autocmd: add WinClosed event

- only fire once, just before freeing mem
- trigger when on a different buffer
- avoid recursive calls in another tab

1 files changed, 66 insertions, 0 deletions

diff --git a/test/functional/autocmd/autocmd_spec.lua b/test/functional/autocmd/autocmd_spec.lua
index 43534c9e7e..31c6edb940 100644
--- a/test/functional/autocmd/autocmd_spec.lua
+++ b/test/functional/autocmd/autocmd_spec.lua
@@ -2,6 +2,7 @@ local helpers = require('test.functional.helpers')(after_each)
 local Screen = require('test.functional.ui.screen')
 
 local dedent = helpers.dedent
+local neq = helpers.neq
 local eq = helpers.eq
 local eval = helpers.eval
 local feed = helpers.feed
@@ -40,6 +41,71 @@ describe('autocmd', function()
     assert.same(expected, eval('g:foo'))
   end)
 
+  it(':close triggers WinClosed event', function()
+    command('let g:triggered = 0')
+    command('new')
+    command('autocmd WinClosed <buffer> :let g:triggered+=1')
+    eq(0, eval('g:triggered'))
+    command('close')
+    eq(1, eval('g:triggered'))
+  end)
+
+  it(':bdelete triggers WinClosed event', function()
+    command('let g:triggered = 0')
+    command('autocmd WinClosed <buffer> :let g:triggered+=1')
+    local first_buffer = eval("bufnr('%')")
+    command('new')
+    command('bdelete ' .. first_buffer )
+    eq(1, eval('g:triggered'))
+  end)
+
+  it(':close triggers WinClosed event in another tab', function()
+    command('let g:triggered = 0')
+    local current_buffer = eval("bufnr('%')")
+    command('autocmd WinClosed <buffer> :let g:triggered+=1')
+    command('tabnew')
+    command('bdelete ' .. current_buffer)
+    eq(1, eval('g:triggered'))
+  end)
+
+  it('WinClosed events are not recursive in different window', function()
+    command('let g:triggered = 0')
+    local first_buffer = eval("bufnr('%')")
+    command('autocmd WinClosed <buffer> :let g:triggered+=1')
+    command('new')
+    local second_buffer = eval("bufnr('%')")
+    command('autocmd WinClosed <buffer> :bdelete ' .. first_buffer)
+    command('new')
+    neq(-1, funcs.bufwinnr(first_buffer))
+    command('bdelete ' .. second_buffer )
+    eq(0, eval('g:triggered'))
+
+    -- first event was triggered, second wasn't
+    eq(-1, funcs.bufwinnr(first_buffer))
+  end)
+
+  it('WinClosed events are not recursive in the same window', function()
+    command('let g:triggered = 0')
+    command('new')
+    local second_buffer = eval("bufnr('%')")
+    command('autocmd WinClosed <buffer> :let g:triggered+=1 | bdelete ' .. second_buffer)
+    neq(-1, funcs.bufwinnr(second_buffer))
+    eq(0, eval('g:triggered'))
+    command('bdelete ' .. second_buffer )
+    eq(-1, funcs.bufwinnr(second_buffer))
+    eq(1, eval('g:triggered'))
+  end)
+
+  it('WinClosed events are not recursive in different tab', function()
+    command('let g:triggered = 0')
+    command('new')
+    local second_buffer = eval("bufnr('%')")
+    command('autocmd WinClosed <buffer> :let g:triggered+=1 | bdelete ' .. second_buffer)
+    command('tabnew')
+    command('bdelete ' .. second_buffer )
+    eq(1, eval('g:triggered'))
+  end)
+
   it('v:vim_did_enter is 1 after VimEnter', function()
     eq(1, eval('v:vim_did_enter'))
   end)