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-rw-r--r--src/testdir/test_scrollbind.vim275
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+" Test for 'scrollbind' causing an unexpected scroll of one of the windows.
+
+func Test_scrollbind()
+ " We don't want the status line to cause problems:
+ set laststatus=0
+ let totalLines = &lines * 20
+ let middle = totalLines / 2
+ new | only
+ for i in range(1, totalLines)
+ call setline(i, 'LINE ' . i)
+ endfor
+ exe string(middle)
+ normal zt
+ normal M
+ aboveleft vert new
+ for i in range(1, totalLines)
+ call setline(i, 'line ' . i)
+ endfor
+ exe string(middle)
+ normal zt
+ normal M
+ " Execute the following two commands at once to reproduce the problem.
+ setl scb | wincmd p
+ setl scb
+ wincmd w
+ let topLineLeft = line('w0')
+ wincmd p
+ let topLineRight = line('w0')
+ setl noscrollbind
+ wincmd p
+ setl noscrollbind
+ call assert_equal(0, topLineLeft - topLineRight)
+endfunc
+
+" Test for 'scrollbind'
+func Test_scrollbind_opt()
+ new | only
+ set noscrollbind
+ set scrollopt=ver,jump scrolloff=2 nowrap noequalalways splitbelow
+
+ " Insert the text used for the test
+ append
+
+
+start of window 1
+. line 01 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 01
+. line 02 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 02
+. line 03 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 03
+. line 04 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 04
+. line 05 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 05
+. line 06 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 06
+. line 07 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 07
+. line 08 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 08
+. line 09 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 09
+. line 10 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 10
+. line 11 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 11
+. line 12 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 12
+. line 13 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 13
+. line 14 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 14
+. line 15 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 15
+end of window 1
+
+
+start of window 2
+. line 01 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 01
+. line 02 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 02
+. line 03 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 03
+. line 04 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 04
+. line 05 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 05
+. line 06 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 06
+. line 07 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 07
+. line 08 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 08
+. line 09 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 09
+. line 10 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 10
+. line 11 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 11
+. line 12 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 12
+. line 13 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 13
+. line 14 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 14
+. line 15 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 15
+. line 16 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 16
+end of window 2
+
+.
+
+ " Test using two windows open to one buffer, one extra empty window
+ split
+ new
+ wincmd t
+ resize 8
+ call search('^start of window 1$')
+ normal zt
+ set scrollbind
+ wincmd j
+ resize 7
+ call search('^start of window 2$')
+ normal zt
+ set scrollbind
+
+ " -- start of tests --
+ " Test scrolling down
+ normal L5jHyy
+ wincmd b | normal pr0
+ wincmd t | normal Hyy
+ wincmd b | normal pr1
+ wincmd t | normal L6jHyy
+ wincmd b | normal pr2
+ wincmd k | normal Hyy
+ wincmd b | normal pr3
+
+ " Test scrolling up
+ wincmd t | normal H4k
+ wincmd j | normal H
+ wincmd t | normal Hyy
+ wincmd b | normal pr4
+ wincmd k | normal Hyy
+ wincmd b | normal pr5
+ wincmd k | normal 3k
+ wincmd t | normal H
+ wincmd j | normal Hyy
+ wincmd b | normal pr6
+ wincmd t | normal Hyy
+ wincmd b | normal pr7
+
+ " Test horizontal scrolling
+ set scrollopt+=hor
+ normal gg"zyyG"zpG
+ wincmd t | normal 015zly$
+ wincmd b | normal p"zpG
+ wincmd k | normal y$
+ wincmd b | normal p"zpG
+ wincmd k | normal 10jH7zhg0y$
+ wincmd b | normal p"zpG
+ wincmd t | normal Hg0y$
+ wincmd b | normal p"zpG
+ set scrollopt-=hor
+
+ wincmd b
+ call assert_equal([
+ \ '',
+ \ '0 line 05 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 05',
+ \ '1 line 05 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 05',
+ \ '2 line 11 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 11',
+ \ '3 line 11 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 11',
+ \ '4 line 06 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 06',
+ \ '5 line 06 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 06',
+ \ '6 line 02 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 02',
+ \ '7 line 02 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 02',
+ \ '56789ABCDEFGHIJKLMNOPQRSTUVWXYZ 02',
+ \ 'UTSRQPONMLKJIHGREDCBA9876543210 02',
+ \ '. line 11 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 11',
+ \ '. line 11 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 11',
+ \ ''], getline(1, '$'))
+ enew!
+
+ " ****** tests using two different buffers *****
+ wincmd t | wincmd j | close
+ wincmd t | set noscrollbind
+ /start of window 2$/,/^end of window 2$/y
+ new
+ wincmd t | wincmd j | normal 4"zpGp
+ wincmd t
+ call search('^start of window 1$')
+ normal zt
+ set scrollbind
+ wincmd j
+ call search('^start of window 2$')
+ normal zt
+ set scrollbind
+
+ " -- start of tests --
+ " Test scrolling down
+ normal L5jHyy
+ wincmd b | normal pr0
+ wincmd t | normal Hyy
+ wincmd b | normal pr1
+ wincmd t | normal L6jHyy
+ wincmd b | normal pr2
+ wincmd k | normal Hyy
+ wincmd b | normal pr3
+
+ " Test scrolling up
+ wincmd t | normal H4k
+ wincmd j | normal H
+ wincmd t | normal Hyy
+ wincmd b | normal pr4
+ wincmd k | normal Hyy
+ wincmd b | normal pr5
+ wincmd k | normal 3k
+ wincmd t | normal H
+ wincmd j | normal Hyy
+ wincmd b | normal pr6
+ wincmd t | normal Hyy
+ wincmd b | normal pr7
+
+ " Test horizontal scrolling
+ set scrollopt+=hor
+ normal gg"zyyG"zpG
+ wincmd t | normal 015zly$
+ wincmd b | normal p"zpG
+ wincmd k | normal y$
+ wincmd b | normal p"zpG
+ wincmd k | normal 10jH7zhg0y$
+ wincmd b | normal p"zpG
+ wincmd t | normal Hg0y$
+ wincmd b | normal p"zpG
+ set scrollopt-=hor
+
+ wincmd b
+ call assert_equal([
+ \ '',
+ \ '0 line 05 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 05',
+ \ '1 line 05 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 05',
+ \ '2 line 11 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 11',
+ \ '3 line 11 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 11',
+ \ '4 line 06 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 06',
+ \ '5 line 06 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 06',
+ \ '6 line 02 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 02',
+ \ '7 line 02 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 02',
+ \ '56789ABCDEFGHIJKLMNOPQRSTUVWXYZ 02',
+ \ 'UTSRQPONMLKJIHGREDCBA9876543210 02',
+ \ '. line 10 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 10',
+ \ '. line 10 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 10',
+ \ ''], getline(1, '$'))
+ enew!
+
+ " Test 'syncbind'
+ wincmd t | set noscrollbind | normal ggL
+ wincmd j | set noscrollbind | normal ggL
+ set scrollbind
+ wincmd t | set scrollbind | normal G
+ wincmd j | normal G
+ syncbind
+ normal Hk
+ wincmd t | normal H
+ wincmd j | normal Hyy
+ wincmd b | normal p
+ wincmd t | normal yy
+ wincmd b | normal p
+ wincmd t | set noscrollbind | normal ggL
+ wincmd j | set noscrollbind
+ normal ggL
+ set scrollbind
+ wincmd t | set scrollbind
+ wincmd t | normal G
+ wincmd j | normal G
+ wincmd t | syncbind | normal Hk
+ wincmd j | normal H
+ wincmd t | normal Hyy
+ wincmd b | normal p
+ wincmd t | wincmd j | normal yy
+ wincmd b | normal p
+ wincmd t | normal H3k
+ wincmd j | normal H
+ wincmd t | normal Hyy
+ wincmd b | normal p
+ wincmd t | wincmd j | normal yy
+ wincmd b | normal p
+
+ wincmd b
+ call assert_equal([
+ \ '',
+ \ '. line 16 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 16',
+ \ 'start of window 2',
+ \ 'start of window 2',
+ \ '. line 16 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 16',
+ \ '. line 15 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ 15',
+ \ '. line 12 ZYXWVUTSRQPONMLKJIHGREDCBA9876543210 12',
+ \ ], getline(1, '$'))
+ enew!
+
+ new | only!
+ set scrollbind& scrollopt& scrolloff& wrap& equalalways& splitbelow&
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab