbackup.txt~')
+ call assert_equal(['line1', 'line2'], l)
+ bw!
+ set backup&vim backupdir&vim
+ call delete('Xbackup.txt')
+ call delete('Xbackup.txt~')
+endfunc
+
+func Test_backup2()
+ set backup backupdir=.//
+ new
+ call setline(1, ['line1', 'line2', 'line3'])
+ :f Xbackup.txt
+ :w! Xbackup.txt
+ " backup file is only created after
+ " writing a second time (before overwriting)
+ :w! Xbackup.txt
+ sp *Xbackup.txt~
+ call assert_equal(['line1', 'line2', 'line3'], getline(1,'$'))
+ let f=expand('%')
+ call assert_match('src%testdir%Xbackup.txt\~', f)
+ bw!
+ bw!
+ call delete('Xbackup.txt')
+ call delete(f)
+ set backup&vim backupdir&vim
+endfunc
+
+func Test_backup2_backupcopy()
+ set backup backupdir=.// backupcopy=yes
+ new
+ call setline(1, ['line1', 'line2', 'line3'])
+ :f Xbackup.txt
+ :w! Xbackup.txt
+ " backup file is only created after
+ " writing a second time (before overwriting)
+ :w! Xbackup.txt
+ sp *Xbackup.txt~
+ call assert_equal(['line1', 'line2', 'line3'], getline(1,'$'))
+ let f=expand('%')
+ call assert_match('src%testdir%Xbackup.txt\~', f)
+ bw!
+ bw!
+ call delete('Xbackup.txt')
+ call delete(f)
+ set backup&vim backupdir&vim backupcopy&vim
+endfunc