diff --git a/src/Makefile b/src/Makefile
index 06204bd..7752fa1 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2100,14 +2100,14 @@
 	test_listchars \
 	test_search_mbyte \
 	test_wordcount \
-	test3 test4 test5 test7 test8 \
+	test3 test8 \
 	test11 test12 test14 test15 test17 test19 \
 	test20 test25 test28 test29 \
-	test30 test31 test32 test34 test36 test37 test38 test39 \
+	test30 test32 test34 test36 test37 test38 test39 \
 	test40 test42 test44 test45 test48 test49 \
 	test50 test52 test54 test55 test59 \
-	test60 test64 test66 test68 test69 \
-	test70 test72 test73 test77 test78 test79 \
+	test64 test66 test68 test69 \
+	test70 test72 test73 test77 test79 \
 	test83 test85 test86 test87 test88 \
 	test94 test95 test99 \
 	test108:
@@ -2149,6 +2149,7 @@
 	test_ex_z \
 	test_exec_while_if \
 	test_execute_func \
+	test_exists \
 	test_exists_autocmd \
 	test_expand \
 	test_expand_dllpath \
@@ -2279,6 +2280,7 @@
 	test_virtualedit \
 	test_visual \
 	test_winbar \
+	test_winbuf_close \
 	test_window_cmd \
 	test_window_id \
 	test_windows_home \
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index e27ee93..eb13761 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -14,9 +14,6 @@
 # Tests that run on all systems.
 SCRIPTS_ALL = \
 	test3.out \
-	test4.out \
-	test5.out \
-	test7.out \
 	test8.out \
 	test14.out \
 	test15.out \
@@ -24,7 +21,6 @@
 	test20.out \
 	test28.out \
 	test29.out \
-	test31.out \
 	test34.out \
 	test36.out \
 	test37.out \
@@ -36,7 +32,6 @@
 	test45.out \
 	test48.out \
 	test55.out \
-	test60.out \
 	test64.out \
 	test66.out \
 	test68.out \
@@ -89,7 +84,6 @@
 	test32.out \
 	test59.out \
 	test72.out \
-	test78.out \
 	test83.out
 
 
@@ -125,6 +119,7 @@
 	    test_digraph.res \
 	    test_display.res \
 	    test_edit.res \
+	    test_exists.res \
 	    test_farsi.res \
 	    test_file_size.res \
 	    test_fnameescape.res \
@@ -196,6 +191,7 @@
 	    test_vimscript.res \
 	    test_visual.res \
 	    test_winbar.res \
+	    test_winbuf_close.res \
 	    test_window_id.res \
 	    test_windows_home.res \
 	    test_writefile.res \
@@ -207,6 +203,4 @@
 # Explicit dependencies.
 test49.out: test49.vim
 
-test60.out: test60.vim
-
 test_options.res test_alot.res: opt_test.vim
diff --git a/src/testdir/Make_ming.mak b/src/testdir/Make_ming.mak
index c5a5dc0..ecfa97e 100644
--- a/src/testdir/Make_ming.mak
+++ b/src/testdir/Make_ming.mak
@@ -68,7 +68,7 @@
 fixff:
 	-$(VIMPROG) -u dos.vim $(NO_INITS) "+argdo set ff=dos|upd" +q *.in *.ok
 	-$(VIMPROG) -u dos.vim $(NO_INITS) "+argdo set ff=unix|upd" +q \
-		dotest.in test60.ok test_listchars.ok \
+		dotest.in test_listchars.ok \
 		test_wordcount.ok
 
 clean:
diff --git a/src/testdir/Make_vms.mms b/src/testdir/Make_vms.mms
index 5d7770d..efed68f 100644
--- a/src/testdir/Make_vms.mms
+++ b/src/testdir/Make_vms.mms
@@ -73,20 +73,20 @@
 
 .SUFFIXES : .out .in
 
-SCRIPT = test1.out  test3.out  test4.out  test5.out  \
-       test7.out  test8.out  \
+SCRIPT = test1.out test3.out \
+       test8.out  \
        test14.out test15.out \
        test19.out test20.out \
-       test28.out test29.out test30.out test31.out test32.out \
+       test28.out test29.out test30.out test32.out \
        test34.out test36.out test37.out \
        test38.out test39.out test40.out test42.out \
        test44.out test45.out \
        test48.out test49.out test54.out \
-       test55.out test60.out \
+       test55.out \
        test64.out \
        test66.out test68.out test69.out \
        test72.out \
-       test77a.out test78.out test79.out \
+       test77a.out test79.out \
        test88.out \
        test94.out \
        test95.out test99.out \
diff --git a/src/testdir/main.aap b/src/testdir/main.aap
index eb80a81..54f7eb2 100644
--- a/src/testdir/main.aap
+++ b/src/testdir/main.aap
@@ -4,12 +4,12 @@
 
 VimProg ?= ../vim
 
-Scripts = test1.out test2.out test3.out test4.out test5.out test6.out
-		test7.out test8.out test11.out
+Scripts = test1.out test2.out test3.out test6.out
+		test8.out test11.out
 		test12.out  test13.out test14.out test15.out test17.out
 		test18.out test19.out test20.out test21.out
 		test25.out test27.out
-		test28.out test29.out test30.out test31.out test32.out
+		test28.out test29.out test30.out test32.out
 		test34.out test36.out test37.out
 		test38.out test39.out test40.out test42.out
 		test44.out test45.out test46.out test47.out
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index d07710a..245b51c 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -250,6 +250,9 @@
 
 " Execute the tests in alphabetical order.
 for s:test in sort(s:tests)
+  " Silence, please!
+  set belloff=all
+
   call RunTheTest(s:test)
 
   if len(v:errors) > 0 && index(s:flaky, s:test) >= 0
diff --git a/src/testdir/test31.in b/src/testdir/test31.in
deleted file mode 100644
index ff5a499..0000000
--- a/src/testdir/test31.in
+++ /dev/null
@@ -1,95 +0,0 @@
-Test for commands that close windows and/or buffers:
-:quit
-:close
-:hide
-:only
-:sall
-:all
-:ball
-:buf
-:edit
-
-STARTTEST
-:so small.vim
-GA 1:$w! Xtest1
-$r2:$w! Xtest2
-$r3:$w! Xtest3
-:n! Xtest1 Xtest2
-A 1:set hidden
-:" test for working :n when hidden set; write "testtext 2"
-:n
-:w! test.out
-:" test for failing :rew when hidden not set; write "testtext 2 2"
-:set nohidden
-A 2:rew
-:w >>test.out
-:" test for working :rew when hidden set; write "testtext 1 1"
-:set hidden
-:rew
-:w >>test.out
-:" test for :all keeping a buffer when it's modified; write "testtext 1 1 1"
-:set nohidden
-A 1:sp
-:n Xtest2 Xtest3
-:all
-:1wincmd w
-:w >>test.out
-:" test abandoning changed buffer, should be unloaded even when 'hidden' set
-:" write "testtext 2 2" twice
-:set hidden
-A 1:q!
-:w >>test.out
-:unhide
-:w >>test.out
-:" test ":hide" hides anyway when 'hidden' not set; write "testtext 3"
-:set nohidden
-A 2:hide
-:w >>test.out
-:" test ":edit" failing in modified buffer when 'hidden' not set
-:" write "testtext 3 3"
-A 3:e Xtest1
-:w >>test.out
-:" test ":edit" working in modified buffer when 'hidden' set; write "testtext 1"
-:set hidden
-:e Xtest1
-:w >>test.out
-:" test ":close" not hiding when 'hidden' not set in modified buffer;
-:" write "testtext 3 3 3"
-:sp Xtest3
-:set nohidden
-A 3:close
-:w >>test.out
-:" test ":close!" does hide when 'hidden' not set in modified buffer;
-:" write "testtext 1"
-A 3:close!
-:w >>test.out
-:set nohidden
-:" test ":all!" hides changed buffer; write "testtext 2 2 2"
-:sp Xtest4
-GA 4:all!
-:1wincmd w
-:w >>test.out
-:"
-:" test ":q!" and hidden buffer.
-:bw! Xtest1 Xtest2 Xtest3 Xtest4
-:sp Xtest1
-:wincmd w
-:bw!
-:set modified
-:bot sp Xtest2
-:set modified
-:bot sp Xtest3
-:set modified
-:wincmd t
-:hide
-:q!
-:w >>test.out
-:q!
-:w >>test.out
-:q!
-:call append(line('$'), "Oh, Not finished yet.")
-:w >>test.out
-:qa!
-ENDTEST
-
-testtext
diff --git a/src/testdir/test31.ok b/src/testdir/test31.ok
deleted file mode 100644
index 3953197..0000000
--- a/src/testdir/test31.ok
+++ /dev/null
@@ -1,14 +0,0 @@
-testtext 2
-testtext 2 2
-testtext 1 1
-testtext 1 1 1
-testtext 2 2
-testtext 2 2
-testtext 3
-testtext 3 3
-testtext 1
-testtext 3 3 3
-testtext 1
-testtext 2 2 2
-testtext 3
-testtext 1
diff --git a/src/testdir/test4.in b/src/testdir/test4.in
deleted file mode 100644
index b3ee49b..0000000
--- a/src/testdir/test4.in
+++ /dev/null
@@ -1,34 +0,0 @@
-Test for autocommand that changes current buffer on BufEnter event.
-Check if modelines are interpreted for the correct buffer.
-
-STARTTEST
-:so small.vim
-:set nocompatible viminfo+=nviminfo
-:au BufEnter Xxx brew
-/start of
-:.,/end of/w! Xxx   " write test file Xxx
-:set ai modeline modelines=3
-:sp Xxx             " split to Xxx, autocmd will do :brew
-G?this is a
-othis should be auto-indented
-:                   " Append text with autoindent to this file
-:au! BufEnter Xxx
-:buf Xxx            " go to Xxx, no autocmd anymore
-G?this is a
-othis should be in column 1:wq " append text without autoindent to Xxx
-G:r Xxx             " include Xxx in the current file
-:set fo+=r          " issue #57 do not move cursor on <c-o> when autoindent is set
-Go# abcdef2hi
-d0o# abcdef2hid0:
-:?startstart?,$w! test.out
-:qa!
-ENDTEST
-
-startstart
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-end of test file Xxx
diff --git a/src/testdir/test4.ok b/src/testdir/test4.ok
deleted file mode 100644
index d032e4c..0000000
--- a/src/testdir/test4.ok
+++ /dev/null
@@ -1,20 +0,0 @@
-startstart
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-	this should be auto-indented
-end of test file Xxx
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-this should be in column 1
-end of test file Xxx
-# abc
-def
-def
diff --git a/src/testdir/test5.in b/src/testdir/test5.in
deleted file mode 100644
index e19e20d..0000000
--- a/src/testdir/test5.in
+++ /dev/null
@@ -1,29 +0,0 @@
-Test for autocommand that deletes the current buffer on BufLeave event.
-Also test deleting the last buffer, should give a new, empty buffer.
-
-STARTTEST
-:so small.vim
-:au BufLeave Xxx bwipe
-/start of
-:.,/end of/w! Xxx               " write test file Xxx
-:sp Xxx                         " split to Xxx
-:bwipe                          " delete buffer Xxx, now we're back here
-G?this is a
-othis is some more text
-:                               " Append some text to this file
-:?start?,$w! test.out           " Write current file contents
-:bwipe test.out                 " delete alternate buffer
-:au bufleave test5.in bwipe
-:bwipe!                         " delete current buffer, get an empty one
-ithis is another test line:w >>test.out
-:                               " append an extra line to the output file
-:qa!
-ENDTEST
-
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-end of test file Xxx
diff --git a/src/testdir/test5.ok b/src/testdir/test5.ok
deleted file mode 100644
index 6743060..0000000
--- a/src/testdir/test5.ok
+++ /dev/null
@@ -1,9 +0,0 @@
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-this is some more text
-end of test file Xxx
-this is another test line
diff --git a/src/testdir/test60.in b/src/testdir/test60.in
deleted file mode 100644
index d3b299b..0000000
--- a/src/testdir/test60.in
+++ /dev/null
@@ -1,601 +0,0 @@
-Tests for the exists() and has() functions.  vim: set ft=vim ts=8 sw=2 :
-
-STARTTEST
-:so small.vim
-:function! RunTest(str, result)
-    if exists(a:str) == a:result
-	echo "OK"
-    else
-	echo "FAILED: Checking for " . a:str
-    endif
-endfunction
-:function! TestExists()
-    augroup myagroup
-	autocmd! BufEnter       *.my     echo "myfile edited"
-	autocmd! FuncUndefined  UndefFun exec "fu UndefFun()\nendfu"
-    augroup END
-    set rtp+=./sautest
-
-    let test_cases = []
-
-    " valid autocmd group
-    let test_cases += [['#myagroup', 1]]
-    " valid autocmd group with garbage
-    let test_cases += [['#myagroup+b', 0]]
-    " Valid autocmd group and event
-    let test_cases += [['#myagroup#BufEnter', 1]]
-    " Valid autocmd group, event and pattern
-    let test_cases += [['#myagroup#BufEnter#*.my', 1]]
-    " Valid autocmd event
-    let test_cases += [['#BufEnter', 1]]
-    " Valid autocmd event and pattern
-    let test_cases += [['#BufEnter#*.my', 1]]
-    " Non-existing autocmd group or event
-    let test_cases += [['#xyzagroup', 0]]
-    " Non-existing autocmd group and valid autocmd event
-    let test_cases += [['#xyzagroup#BufEnter', 0]]
-    " Valid autocmd group and event with no matching pattern
-    let test_cases += [['#myagroup#CmdwinEnter', 0]]
-    " Valid autocmd group and non-existing autocmd event
-    let test_cases += [['#myagroup#xyzacmd', 0]]
-    " Valid autocmd group and event and non-matching pattern
-    let test_cases += [['#myagroup#BufEnter#xyzpat', 0]]
-    " Valid autocmd event and non-matching pattern
-    let test_cases += [['#BufEnter#xyzpat', 0]]
-    " Empty autocmd group, event and pattern
-    let test_cases += [['###', 0]]
-    " Empty autocmd group and event or empty event and pattern
-    let test_cases += [['##', 0]]
-    " Valid autocmd event
-    let test_cases += [['##FileReadCmd', 1]]
-    " Non-existing autocmd event
-    let test_cases += [['##MySpecialCmd', 0]]
-
-    " Existing and working option (long form)
-    let test_cases += [['&textwidth', 1]]
-    " Existing and working option (short form)
-    let test_cases += [['&tw', 1]]
-    " Existing and working option with garbage
-    let test_cases += [['&tw-', 0]]
-    " Global option
-    let test_cases += [['&g:errorformat', 1]]
-    " Local option
-    let test_cases += [['&l:errorformat', 1]]
-    " Negative form of existing and working option (long form)
-    let test_cases += [['&nojoinspaces', 0]]
-    " Negative form of existing and working option (short form)
-    let test_cases += [['&nojs', 0]]
-    " Non-existing option
-    let test_cases += [['&myxyzoption', 0]]
-
-    " Existing and working option (long form)
-    let test_cases += [['+incsearch', 1]]
-    " Existing and working option with garbage
-    let test_cases += [['+incsearch!1', 0]]
-    " Existing and working option (short form)
-    let test_cases += [['+is', 1]]
-    " Existing option that is hidden.
-    let test_cases += [['+autoprint', 0]]
-
-    " Existing environment variable
-    let $EDITOR_NAME = 'Vim Editor'
-    let test_cases += [['$EDITOR_NAME', 1]]
-    " Non-existing environment variable
-    let test_cases += [['$NON_ENV_VAR', 0]]
-
-    " Valid internal function
-    let test_cases += [['*bufnr', 1]]
-    " Valid internal function with ()
-    let test_cases += [['*bufnr()', 1]]
-    " Non-existing internal function
-    let test_cases += [['*myxyzfunc', 0]]
-    " Valid internal function with garbage
-    let test_cases += [['*bufnr&6', 0]]
-
-    " Valid user defined function
-    let test_cases += [['*TestExists', 1]]
-    " Non-existing user defined function
-    let test_cases += [['*MyxyzFunc', 0]]
-
-    " Function that may be created by FuncUndefined event
-    let test_cases += [['*UndefFun', 0]]
-    " Function that may be created by script autoloading
-    let test_cases += [['*footest#F', 0]]
-
-    redir! > test.out
-
-    for [test_case, result] in test_cases
-        echo test_case . ": " . result
-        call RunTest(test_case, result)
-    endfor
-
-    " Valid internal command (full match)
-    echo ':edit: 2'
-    if exists(':edit') == 2
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid internal command (full match) with garbage
-    echo ':edit/a: 0'
-    if exists(':edit/a') == 0
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid internal command (partial match)
-    echo ':q: 1'
-    if exists(':q') == 1
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing internal command
-    echo ':invalidcmd: 0'
-    if !exists(':invalidcmd')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " User defined command (full match)
-    command! MyCmd :echo 'My command'
-    echo ':MyCmd: 2'
-    if exists(':MyCmd') == 2
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " User defined command (partial match)
-    command! MyOtherCmd :echo 'Another command'
-    echo ':My: 3'
-    if exists(':My') == 3
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Command modifier
-    echo ':rightbelow: 2'
-    if exists(':rightbelow') == 2
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing user defined command (full match)
-    delcommand MyCmd
-
-    echo ':MyCmd: 0'
-    if !exists(':MyCmd')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing user defined command (partial match)
-    delcommand MyOtherCmd
-
-    echo ':My: 0'
-    if !exists(':My')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid local variable
-    let local_var = 1
-    echo 'local_var: 1'
-    if exists('local_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid local variable with garbage
-    let local_var = 1
-    echo 'local_var%n: 0'
-    if !exists('local_var%n')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing local variable
-    unlet local_var
-    echo 'local_var: 0'
-    if !exists('local_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing autoload variable that may be autoloaded
-    echo 'footest#x: 0'
-    if !exists('footest#x')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid local list
-    let local_list = ["blue", "orange"]
-    echo 'local_list: 1'
-    if exists('local_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid local list item
-    echo 'local_list[1]: 1'
-    if exists('local_list[1]')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid local list item with garbage
-    echo 'local_list[1]+5: 0'
-    if !exists('local_list[1]+5')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Invalid local list item
-    echo 'local_list[2]: 0'
-    if !exists('local_list[2]')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing local list
-    unlet local_list
-    echo 'local_list: 0'
-    if !exists('local_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Valid local dictionary
-    let local_dict = {"xcord":100, "ycord":2}
-    echo 'local_dict: 1'
-    if exists('local_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing local dictionary
-    unlet local_dict
-    echo 'local_dict: 0'
-    if !exists('local_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing local curly-brace variable
-    let str = "local"
-    let curly_{str}_var = 1
-    echo 'curly_' . str . '_var: 1'
-    if exists('curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing local curly-brace variable
-    unlet curly_{str}_var
-    echo 'curly_' . str . '_var: 0'
-    if !exists('curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-
-    " Existing global variable
-    let g:global_var = 1
-    echo 'g:global_var: 1'
-    if exists('g:global_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing global variable with garbage
-    echo 'g:global_var-n: 1'
-    if !exists('g:global_var-n')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing global variable
-    unlet g:global_var
-    echo 'g:global_var: 0'
-    if !exists('g:global_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing global list
-    let g:global_list = ["blue", "orange"]
-    echo 'g:global_list: 1'
-    if exists('g:global_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing global list
-    unlet g:global_list
-    echo 'g:global_list: 0'
-    if !exists('g:global_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing global dictionary
-    let g:global_dict = {"xcord":100, "ycord":2}
-    echo 'g:global_dict: 1'
-    if exists('g:global_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing global dictionary
-    unlet g:global_dict
-    echo 'g:global_dict: 0'
-    if !exists('g:global_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing global curly-brace variable
-    let str = "global"
-    let g:curly_{str}_var = 1
-    echo 'g:curly_' . str . '_var: 1'
-    if exists('g:curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing global curly-brace variable
-    unlet g:curly_{str}_var
-    echo 'g:curly_' . str . '_var: 0'
-    if !exists('g:curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing window variable
-    echo 'w:window_var: 1'
-    let w:window_var = 1
-    if exists('w:window_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing window variable
-    unlet w:window_var
-    echo 'w:window_var: 0'
-    if !exists('w:window_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing window list
-    let w:window_list = ["blue", "orange"]
-    echo 'w:window_list: 1'
-    if exists('w:window_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing window list
-    unlet w:window_list
-    echo 'w:window_list: 0'
-    if !exists('w:window_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing window dictionary
-    let w:window_dict = {"xcord":100, "ycord":2}
-    echo 'w:window_dict: 1'
-    if exists('w:window_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing window dictionary
-    unlet w:window_dict
-    echo 'w:window_dict: 0'
-    if !exists('w:window_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing window curly-brace variable
-    let str = "window"
-    let w:curly_{str}_var = 1
-    echo 'w:curly_' . str . '_var: 1'
-    if exists('w:curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing window curly-brace variable
-    unlet w:curly_{str}_var
-    echo 'w:curly_' . str . '_var: 0'
-    if !exists('w:curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing buffer variable
-    echo 'b:buffer_var: 1'
-    let b:buffer_var = 1
-    if exists('b:buffer_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing buffer variable
-    unlet b:buffer_var
-    echo 'b:buffer_var: 0'
-    if !exists('b:buffer_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing buffer list
-    let b:buffer_list = ["blue", "orange"]
-    echo 'b:buffer_list: 1'
-    if exists('b:buffer_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing buffer list
-    unlet b:buffer_list
-    echo 'b:buffer_list: 0'
-    if !exists('b:buffer_list')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing buffer dictionary
-    let b:buffer_dict = {"xcord":100, "ycord":2}
-    echo 'b:buffer_dict: 1'
-    if exists('b:buffer_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing buffer dictionary
-    unlet b:buffer_dict
-    echo 'b:buffer_dict: 0'
-    if !exists('b:buffer_dict')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Existing buffer curly-brace variable
-    let str = "buffer"
-    let b:curly_{str}_var = 1
-    echo 'b:curly_' . str . '_var: 1'
-    if exists('b:curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing buffer curly-brace variable
-    unlet b:curly_{str}_var
-    echo 'b:curly_' . str . '_var: 0'
-    if !exists('b:curly_{str}_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Script-local tests
-    source test60.vim
-
-    " Existing Vim internal variable
-    echo 'v:version: 1'
-    if exists('v:version')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Non-existing Vim internal variable
-    echo 'v:non_exists_var: 0'
-    if !exists('v:non_exists_var')
-	echo "OK"
-    else
-	echo "FAILED"
-    endif
-
-    " Function arguments
-    function TestFuncArg(func_arg, ...)
-        echo 'a:func_arg: 1'
-        if exists('a:func_arg')
-            echo "OK"
-        else
-            echo "FAILED"
-        endif
-
-        echo 'a:non_exists_arg: 0'
-        if !exists('a:non_exists_arg')
-            echo "OK"
-        else
-            echo "FAILED"
-        endif
-
-        echo 'a:1: 1'
-        if exists('a:1')
-            echo "OK"
-        else
-            echo "FAILED"
-        endif
-
-        echo 'a:2: 0'
-        if !exists('a:2')
-            echo "OK"
-        else
-            echo "FAILED"
-        endif
-    endfunction
-
-    call TestFuncArg("arg1", "arg2")
-
-    echo ' g:footest#x =' g:footest#x
-    echo '   footest#F()' footest#F()
-    echo 'UndefFun()' UndefFun()
-
-    redir END
-endfunction
-:call TestExists()
-:"
-:delfunc TestExists
-:delfunc RunTest
-:delfunc TestFuncArg
-:edit! test.out
-:set ff=unix
-:w
-:qa!
-:while getchar(1) | call getchar() | endwhile
-ENDTEST
-
diff --git a/src/testdir/test60.ok b/src/testdir/test60.ok
deleted file mode 100644
index 0c382ad..0000000
--- a/src/testdir/test60.ok
+++ /dev/null
@@ -1,206 +0,0 @@
-
-#myagroup: 1
-OK
-#myagroup+b: 0
-OK
-#myagroup#BufEnter: 1
-OK
-#myagroup#BufEnter#*.my: 1
-OK
-#BufEnter: 1
-OK
-#BufEnter#*.my: 1
-OK
-#xyzagroup: 0
-OK
-#xyzagroup#BufEnter: 0
-OK
-#myagroup#CmdwinEnter: 0
-OK
-#myagroup#xyzacmd: 0
-OK
-#myagroup#BufEnter#xyzpat: 0
-OK
-#BufEnter#xyzpat: 0
-OK
-###: 0
-OK
-##: 0
-OK
-##FileReadCmd: 1
-OK
-##MySpecialCmd: 0
-OK
-&textwidth: 1
-OK
-&tw: 1
-OK
-&tw-: 0
-OK
-&g:errorformat: 1
-OK
-&l:errorformat: 1
-OK
-&nojoinspaces: 0
-OK
-&nojs: 0
-OK
-&myxyzoption: 0
-OK
-+incsearch: 1
-OK
-+incsearch!1: 0
-OK
-+is: 1
-OK
-+autoprint: 0
-OK
-$EDITOR_NAME: 1
-OK
-$NON_ENV_VAR: 0
-OK
-*bufnr: 1
-OK
-*bufnr(): 1
-OK
-*myxyzfunc: 0
-OK
-*bufnr&6: 0
-OK
-*TestExists: 1
-OK
-*MyxyzFunc: 0
-OK
-*UndefFun: 0
-OK
-*footest#F: 0
-OK
-:edit: 2
-OK
-:edit/a: 0
-OK
-:q: 1
-OK
-:invalidcmd: 0
-OK
-:MyCmd: 2
-OK
-:My: 3
-OK
-:rightbelow: 2
-OK
-:MyCmd: 0
-OK
-:My: 0
-OK
-local_var: 1
-OK
-local_var%n: 0
-OK
-local_var: 0
-OK
-footest#x: 0
-OK
-local_list: 1
-OK
-local_list[1]: 1
-OK
-local_list[1]+5: 0
-OK
-local_list[2]: 0
-OK
-local_list: 0
-OK
-local_dict: 1
-OK
-local_dict: 0
-OK
-curly_local_var: 1
-OK
-curly_local_var: 0
-OK
-g:global_var: 1
-OK
-g:global_var-n: 1
-OK
-g:global_var: 0
-OK
-g:global_list: 1
-OK
-g:global_list: 0
-OK
-g:global_dict: 1
-OK
-g:global_dict: 0
-OK
-g:curly_global_var: 1
-OK
-g:curly_global_var: 0
-OK
-w:window_var: 1
-OK
-w:window_var: 0
-OK
-w:window_list: 1
-OK
-w:window_list: 0
-OK
-w:window_dict: 1
-OK
-w:window_dict: 0
-OK
-w:curly_window_var: 1
-OK
-w:curly_window_var: 0
-OK
-b:buffer_var: 1
-OK
-b:buffer_var: 0
-OK
-b:buffer_list: 1
-OK
-b:buffer_list: 0
-OK
-b:buffer_dict: 1
-OK
-b:buffer_dict: 0
-OK
-b:curly_buffer_var: 1
-OK
-b:curly_buffer_var: 0
-OK
-s:script_var: 1
-OK
-s:script_var: 0
-OK
-s:script_list: 1
-OK
-s:script_list: 0
-OK
-s:script_dict: 1
-OK
-s:script_dict: 0
-OK
-s:curly_script_var: 1
-OK
-s:curly_script_var: 0
-OK
-*s:my_script_func: 1
-OK
-*s:my_script_func: 0
-OK
-v:version: 1
-OK
-v:non_exists_var: 0
-OK
-a:func_arg: 1
-OK
-a:non_exists_arg: 0
-OK
-a:1: 1
-OK
-a:2: 0
-OK
- g:footest#x = 1
-   footest#F() 0
-UndefFun() 0
diff --git a/src/testdir/test60.vim b/src/testdir/test60.vim
deleted file mode 100644
index f1157f7..0000000
--- a/src/testdir/test60.vim
+++ /dev/null
@@ -1,98 +0,0 @@
-" Vim script for exists() function test
-" Script-local variables are checked here
-
-" Existing script-local variable
-let s:script_var = 1
-echo 's:script_var: 1'
-if exists('s:script_var')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Non-existing script-local variable
-unlet s:script_var
-echo 's:script_var: 0'
-if !exists('s:script_var')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Existing script-local list
-let s:script_list = ["blue", "orange"]
-echo 's:script_list: 1'
-if exists('s:script_list')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Non-existing script-local list
-unlet s:script_list
-echo 's:script_list: 0'
-if !exists('s:script_list')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Existing script-local dictionary
-let s:script_dict = {"xcord":100, "ycord":2}
-echo 's:script_dict: 1'
-if exists('s:script_dict')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Non-existing script-local dictionary
-unlet s:script_dict
-echo 's:script_dict: 0'
-if !exists('s:script_dict')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Existing script curly-brace variable
-let str = "script"
-let s:curly_{str}_var = 1
-echo 's:curly_' . str . '_var: 1'
-if exists('s:curly_{str}_var')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Non-existing script-local curly-brace variable
-unlet s:curly_{str}_var
-echo 's:curly_' . str . '_var: 0'
-if !exists('s:curly_{str}_var')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Existing script-local function
-function! s:my_script_func()
-endfunction
-
-echo '*s:my_script_func: 1'
-if exists('*s:my_script_func')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-
-" Non-existing script-local function
-delfunction s:my_script_func
-
-echo '*s:my_script_func: 0'
-if !exists('*s:my_script_func')
-    echo "OK"
-else
-    echo "FAILED"
-endif
-unlet str
-
diff --git a/src/testdir/test7.in b/src/testdir/test7.in
deleted file mode 100644
index b9cc058..0000000
--- a/src/testdir/test7.in
+++ /dev/null
@@ -1,26 +0,0 @@
-Test for autocommand that changes the buffer list, when doing ":ball".
-
-STARTTEST
-:so small.vim
-/^start of
-A1:.,/end of/w! Xxx1   " write test file Xxx1
-:sp Xxx1
-:close
-$r2:.,/end of/w! Xxx2    " write test file Xxx2
-:sp Xxx2
-:close
-$r3:.,/end of/w! Xxx3    " write test file Xxx3
-:sp Xxx3
-:close
-:au BufReadPost Xxx2 bwipe
-$r4:ball                 " open window for all args, close Xxx2
-:.,$w! test.out          " Write contents of this file
-:w >>test.out        " Append contents of second window (Xxx1)
-:/^start of/,$w >>test.out   " Append contents of last window (this file)
-:qa!
-ENDTEST
-
-start of test file Xxx
-	this is a test
-	this is a test
-end of test file Xxx
diff --git a/src/testdir/test7.ok b/src/testdir/test7.ok
deleted file mode 100644
index a0d1ff9..0000000
--- a/src/testdir/test7.ok
+++ /dev/null
@@ -1,12 +0,0 @@
-start of test file Xxx4
-	this is a test
-	this is a test
-end of test file Xxx
-start of test file Xxx1
-	this is a test
-	this is a test
-end of test file Xxx
-start of test file Xxx4
-	this is a test
-	this is a test
-end of test file Xxx
diff --git a/src/testdir/test78.in b/src/testdir/test78.in
deleted file mode 100644
index e97f4a4..0000000
--- a/src/testdir/test78.in
+++ /dev/null
@@ -1,46 +0,0 @@
-Inserts 10000 lines with text to fill the swap file with two levels of pointer
-blocks.  Then recovers from the swap file and checks all text is restored.
-
-We need about 10000 lines of 100 characters to get two levels of pointer
-blocks.
-
-STARTTEST
-:so small.vim
-:set nocp fileformat=unix undolevels=-1 viminfo+=nviminfo belloff=all
-:e! Xtest
-ggdG
-:let text = "\tabcdefghijklmnoparstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnoparstuvwxyz0123456789"
-:let i = 1
-:let linecount = 10000
-:while i <= linecount | call append(i - 1, i . text) | let i += 1 | endwhile
-:preserve
-:" get the name of the swap file
-:redir => swapname
-:swapname
-:redir END
-:let swapname = substitute(swapname, '[[:blank:][:cntrl:]]*\(.\{-}\)[[:blank:][:cntrl:]]*$', '\1', '')
-:" make a copy of the swap file in Xswap
-:set bin
-:exe 'sp ' . swapname
-:w! Xswap
-:echo swapname
-:set nobin
-:new
-:only!
-:bwipe! Xtest
-:call rename('Xswap', swapname)
-:recover Xtest
-:call delete(swapname)
-:new
-:call append(0, 'recovery start')
-:wincmd w
-:let linedollar = line('$')
-:if linedollar < linecount | exe 'wincmd w' | call append(line('$'), "expected " . linecount . " lines but found only " . linedollar) | exe 'wincmd w' | let linecount = linedollar | endif
-:let i = 1
-:while i <= linecount | if getline(i) != i . text | exe 'wincmd w' | call append(line('$'), i . ' differs') | exe 'wincmd w' | endif | let i += 1 | endwhile
-:q!
-:call append(line('$'), 'recovery end')
-:w! test.out
-:qa!
-ENDTEST
-
diff --git a/src/testdir/test78.ok b/src/testdir/test78.ok
deleted file mode 100644
index 6c3ecef..0000000
--- a/src/testdir/test78.ok
+++ /dev/null
@@ -1,3 +0,0 @@
-recovery start
-
-recovery end
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index e9f4076..eb13563 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -436,6 +436,8 @@
     return
   endif
 
+  badd test_autocmd.vim
+
   call test_override('starting', 1)
   set nocp
   au OptionSet * :call s:AutoCommandOptionSet(expand("<amatch>"))
@@ -529,9 +531,10 @@
   let g:options=[['backup', 0, 1, 'local']]
   " try twice, first time, shouldn't trigger because option name is invalid,
   " second time, it should trigger
-  call assert_fails("call setbufvar(1, '&l:bk', 1)", "E355")
+  let bnum = bufnr('%')
+  call assert_fails("call setbufvar(bnum, '&l:bk', 1)", "E355")
   " should trigger, use correct option name
-  call setbufvar(1, '&backup', 1)
+  call setbufvar(bnum, '&backup', 1)
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
@@ -645,3 +648,129 @@
   new
   bwipe! Xfile1
 endfunc
+
+" Test for autocommand that changes the buffer list, when doing ":ball".
+func Test_Acmd_BufAll()
+  enew!
+  %bwipe!
+  call writefile(['Test file Xxx1'], 'Xxx1')
+  call writefile(['Test file Xxx2'], 'Xxx2')
+  call writefile(['Test file Xxx3'], 'Xxx3')
+
+  " Add three files to the buffer list
+  split Xxx1
+  close
+  split Xxx2
+  close
+  split Xxx3
+  close
+
+  " Wipe the buffer when the buffer is opened
+  au BufReadPost Xxx2 bwipe
+
+  call append(0, 'Test file Xxx4')
+  ball
+
+  call assert_equal(2, winnr('$'))
+  call assert_equal('Xxx1', bufname(winbufnr(winnr('$'))))
+  wincmd t
+
+  au! BufReadPost
+  %bwipe!
+  call delete('Xxx1')
+  call delete('Xxx2')
+  call delete('Xxx3')
+  enew! | only
+endfunc
+
+" Test for autocommand that changes current buffer on BufEnter event.
+" Check if modelines are interpreted for the correct buffer.
+func Test_Acmd_BufEnter()
+  %bwipe!
+  call writefile(['start of test file Xxx1',
+	      \ "\<Tab>this is a test",
+	      \ 'end of test file Xxx1'], 'Xxx1')
+  call writefile(['start of test file Xxx2',
+	      \ 'vim: set noai :',
+	      \ "\<Tab>this is a test",
+	      \ 'end of test file Xxx2'], 'Xxx2')
+
+  au BufEnter Xxx2 brew
+  set ai modeline modelines=3
+  edit Xxx1
+  " edit Xxx2, autocmd will do :brew
+  edit Xxx2
+  exe "normal G?this is a\<CR>"
+  " Append text with autoindent to this file
+  normal othis should be auto-indented
+  call assert_equal("\<Tab>this should be auto-indented", getline('.'))
+  call assert_equal(3, line('.'))
+  " Remove autocmd and edit Xxx2 again
+  au! BufEnter Xxx2
+  buf! Xxx2
+  exe "normal G?this is a\<CR>"
+  " append text without autoindent to Xxx
+  normal othis should be in column 1
+  call assert_equal("this should be in column 1", getline('.'))
+  call assert_equal(4, line('.'))
+
+  %bwipe!
+  call delete('Xxx1')
+  call delete('Xxx2')
+  set ai&vim modeline&vim modelines&vim
+endfunc
+
+" Test for issue #57
+" do not move cursor on <c-o> when autoindent is set
+func Test_ai_CTRL_O()
+  enew!
+  set ai
+  let save_fo = &fo
+  set fo+=r
+  exe "normal o# abcdef\<Esc>2hi\<CR>\<C-O>d0\<Esc>"
+  exe "normal o# abcdef\<Esc>2hi\<C-O>d0\<Esc>"
+  call assert_equal(['# abc', 'def', 'def'], getline(2, 4))
+
+  set ai&vim
+  let &fo = save_fo
+  enew!
+endfunc
+
+" Test for autocommand that deletes the current buffer on BufLeave event.
+" Also test deleting the last buffer, should give a new, empty buffer.
+func Test_BufLeave_Wipe()
+  %bwipe!
+  let content = ['start of test file Xxx',
+	      \ 'this is a test',
+	      \ 'end of test file Xxx']
+  call writefile(content, 'Xxx1')
+  call writefile(content, 'Xxx2')
+
+  au BufLeave Xxx2 bwipe
+  edit Xxx1
+  split Xxx2
+  " delete buffer Xxx2, we should be back to Xxx1
+  bwipe
+  call assert_equal('Xxx1', bufname('%'))
+  call assert_equal(1, winnr('$'))
+
+  " Create an alternate buffer
+  %write! test.out
+  call assert_equal('test.out', bufname('#'))
+  " delete alternate buffer
+  bwipe test.out
+  call assert_equal('Xxx1', bufname('%'))
+  call assert_equal('', bufname('#'))
+
+  au BufLeave Xxx1 bwipe
+  " delete current buffer, get an empty one
+  bwipe!
+  call assert_equal(1, line('$'))
+  call assert_equal('', bufname('%'))
+  call assert_equal(1, len(getbufinfo()))
+
+  call delete('Xxx1')
+  call delete('Xxx2')
+  %bwipe
+  au! BufLeave
+endfunc
diff --git a/src/testdir/test_exists.vim b/src/testdir/test_exists.vim
new file mode 100644
index 0000000..fd34be8
--- /dev/null
+++ b/src/testdir/test_exists.vim
@@ -0,0 +1,321 @@
+" Tests for the exists() function
+func Test_exists()
+  augroup myagroup
+      autocmd! BufEnter       *.my     echo "myfile edited"
+      autocmd! FuncUndefined  UndefFun exec "fu UndefFun()\nendfu"
+  augroup END
+  set rtp+=./sautest
+
+  " valid autocmd group
+  call assert_equal(1, exists('#myagroup'))
+  " valid autocmd group with garbage
+  call assert_equal(0, exists('#myagroup+b'))
+  " Valid autocmd group and event
+  call assert_equal(1, exists('#myagroup#BufEnter'))
+  " Valid autocmd group, event and pattern
+  call assert_equal(1, exists('#myagroup#BufEnter#*.my'))
+  " Valid autocmd event
+  call assert_equal(1, exists('#BufEnter'))
+  " Valid autocmd event and pattern
+  call assert_equal(1, exists('#BufEnter#*.my'))
+  " Non-existing autocmd group or event
+  call assert_equal(0, exists('#xyzagroup'))
+  " Non-existing autocmd group and valid autocmd event
+  call assert_equal(0, exists('#xyzagroup#BufEnter'))
+  " Valid autocmd group and event with no matching pattern
+  call assert_equal(0, exists('#myagroup#CmdwinEnter'))
+  " Valid autocmd group and non-existing autocmd event
+  call assert_equal(0, exists('#myagroup#xyzacmd'))
+  " Valid autocmd group and event and non-matching pattern
+  call assert_equal(0, exists('#myagroup#BufEnter#xyzpat'))
+  " Valid autocmd event and non-matching pattern
+  call assert_equal(0, exists('#BufEnter#xyzpat'))
+  " Empty autocmd group, event and pattern
+  call assert_equal(0, exists('###'))
+  " Empty autocmd group and event or empty event and pattern
+  call assert_equal(0, exists('##'))
+  " Valid autocmd event
+  call assert_equal(1, exists('##FileReadCmd'))
+  " Non-existing autocmd event
+  call assert_equal(0, exists('##MySpecialCmd'))
+
+  " Existing and working option (long form)
+  call assert_equal(1, exists('&textwidth'))
+  " Existing and working option (short form)
+  call assert_equal(1, exists('&tw'))
+  " Existing and working option with garbage
+  call assert_equal(0, exists('&tw-'))
+  " Global option
+  call assert_equal(1, exists('&g:errorformat'))
+  " Local option
+  call assert_equal(1, exists('&l:errorformat'))
+  " Negative form of existing and working option (long form)
+  call assert_equal(0, exists('&nojoinspaces'))
+  " Negative form of existing and working option (short form)
+  call assert_equal(0, exists('&nojs'))
+  " Non-existing option
+  call assert_equal(0, exists('&myxyzoption'))
+
+  " Existing and working option (long form)
+  call assert_equal(1, exists('+incsearch'))
+  " Existing and working option with garbage
+  call assert_equal(0, exists('+incsearch!1'))
+  " Existing and working option (short form)
+  call assert_equal(1, exists('+is'))
+  " Existing option that is hidden.
+  call assert_equal(0, exists('+autoprint'))
+
+  " Existing environment variable
+  let $EDITOR_NAME = 'Vim Editor'
+  call assert_equal(1, exists('$EDITOR_NAME'))
+  " Non-existing environment variable
+  call assert_equal(0, exists('$NON_ENV_VAR'))
+
+  " Valid internal function
+  call assert_equal(1, exists('*bufnr'))
+  " Valid internal function with ()
+  call assert_equal(1, exists('*bufnr()'))
+  " Non-existing internal function
+  call assert_equal(0, exists('*myxyzfunc'))
+  " Valid internal function with garbage
+  call assert_equal(0, exists('*bufnr&6'))
+  " Valid user defined function
+  call assert_equal(1, exists('*Test_exists'))
+  " Non-existing user defined function
+  call assert_equal(0, exists('*MyxyzFunc'))
+  " Function that may be created by FuncUndefined event
+  call assert_equal(0, exists('*UndefFun'))
+  " Function that may be created by script autoloading
+  call assert_equal(0, exists('*footest#F'))
+
+  " Valid internal command (full match)
+  call assert_equal(2, exists(':edit'))
+  " Valid internal command (full match) with garbage
+  call assert_equal(0, exists(':edit/a'))
+  " Valid internal command (partial match)
+  call assert_equal(1, exists(':q'))
+  " Non-existing internal command
+  call assert_equal(0, exists(':invalidcmd'))
+
+  " User defined command (full match)
+  command! MyCmd :echo 'My command'
+  call assert_equal(2, exists(':MyCmd'))
+  " User defined command (partial match)
+  command! MyOtherCmd :echo 'Another command'
+  call assert_equal(3, exists(':My'))
+
+  " Command modifier
+  call assert_equal(2, exists(':rightbelow'))
+
+  " Non-existing user defined command (full match)
+  delcommand MyCmd
+  call assert_equal(0, exists(':MyCmd'))
+
+  " Non-existing user defined command (partial match)
+  delcommand MyOtherCmd
+  call assert_equal(0, exists(':My'))
+
+  " Valid local variable
+  let local_var = 1
+  call assert_equal(1, exists('local_var'))
+  " Valid local variable with garbage
+  call assert_equal(0, exists('local_var%n'))
+  " Non-existing local variable
+  unlet local_var
+  call assert_equal(0, exists('local_var'))
+
+  " Non-existing autoload variable that may be autoloaded
+  call assert_equal(0, exists('footest#x'))
+
+  " Valid local list
+  let local_list = ["blue", "orange"]
+  call assert_equal(1, exists('local_list'))
+  " Valid local list item
+  call assert_equal(1, exists('local_list[1]'))
+  " Valid local list item with garbage
+  call assert_equal(0, exists('local_list[1]+5'))
+  " Invalid local list item
+  call assert_equal(0, exists('local_list[2]'))
+  " Non-existing local list
+  unlet local_list
+  call assert_equal(0, exists('local_list'))
+  " Valid local dictionary
+  let local_dict = {"xcord":100, "ycord":2}
+  call assert_equal(1, exists('local_dict'))
+  " Non-existing local dictionary
+  unlet local_dict
+  call assert_equal(0, exists('local_dict'))
+  " Existing local curly-brace variable
+  let str = "local"
+  let curly_{str}_var = 1
+  call assert_equal(1, exists('curly_{str}_var'))
+  " Non-existing local curly-brace variable
+  unlet curly_{str}_var
+  call assert_equal(0, exists('curly_{str}_var'))
+
+  " Existing global variable
+  let g:global_var = 1
+  call assert_equal(1, exists('g:global_var'))
+  " Existing global variable with garbage
+  call assert_equal(0, exists('g:global_var-n'))
+  " Non-existing global variable
+  unlet g:global_var
+  call assert_equal(0, exists('g:global_var'))
+  " Existing global list
+  let g:global_list = ["blue", "orange"]
+  call assert_equal(1, exists('g:global_list'))
+  " Non-existing global list
+  unlet g:global_list
+  call assert_equal(0, exists('g:global_list'))
+  " Existing global dictionary
+  let g:global_dict = {"xcord":100, "ycord":2}
+  call assert_equal(1, exists('g:global_dict'))
+  " Non-existing global dictionary
+  unlet g:global_dict
+  call assert_equal(0, exists('g:global_dict'))
+  " Existing global curly-brace variable
+  let str = "global"
+  let g:curly_{str}_var = 1
+  call assert_equal(1, exists('g:curly_{str}_var'))
+  " Non-existing global curly-brace variable
+  unlet g:curly_{str}_var
+  call assert_equal(0, exists('g:curly_{str}_var'))
+
+  " Existing window variable
+  let w:window_var = 1
+  call assert_equal(1, exists('w:window_var'))
+  " Non-existing window variable
+  unlet w:window_var
+  call assert_equal(0, exists('w:window_var'))
+  " Existing window list
+  let w:window_list = ["blue", "orange"]
+  call assert_equal(1, exists('w:window_list'))
+  " Non-existing window list
+  unlet w:window_list
+  call assert_equal(0, exists('w:window_list'))
+  " Existing window dictionary
+  let w:window_dict = {"xcord":100, "ycord":2}
+  call assert_equal(1, exists('w:window_dict'))
+  " Non-existing window dictionary
+  unlet w:window_dict
+  call assert_equal(0, exists('w:window_dict'))
+  " Existing window curly-brace variable
+  let str = "window"
+  let w:curly_{str}_var = 1
+  call assert_equal(1, exists('w:curly_{str}_var'))
+  " Non-existing window curly-brace variable
+  unlet w:curly_{str}_var
+  call assert_equal(0, exists('w:curly_{str}_var'))
+
+  " Existing tab variable
+  let t:tab_var = 1
+  call assert_equal(1, exists('t:tab_var'))
+  " Non-existing tab variable
+  unlet t:tab_var
+  call assert_equal(0, exists('t:tab_var'))
+  " Existing tab list
+  let t:tab_list = ["blue", "orange"]
+  call assert_equal(1, exists('t:tab_list'))
+  " Non-existing tab list
+  unlet t:tab_list
+  call assert_equal(0, exists('t:tab_list'))
+  " Existing tab dictionary
+  let t:tab_dict = {"xcord":100, "ycord":2}
+  call assert_equal(1, exists('t:tab_dict'))
+  " Non-existing tab dictionary
+  unlet t:tab_dict
+  call assert_equal(0, exists('t:tab_dict'))
+  " Existing tab curly-brace variable
+  let str = "tab"
+  let t:curly_{str}_var = 1
+  call assert_equal(1, exists('t:curly_{str}_var'))
+  " Non-existing tab curly-brace variable
+  unlet t:curly_{str}_var
+  call assert_equal(0, exists('t:curly_{str}_var'))
+
+  " Existing buffer variable
+  let b:buffer_var = 1
+  call assert_equal(1, exists('b:buffer_var'))
+  " Non-existing buffer variable
+  unlet b:buffer_var
+  call assert_equal(0, exists('b:buffer_var'))
+  " Existing buffer list
+  let b:buffer_list = ["blue", "orange"]
+  call assert_equal(1, exists('b:buffer_list'))
+  " Non-existing buffer list
+  unlet b:buffer_list
+  call assert_equal(0, exists('b:buffer_list'))
+  " Existing buffer dictionary
+  let b:buffer_dict = {"xcord":100, "ycord":2}
+  call assert_equal(1, exists('b:buffer_dict'))
+  " Non-existing buffer dictionary
+  unlet b:buffer_dict
+  call assert_equal(0, exists('b:buffer_dict'))
+  " Existing buffer curly-brace variable
+  let str = "buffer"
+  let b:curly_{str}_var = 1
+  call assert_equal(1, exists('b:curly_{str}_var'))
+  " Non-existing buffer curly-brace variable
+  unlet b:curly_{str}_var
+  call assert_equal(0, exists('b:curly_{str}_var'))
+
+  " Existing Vim internal variable
+  call assert_equal(1, exists('v:version'))
+  " Non-existing Vim internal variable
+  call assert_equal(0, exists('v:non_exists_var'))
+
+  " Existing script-local variable
+  let s:script_var = 1
+  call assert_equal(1, exists('s:script_var'))
+  " Non-existing script-local variable
+  unlet s:script_var
+  call assert_equal(0, exists('s:script_var'))
+  " Existing script-local list
+  let s:script_list = ["blue", "orange"]
+  call assert_equal(1, exists('s:script_list'))
+  " Non-existing script-local list
+  unlet s:script_list
+  call assert_equal(0, exists('s:script_list'))
+  " Existing script-local dictionary
+  let s:script_dict = {"xcord":100, "ycord":2}
+  call assert_equal(1, exists('s:script_dict'))
+  " Non-existing script-local dictionary
+  unlet s:script_dict
+  call assert_equal(0, exists('s:script_dict'))
+  " Existing script curly-brace variable
+  let str = "script"
+  let s:curly_{str}_var = 1
+  call assert_equal(1, exists('s:curly_{str}_var'))
+  " Non-existing script-local curly-brace variable
+  unlet s:curly_{str}_var
+  call assert_equal(0, exists('s:curly_{str}_var'))
+
+  " Existing script-local function
+  function! s:my_script_func()
+  endfunction
+
+  echo '*s:my_script_func: 1'
+  call assert_equal(1, exists('*s:my_script_func'))
+
+  " Non-existing script-local function
+  delfunction s:my_script_func
+
+  call assert_equal(0, exists('*s:my_script_func'))
+  unlet str
+
+  call assert_equal(1, g:footest#x)
+  call assert_equal(0, footest#F())
+  call assert_equal(0, UndefFun())
+endfunc
+
+" exists() test for Function arguments
+func FuncArg_Tests(func_arg, ...)
+  call assert_equal(1, exists('a:func_arg'))
+  call assert_equal(0, exists('a:non_exists_arg'))
+  call assert_equal(1, exists('a:1'))
+  call assert_equal(0, exists('a:2'))
+endfunc
+
+func Test_exists_funcarg()
+  call FuncArg_Tests("arg1", "arg2")
+endfunc
diff --git a/src/testdir/test_recover.vim b/src/testdir/test_recover.vim
index 2e34985..6f7ff2b 100644
--- a/src/testdir/test_recover.vim
+++ b/src/testdir/test_recover.vim
@@ -15,4 +15,48 @@
   set dir&
 endfunc
 
-" TODO: move recover tests from test78.in to here.
+" Inserts 10000 lines with text to fill the swap file with two levels of pointer
+" blocks.  Then recovers from the swap file and checks all text is restored.
+"
+" We need about 10000 lines of 100 characters to get two levels of pointer
+" blocks.
+func Test_swap_file()
+  set fileformat=unix undolevels=-1 belloff=all
+  edit! Xtest
+  let text = "\tabcdefghijklmnoparstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnoparstuvwxyz0123456789"
+  let i = 1
+  let linecount = 10000
+  while i <= linecount
+    call append(i - 1, i . text)
+    let i += 1
+  endwhile
+  $delete
+  preserve
+  " get the name of the swap file
+  let swname = split(execute("swapname"))[0]
+  let swname = substitute(swname, '[[:blank:][:cntrl:]]*\(.\{-}\)[[:blank:][:cntrl:]]*$', '\1', '')
+  " make a copy of the swap file in Xswap
+  set binary
+  exe 'sp ' . swname
+  w! Xswap
+  set nobinary
+  new
+  only!
+  bwipe! Xtest
+  call rename('Xswap', swname)
+  recover Xtest
+  call delete(swname)
+  let linedollar = line('$')
+  call assert_equal(linecount, linedollar)
+  if linedollar < linecount
+    let linecount = linedollar
+  endif
+  let i = 1
+  while i <= linecount
+    call assert_equal(i . text, getline(i))
+    let i += 1
+  endwhile
+
+  set undolevels&
+  enew! | only
+endfunc
diff --git a/src/testdir/test_winbuf_close.vim b/src/testdir/test_winbuf_close.vim
new file mode 100644
index 0000000..ed64dd7
--- /dev/null
+++ b/src/testdir/test_winbuf_close.vim
@@ -0,0 +1,124 @@
+" Test for commands that close windows and/or buffers:
+" :quit
+" :close
+" :hide
+" :only
+" :sall
+" :all
+" :ball
+" :buf
+" :edit
+"
+func Test_winbuf_close()
+  enew | only
+
+  call writefile(['testtext 1'], 'Xtest1')
+  call writefile(['testtext 2'], 'Xtest2')
+  call writefile(['testtext 3'], 'Xtest3')
+
+  next! Xtest1 Xtest2
+  call setline(1, 'testtext 1 1')
+
+  " test for working :n when hidden set
+  set hidden
+  next
+  call assert_equal('Xtest2', bufname('%'))
+
+  " test for failing :rew when hidden not set
+  set nohidden
+  call setline(1, 'testtext 2 2')
+  call assert_fails('rewind', 'E37')
+  call assert_equal('Xtest2', bufname('%'))
+  call assert_equal('testtext 2 2', getline(1))
+
+  " test for working :rew when hidden set
+  set hidden
+  rewind
+  call assert_equal('Xtest1', bufname('%'))
+  call assert_equal('testtext 1 1', getline(1))
+
+  " test for :all keeping a buffer when it's modified
+  set nohidden
+  call setline(1, 'testtext 1 1 1')
+  split
+  next Xtest2 Xtest3
+  all
+  1wincmd w
+  call assert_equal('Xtest1', bufname('%'))
+  call assert_equal('testtext 1 1 1', getline(1))
+
+  " test abandoning changed buffer, should be unloaded even when 'hidden' set
+  set hidden
+  call setline(1, 'testtext 1 1 1 1')
+  quit!
+  call assert_equal('Xtest2', bufname('%'))
+  call assert_equal('testtext 2 2', getline(1))
+  unhide
+  call assert_equal('Xtest2', bufname('%'))
+  call assert_equal('testtext 2 2', getline(1))
+
+  " test ":hide" hides anyway when 'hidden' not set
+  set nohidden
+  call setline(1, 'testtext 2 2 2')
+  hide
+  call assert_equal('Xtest3', bufname('%'))
+  call assert_equal('testtext 3', getline(1))
+
+  " test ":edit" failing in modified buffer when 'hidden' not set
+  call setline(1, 'testtext 3 3')
+  call assert_fails('edit Xtest1', 'E37')
+  call assert_equal('Xtest3', bufname('%'))
+  call assert_equal('testtext 3 3', getline(1))
+
+  " test ":edit" working in modified buffer when 'hidden' set
+  set hidden
+  edit Xtest1
+  call assert_equal('Xtest1', bufname('%'))
+  call assert_equal('testtext 1', getline(1))
+
+  " test ":close" not hiding when 'hidden' not set in modified buffer
+  split Xtest3
+  set nohidden
+  call setline(1, 'testtext 3 3 3')
+  call assert_fails('close', 'E37')
+  call assert_equal('Xtest3', bufname('%'))
+  call assert_equal('testtext 3 3 3', getline(1))
+
+  " test ":close!" does hide when 'hidden' not set in modified buffer;
+  call setline(1, 'testtext 3 3 3 3')
+  close!
+  call assert_equal('Xtest1', bufname('%'))
+  call assert_equal('testtext 1', getline(1))
+
+  set nohidden
+
+  " test ":all!" hides changed buffer
+  split Xtest4
+  call setline(1, 'testtext 4')
+  all!
+  1wincmd w
+  call assert_equal('Xtest2', bufname('%'))
+  call assert_equal('testtext 2 2 2', getline(1))
+
+  " test ":q!" and hidden buffer.
+  bwipe! Xtest1 Xtest2 Xtest3 Xtest4
+  split Xtest1
+  wincmd w
+  bwipe!
+  set modified
+  bot split Xtest2
+  set modified
+  bot split Xtest3
+  set modified
+  wincmd t
+  hide
+  call assert_equal('Xtest2', bufname('%'))
+  quit!
+  call assert_equal('Xtest3', bufname('%'))
+  call assert_fails('silent! quit!', 'E162')
+  call assert_equal('Xtest1', bufname('%'))
+
+  call delete('Xtest1')
+  call delete('Xtest2')
+  call delete('Xtest3')
+endfunc
diff --git a/src/version.c b/src/version.c
index 6302ad2..398a668 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1186,
+/**/
     1185,
 /**/
     1184,