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" tests for listener_add() and listener_remove()
func s:StoreList(s, l)
let s:start = a:s
let s:text = getline(a:s)
let s:list = a:l
endfunc
func s:AnotherStoreList(l)
let s:list2 = a:l
endfunc
func s:EvilStoreList(l)
let s:list3 = a:l
call assert_fails("call add(a:l, 'myitem')", "E742:")
endfunc
func Test_listening()
new
call setline(1, ['one', 'two'])
let s:list = []
let id = listener_add({b, s, e, a, l -> s:StoreList(s, l)})
call setline(1, 'one one')
call listener_flush()
call assert_equal([{'lnum': 1, 'end': 2, 'col': 1, 'added': 0}], s:list)
" Undo is also a change
set undolevels& " start new undo block
call append(2, 'two two')
undo
call assert_equal([{'lnum': 3, 'end': 3, 'col': 1, 'added': 1}], s:list)
redraw
" the two changes are not merged
call assert_equal([{'lnum': 3, 'end': 4, 'col': 1, 'added': -1}], s:list)
1
" Two listeners, both get called. Also check column.
call setline(1, ['one one', 'two'])
call listener_flush()
let id2 = listener_add({b, s, e, a, l -> s:AnotherStoreList(l)})
let s:list = []
let s:list2 = []
exe "normal $asome\<Esc>"
redraw
call assert_equal([{'lnum': 1, 'end': 2, 'col': 8, 'added': 0}], s:list)
call assert_equal([{'lnum': 1, 'end': 2, 'col': 8, 'added': 0}], s:list2)
" removing listener works
call listener_remove(id2)
call setline(1, ['one one', 'two'])
call listener_flush()
let s:list = []
let s:list2 = []
call setline(3, 'three')
redraw
call assert_equal([{'lnum': 3, 'end': 3, 'col': 1, 'added': 1}], s:list)
call assert_equal([], s:list2)
" a change above a previous change without a line number change is reported
" together
call setline(1, ['one one', 'two'])
call listener_flush()
call append(2, 'two two')
call setline(1, 'something')
call listener_flush()
call assert_equal([{'lnum': 3, 'end': 3, 'col': 1, 'added': 1},
\ {'lnum': 1, 'end': 2, 'col': 1, 'added': 0}], s:list)
" an insert just above a previous change that was the last one does not get
" merged
call setline(1, ['one one', 'two'])
call listener_flush()
let s:list = []
call setline(2, 'something')
call append(1, 'two two')
call assert_equal([{'lnum': 2, 'end': 3, 'col': 1, 'added': 0}], s:list)
call listener_flush()
call assert_equal([{'lnum': 2, 'end': 2, 'col': 1, 'added': 1}], s:list)
" an insert above a previous change causes a flush
call setline(1, ['one one', 'two'])
call listener_flush()
call setline(2, 'something')
call append(0, 'two two')
call assert_equal([{'lnum': 2, 'end': 3, 'col': 1, 'added': 0}], s:list)
call assert_equal('something', s:text)
call listener_flush()
call assert_equal([{'lnum': 1, 'end': 1, 'col': 1, 'added': 1}], s:list)
call assert_equal('two two', s:text)
" a delete at a previous change that was the last one does not get merged
call setline(1, ['one one', 'two'])
call listener_flush()
let s:list = []
call setline(2, 'something')
2del
call assert_equal([{'lnum': 2, 'end': 3, 'col': 1, 'added': 0}], s:list)
call listener_flush()
call assert_equal([{'lnum': 2, 'end': 3, 'col': 1, 'added': -1}], s:list)
" a delete above a previous change causes a flush
call setline(1, ['one one', 'two'])
call listener_flush()
call setline(2, 'another')
1del
call assert_equal([{'lnum': 2, 'end': 3, 'col': 1, 'added': 0}], s:list)
call assert_equal(2, s:start)
call assert_equal('another', s:text)
call listener_flush()
call assert_equal([{'lnum': 1, 'end': 2, 'col': 1, 'added': -1}], s:list)
call assert_equal('another', s:text)
" the "o" command first adds an empty line and then changes it
%del
call setline(1, ['one one', 'two'])
call listener_flush()
let s:list = []
exe "normal Gofour\<Esc>"
redraw
call assert_equal([{'lnum': 3, 'end': 3, 'col': 1, 'added': 1},
\ {'lnum': 3, 'end': 4, 'col': 1, 'added': 0}], s:list)
" Remove last listener
let s:list = []
call listener_remove(id)
call setline(1, 'asdfasdf')
redraw
call assert_equal([], s:list)
" Trying to change the list fails
let id = listener_add({b, s, e, a, l -> s:EvilStoreList(l)})
let s:list3 = []
call setline(1, 'asdfasdf')
redraw
call assert_equal([{'lnum': 1, 'end': 2, 'col': 1, 'added': 0}], s:list3)
call listener_remove(id)
bwipe!
endfunc
func s:StoreListArgs(buf, start, end, added, list)
let s:buf = a:buf
let s:start = a:start
let s:end = a:end
let s:added = a:added
let s:list = a:list
endfunc
func Test_listener_args()
new
call setline(1, ['one', 'two'])
let s:list = []
let id = listener_add('s:StoreListArgs')
" just one change
call setline(1, 'one one')
call listener_flush()
call assert_equal(bufnr(''), s:buf)
call assert_equal(1, s:start)
call assert_equal(2, s:end)
call assert_equal(0, s:added)
call assert_equal([{'lnum': 1, 'end': 2, 'col': 1, 'added': 0}], s:list)
" two disconnected changes
call setline(1, ['one', 'two', 'three', 'four'])
call listener_flush()
call setline(1, 'one one')
call setline(3, 'three three')
call listener_flush()
call assert_equal(bufnr(''), s:buf)
call assert_equal(1, s:start)
call assert_equal(4, s:end)
call assert_equal(0, s:added)
call assert_equal([{'lnum': 1, 'end': 2, 'col': 1, 'added': 0},
\ {'lnum': 3, 'end': 4, 'col': 1, 'added': 0}], s:list)
" add and remove lines
call setline(1, ['one', 'two', 'three', 'four', 'five', 'six'])
call listener_flush()
call append(2, 'two two')
4del
call append(5, 'five five')
call listener_flush()
call assert_equal(bufnr(''), s:buf)
call assert_equal(3, s:start)
call assert_equal(6, s:end)
call assert_equal(1, s:added)
call assert_equal([{'lnum': 3, 'end': 3, 'col': 1, 'added': 1},
\ {'lnum': 4, 'end': 5, 'col': 1, 'added': -1},
\ {'lnum': 6, 'end': 6, 'col': 1, 'added': 1}], s:list)
" split a line then insert one, should get two disconnected change lists
call setline(1, 'split here')
call listener_flush()
let s:list = []
exe "normal 1ggwi\<CR>\<Esc>"
1
normal o
call assert_equal([{'lnum': 1, 'end': 2, 'col': 7, 'added': 1}], s:list)
call listener_flush()
call assert_equal([{'lnum': 2, 'end': 2, 'col': 1, 'added': 1}], s:list)
call listener_remove(id)
bwipe!
endfunc
func s:StoreBufList(buf, start, end, added, list)
let s:bufnr = a:buf
let s:list = a:list
endfunc
func Test_listening_other_buf()
new
call setline(1, ['one', 'two'])
let bufnr = bufnr('')
normal ww
let id = listener_add(function('s:StoreBufList'), bufnr)
let s:list = []
call setbufline(bufnr, 1, 'hello')
redraw
call assert_equal(bufnr, s:bufnr)
call assert_equal([{'lnum': 1, 'end': 2, 'col': 1, 'added': 0}], s:list)
call listener_remove(id)
exe "buf " .. bufnr
bwipe!
endfunc
func Test_listener_garbage_collect()
func MyListener(x, bufnr, start, end, added, changes)
" NOP
endfunc
new
let id = listener_add(function('MyListener', [{}]), bufnr(''))
call test_garbagecollect_now()
" must not crach caused by invalid memory access
normal ia
call assert_true(v:true)
call listener_remove(id)
delfunc MyListener
bwipe!
endfunc
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