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+" Tests for diff mode
+
+func Test_diff_fold_sync()
+ enew!
+ let g:update_count = 0
+ au DiffUpdated * let g:update_count += 1
+
+ let l = range(50)
+ call setline(1, l)
+ diffthis
+ let winone = win_getid()
+ new
+ let l[25] = 'diff'
+ call setline(1, l)
+ diffthis
+ let wintwo = win_getid()
+ " line 15 is inside the closed fold
+ call assert_equal(19, foldclosedend(10))
+ call win_gotoid(winone)
+ call assert_equal(19, foldclosedend(10))
+ " open the fold
+ normal zv
+ call assert_equal(-1, foldclosedend(10))
+ " fold in other window must have opened too
+ call win_gotoid(wintwo)
+ call assert_equal(-1, foldclosedend(10))
+
+ " cursor position is in sync
+ normal 23G
+ call win_gotoid(winone)
+ call assert_equal(23, getcurpos()[1])
+
+ call assert_equal(1, g:update_count)
+ au! DiffUpdated
+
+ windo diffoff
+ close!
+ set nomodified
+endfunc
+
+func Test_vert_split()
+ set diffopt=filler
+ call Common_vert_split()
+ set diffopt&
+endfunc
+
+func Test_vert_split_internal()
+ set diffopt=internal,filler
+ call Common_vert_split()
+ set diffopt&
+endfunc
+
+func Common_vert_split()
+ " Disable the title to avoid xterm keeping the wrong one.
+ set notitle noicon
+ new
+ let l = ['1 aa', '2 bb', '3 cc', '4 dd', '5 ee']
+ call setline(1, l)
+ w! Xtest
+ normal dd
+ $
+ put
+ normal kkrXoxxx
+ w! Xtest2
+ file Nop
+ normal ggoyyyjjjozzzz
+ set foldmethod=marker foldcolumn=4
+ call assert_equal(0, &diff)
+ call assert_equal('marker', &foldmethod)
+ call assert_equal(4, &foldcolumn)
+ call assert_equal(0, &scrollbind)
+ call assert_equal(0, &cursorbind)
+ call assert_equal(1, &wrap)
+
+ vert diffsplit Xtest
+ vert diffsplit Xtest2
+ call assert_equal(1, &diff)
+ call assert_equal('diff', &foldmethod)
+ call assert_equal(2, &foldcolumn)
+ call assert_equal(1, &scrollbind)
+ call assert_equal(1, &cursorbind)
+ call assert_equal(0, &wrap)
+
+ let diff_fdm = &fdm
+ let diff_fdc = &fdc
+ " repeat entering diff mode here to see if this saves the wrong settings
+ diffthis
+ " jump to second window for a moment to have filler line appear at start of
+ " first window
+ wincmd w
+ normal gg
+ wincmd p
+ normal gg
+ call assert_equal(2, winline())
+ normal j
+ call assert_equal(4, winline())
+ normal j
+ call assert_equal(5, winline())
+ normal j
+ call assert_equal(6, winline())
+ normal j
+ call assert_equal(8, winline())
+ normal j
+ call assert_equal(9, winline())
+
+ wincmd w
+ normal gg
+ call assert_equal(1, winline())
+ normal j
+ call assert_equal(2, winline())
+ normal j
+ call assert_equal(4, winline())
+ normal j
+ call assert_equal(5, winline())
+ normal j
+ call assert_equal(8, winline())
+
+ wincmd w
+ normal gg
+ call assert_equal(2, winline())
+ normal j
+ call assert_equal(3, winline())
+ normal j
+ call assert_equal(4, winline())
+ normal j
+ call assert_equal(5, winline())
+ normal j
+ call assert_equal(6, winline())
+ normal j
+ call assert_equal(7, winline())
+ normal j
+ call assert_equal(8, winline())
+
+ " Test diffoff
+ diffoff!
+ 1wincmd 2
+ let &diff = 1
+ let &fdm = diff_fdm
+ let &fdc = diff_fdc
+ 4wincmd w
+ diffoff!
+ 1wincmd w
+ call assert_equal(0, &diff)
+ call assert_equal('marker', &foldmethod)
+ call assert_equal(4, &foldcolumn)
+ call assert_equal(0, &scrollbind)
+ call assert_equal(0, &cursorbind)
+ call assert_equal(1, &wrap)
+
+ wincmd w
+ call assert_equal(0, &diff)
+ call assert_equal('marker', &foldmethod)
+ call assert_equal(4, &foldcolumn)
+ call assert_equal(0, &scrollbind)
+ call assert_equal(0, &cursorbind)
+ call assert_equal(1, &wrap)
+
+ wincmd w
+ call assert_equal(0, &diff)
+ call assert_equal('marker', &foldmethod)
+ call assert_equal(4, &foldcolumn)
+ call assert_equal(0, &scrollbind)
+ call assert_equal(0, &cursorbind)
+ call assert_equal(1, &wrap)
+
+ call delete('Xtest')
+ call delete('Xtest2')
+ windo bw!
+endfunc
+
+func Test_filler_lines()
+ " Test that diffing shows correct filler lines
+ enew!
+ put =range(4,10)
+ 1d _
+ vnew
+ put =range(1,10)
+ 1d _
+ windo diffthis
+ wincmd h
+ call assert_equal(1, line('w0'))
+ unlet! diff_fdm diff_fdc
+ windo diffoff
+ bwipe!
+ enew!
+endfunc
+
+func Test_diffget_diffput()
+ enew!
+ let l = range(50)
+ call setline(1, l)
+ call assert_fails('diffget', 'E99:')
+ diffthis
+ call assert_fails('diffget', 'E100:')
+ new
+ let l[10] = 'one'
+ let l[20] = 'two'
+ let l[30] = 'three'
+ let l[40] = 'four'
+ call setline(1, l)
+ diffthis
+ call assert_equal('one', getline(11))
+ 11diffget
+ call assert_equal('10', getline(11))
+ 21diffput
+ wincmd w
+ call assert_equal('two', getline(21))
+ normal 31Gdo
+ call assert_equal('three', getline(31))
+ call assert_equal('40', getline(41))
+ normal 41Gdp
+ wincmd w
+ call assert_equal('40', getline(41))
+ new
+ diffthis
+ call assert_fails('diffget', 'E101:')
+
+ windo diffoff
+ %bwipe!
+endfunc
+
+" Test putting two changes from one buffer to another
+func Test_diffput_two()
+ new a
+ let win_a = win_getid()
+ call setline(1, range(1, 10))
+ diffthis
+ new b
+ let win_b = win_getid()
+ call setline(1, range(1, 10))
+ 8del
+ 5del
+ diffthis
+ call win_gotoid(win_a)
+ %diffput
+ call win_gotoid(win_b)
+ call assert_equal(map(range(1, 10), 'string(v:val)'), getline(1, '$'))
+ bwipe! a
+ bwipe! b
+endfunc
+
+func Test_dp_do_buffer()
+ e! one
+ let bn1=bufnr('%')
+ let l = range(60)
+ call setline(1, l)
+ diffthis
+
+ new two
+ let l[10] = 'one'
+ let l[20] = 'two'
+ let l[30] = 'three'
+ let l[40] = 'four'
+ let l[50] = 'five'
+ call setline(1, l)
+ diffthis
+
+ " dp and do with invalid buffer number.
+ 11
+ call assert_fails('norm 99999dp', 'E102:')
+ call assert_fails('norm 99999do', 'E102:')
+ call assert_fails('diffput non_existing_buffer', 'E94:')
+ call assert_fails('diffget non_existing_buffer', 'E94:')
+
+ " dp and do with valid buffer number.
+ call assert_equal('one', getline('.'))
+ exe 'norm ' . bn1 . 'do'
+ call assert_equal('10', getline('.'))
+ 21
+ call assert_equal('two', getline('.'))
+ diffget one
+ call assert_equal('20', getline('.'))
+
+ 31
+ exe 'norm ' . bn1 . 'dp'
+ 41
+ diffput one
+ wincmd w
+ 31
+ call assert_equal('three', getline('.'))
+ 41
+ call assert_equal('four', getline('.'))
+
+ " dp and do with buffer number which is not in diff mode.
+ new not_in_diff_mode
+ let bn3=bufnr('%')
+ wincmd w
+ 51
+ call assert_fails('exe "norm" . bn3 . "dp"', 'E103:')
+ call assert_fails('exe "norm" . bn3 . "do"', 'E103:')
+ call assert_fails('diffput not_in_diff_mode', 'E94:')
+ call assert_fails('diffget not_in_diff_mode', 'E94:')
+
+ windo diffoff
+ %bwipe!
+endfunc
+
+func Test_do_lastline()
+ e! one
+ call setline(1, ['1','2','3','4','5','6'])
+ diffthis
+
+ new two
+ call setline(1, ['2','4','5'])
+ diffthis
+
+ 1
+ norm dp]c
+ norm dp]c
+ wincmd w
+ call assert_equal(4, line('$'))
+ norm G
+ norm do
+ call assert_equal(3, line('$'))
+
+ windo diffoff
+ %bwipe!
+endfunc
+
+func Test_diffoff()
+ enew!
+ call setline(1, ['Two', 'Three'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+ botright vert new
+ call setline(1, ['One', '', 'Two', 'Three'])
+ diffthis
+ redraw
+ call assert_notequal(normattr, screenattr(1, 1))
+ diffoff!
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ bwipe!
+ bwipe!
+endfunc
+
+func Common_icase_test()
+ edit one
+ call setline(1, ['One', 'Two', 'Three', 'Four', 'Fi#ve'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+
+ botright vert new two
+ call setline(1, ['one', 'TWO', 'Three ', 'Four', 'fI=VE'])
+ diffthis
+
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ call assert_equal(normattr, screenattr(2, 1))
+ call assert_notequal(normattr, screenattr(3, 1))
+ call assert_equal(normattr, screenattr(4, 1))
+
+ let dtextattr = screenattr(5, 3)
+ call assert_notequal(dtextattr, screenattr(5, 1))
+ call assert_notequal(dtextattr, screenattr(5, 5))
+
+ diffoff!
+ %bwipe!
+endfunc
+
+func Test_diffopt_icase()
+ set diffopt=icase,foldcolumn:0
+ call Common_icase_test()
+ set diffopt&
+endfunc
+
+func Test_diffopt_icase_internal()
+ set diffopt=icase,foldcolumn:0,internal
+ call Common_icase_test()
+ set diffopt&
+endfunc
+
+func Common_iwhite_test()
+ edit one
+ " Difference in trailing spaces and amount of spaces should be ignored,
+ " but not other space differences.
+ call setline(1, ["One \t", 'Two', 'Three', 'one two', 'one two', 'Four'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+
+ botright vert new two
+ call setline(1, ["One\t ", "Two\t ", 'Three', 'one two', 'onetwo', ' Four'])
+ diffthis
+
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ call assert_equal(normattr, screenattr(2, 1))
+ call assert_equal(normattr, screenattr(3, 1))
+ call assert_equal(normattr, screenattr(4, 1))
+ call assert_notequal(normattr, screenattr(5, 1))
+ call assert_notequal(normattr, screenattr(6, 1))
+
+ diffoff!
+ %bwipe!
+endfunc
+
+func Test_diffopt_iwhite()
+ set diffopt=iwhite,foldcolumn:0
+ call Common_iwhite_test()
+ set diffopt&
+endfunc
+
+func Test_diffopt_iwhite_internal()
+ set diffopt=internal,iwhite,foldcolumn:0
+ call Common_iwhite_test()
+ set diffopt&
+endfunc
+
+func Test_diffopt_context()
+ enew!
+ call setline(1, ['1', '2', '3', '4', '5', '6', '7'])
+ diffthis
+ new
+ call setline(1, ['1', '2', '3', '4', '5x', '6', '7'])
+ diffthis
+
+ set diffopt=context:2
+ call assert_equal('+-- 2 lines: 1', foldtextresult(1))
+ set diffopt=internal,context:2
+ call assert_equal('+-- 2 lines: 1', foldtextresult(1))
+
+ set diffopt=context:1
+ call assert_equal('+-- 3 lines: 1', foldtextresult(1))
+ set diffopt=internal,context:1
+ call assert_equal('+-- 3 lines: 1', foldtextresult(1))
+
+ diffoff!
+ %bwipe!
+ set diffopt&
+endfunc
+
+func Test_diffopt_horizontal()
+ set diffopt=internal,horizontal
+ diffsplit
+
+ call assert_equal(&columns, winwidth(1))
+ call assert_equal(&columns, winwidth(2))
+ call assert_equal(&lines, winheight(1) + winheight(2) + 3)
+ call assert_inrange(0, 1, winheight(1) - winheight(2))
+
+ set diffopt&
+ diffoff!
+ %bwipe
+endfunc
+
+func Test_diffopt_vertical()
+ set diffopt=internal,vertical
+ diffsplit
+
+ call assert_equal(&lines - 2, winheight(1))
+ call assert_equal(&lines - 2, winheight(2))
+ call assert_equal(&columns, winwidth(1) + winwidth(2) + 1)
+ call assert_inrange(0, 1, winwidth(1) - winwidth(2))
+
+ set diffopt&
+ diffoff!
+ %bwipe
+endfunc
+
+func Test_diffopt_hiddenoff()
+ set diffopt=internal,filler,foldcolumn:0,hiddenoff
+ e! one
+ call setline(1, ['Two', 'Three'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+ botright vert new two
+ call setline(1, ['One', 'Four'])
+ diffthis
+ redraw
+ call assert_notequal(normattr, screenattr(1, 1))
+ set hidden
+ close
+ redraw
+ " should not diffing with hidden buffer two while 'hiddenoff' is enabled
+ call assert_equal(normattr, screenattr(1, 1))
+
+ bwipe!
+ bwipe!
+ set hidden& diffopt&
+endfunc
+
+func Test_diffoff_hidden()
+ set diffopt=internal,filler,foldcolumn:0
+ e! one
+ call setline(1, ['Two', 'Three'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+ botright vert new two
+ call setline(1, ['One', 'Four'])
+ diffthis
+ redraw
+ call assert_notequal(normattr, screenattr(1, 1))
+ set hidden
+ close
+ redraw
+ " diffing with hidden buffer two
+ call assert_notequal(normattr, screenattr(1, 1))
+ diffoff
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ diffthis
+ redraw
+ " still diffing with hidden buffer two
+ call assert_notequal(normattr, screenattr(1, 1))
+ diffoff!
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ diffthis
+ redraw
+ " no longer diffing with hidden buffer two
+ call assert_equal(normattr, screenattr(1, 1))
+
+ bwipe!
+ bwipe!
+ set hidden& diffopt&
+endfunc
+
+func Test_setting_cursor()
+ new Xtest1
+ put =range(1,90)
+ wq
+ new Xtest2
+ put =range(1,100)
+ wq
+
+ tabe Xtest2
+ $
+ diffsp Xtest1
+ tabclose
+
+ call delete('Xtest1')
+ call delete('Xtest2')
+endfunc
+
+func Test_diff_move_to()
+ new
+ call setline(1, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
+ diffthis
+ vnew
+ call setline(1, [1, '2x', 3, 4, 4, 5, '6x', 7, '8x', 9, '10x'])
+ diffthis
+ norm ]c
+ call assert_equal(2, line('.'))
+ norm 3]c
+ call assert_equal(9, line('.'))
+ norm 10]c
+ call assert_equal(11, line('.'))
+ norm [c
+ call assert_equal(9, line('.'))
+ norm 2[c
+ call assert_equal(5, line('.'))
+ norm 10[c
+ call assert_equal(2, line('.'))
+ %bwipe!
+endfunc
+
+func Test_diffexpr()
+ if !executable('diff')
+ return
+ endif
+
+ func DiffExpr()
+ " Prepend some text to check diff type detection
+ call writefile(['warning', ' message'], v:fname_out)
+ silent exe '!diff ' . v:fname_in . ' ' . v:fname_new . '>>' . v:fname_out
+ endfunc
+ set diffexpr=DiffExpr()
+ set diffopt=foldcolumn:0
+
+ enew!
+ call setline(1, ['one', 'two', 'three'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+
+ botright vert new
+ call setline(1, ['one', 'two', 'three.'])
+ diffthis
+
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ call assert_equal(normattr, screenattr(2, 1))
+ call assert_notequal(normattr, screenattr(3, 1))
+
+ diffoff!
+ %bwipe!
+ set diffexpr& diffopt&
+endfunc
+
+func Test_diffpatch()
+ " The patch program on MS-Windows may fail or hang.
+ if !executable('patch') || !has('unix')
+ return
+ endif
+ new
+ insert
+***************
+*** 1,3 ****
+ 1
+! 2
+ 3
+--- 1,4 ----
+ 1
+! 2x
+ 3
++ 4
+.
+ saveas! Xpatch
+ bwipe!
+ new
+ call assert_fails('diffpatch Xpatch', 'E816:')
+
+ for name in ['Xpatch', 'Xpatch$HOME', 'Xpa''tch']
+ call setline(1, ['1', '2', '3'])
+ if name != 'Xpatch'
+ call rename('Xpatch', name)
+ endif
+ exe 'diffpatch ' . escape(name, '$')
+ call assert_equal(['1', '2x', '3', '4'], getline(1, '$'))
+ if name != 'Xpatch'
+ call rename(name, 'Xpatch')
+ endif
+ bwipe!
+ endfor
+
+ call delete('Xpatch')
+ bwipe!
+endfunc
+
+func Test_diff_too_many_buffers()
+ for i in range(1, 8)
+ exe "new Xtest" . i
+ diffthis
+ endfor
+ new Xtest9
+ call assert_fails('diffthis', 'E96:')
+ %bwipe!
+endfunc
+
+func Test_diff_nomodifiable()
+ new
+ call setline(1, [1, 2, 3, 4])
+ setl nomodifiable
+ diffthis
+ vnew
+ call setline(1, ['1x', 2, 3, 3, 4])
+ diffthis
+ call assert_fails('norm dp', 'E793:')
+ setl nomodifiable
+ call assert_fails('norm do', 'E21:')
+ %bwipe!
+endfunc
+
+func Test_diff_filler()
+ new
+ call setline(1, [1, 2, 3, 'x', 4])
+ diffthis
+ vnew
+ call setline(1, [1, 2, 'y', 'y', 3, 4])
+ diffthis
+ redraw
+
+ call assert_equal([0, 0, 0, 0, 0, 0, 0, 1, 0], map(range(-1, 7), 'diff_filler(v:val)'))
+ wincmd w
+ call assert_equal([0, 0, 0, 0, 2, 0, 0, 0], map(range(-1, 6), 'diff_filler(v:val)'))
+
+ %bwipe!
+endfunc
+
+func Test_diff_lastline()
+ enew!
+ only!
+ call setline(1, ['This is a ', 'line with five ', 'rows'])
+ diffthis
+ botright vert new
+ call setline(1, ['This is', 'a line with ', 'four rows'])
+ diffthis
+ 1
+ call feedkeys("Je a\<CR>", 'tx')
+ call feedkeys("Je a\<CR>", 'tx')
+ let w1lines = winline()
+ wincmd w
+ $
+ let w2lines = winline()
+ call assert_equal(w2lines, w1lines)
+ bwipe!
+ bwipe!
+endfunc
+
+func Test_diff_with_cursorline()
+ if !CanRunVimInTerminal()
+ return
+ endif
+
+ call writefile([
+ \ 'hi CursorLine ctermbg=red ctermfg=white',
+ \ 'set cursorline',
+ \ 'call setline(1, ["foo","foo","foo","bar"])',
+ \ 'vnew',
+ \ 'call setline(1, ["bee","foo","foo","baz"])',
+ \ 'windo diffthis',
+ \ '2wincmd w',
+ \ ], 'Xtest_diff_cursorline')
+ let buf = RunVimInTerminal('-S Xtest_diff_cursorline', {})
+
+ call VerifyScreenDump(buf, 'Test_diff_with_cursorline_01', {})
+ call term_sendkeys(buf, "j")
+ call VerifyScreenDump(buf, 'Test_diff_with_cursorline_02', {})
+ call term_sendkeys(buf, "j")
+ call VerifyScreenDump(buf, 'Test_diff_with_cursorline_03', {})
+
+ " clean up
+ call StopVimInTerminal(buf)
+ call delete('Xtest_diff_cursorline')
+endfunc
+
+func Test_diff_of_diff()
+ if !CanRunVimInTerminal()
+ return
+ endif
+
+ call writefile([
+ \ 'call setline(1, ["aa","bb","cc","@@ -3,2 +5,7 @@","dd","ee","ff"])',
+ \ 'vnew',
+ \ 'call setline(1, ["aa","bb","cc"])',
+ \ 'windo diffthis',
+ \ ], 'Xtest_diff_diff')
+ let buf = RunVimInTerminal('-S Xtest_diff_diff', {})
+
+ call VerifyScreenDump(buf, 'Test_diff_of_diff_01', {})
+
+ " clean up
+ call StopVimInTerminal(buf)
+ call delete('Xtest_diff_diff')
+endfunc