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patch 8.1.0956: using context:0 in 'diffopt' does not work well

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Problem:    Using context:0 in 'diffopt' does not work well.
Solution:   Make zero context do the same as one line context. (closes #4005)
This commit is contained in:
Bram Moolenaar
2019-02-19 23:00:50 +01:00
parent 66ae3d199f
commit b9ddda6c2d
6 changed files with 74 additions and 1 deletions
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11
src/testdir/test_diffmode.vim
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@@ -783,6 +783,17 @@ func Test_diff_screen()
call WriteDiffFiles(buf, [1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])
call VerifyBoth(buf, 'Test_diff_06', '')
" Variants on test 6 with different context settings
call term_sendkeys(buf, ":set diffopt+=context:2\<cr>")
call VerifyScreenDump(buf, 'Test_diff_06.2', {})
call term_sendkeys(buf, ":set diffopt-=context:2\<cr>")
call term_sendkeys(buf, ":set diffopt+=context:1\<cr>")
call VerifyScreenDump(buf, 'Test_diff_06.1', {})
call term_sendkeys(buf, ":set diffopt-=context:1\<cr>")
call term_sendkeys(buf, ":set diffopt+=context:0\<cr>")
call VerifyScreenDump(buf, 'Test_diff_06.0', {})
call term_sendkeys(buf, ":set diffopt-=context:0\<cr>")
" Test 7 - 9: Test normal/patience/histogram diff algorithm
call WriteDiffFiles(buf, ['#include <stdio.h>', '', '// Frobs foo heartily', 'int frobnitz(int foo)', '{',
\ ' int i;', ' for(i = 0; i < 10; i++)', ' {', ' printf("Your answer is: ");',