xref: /vim-8.2.3635/src/testdir/test_unlet.vim (revision 8dfcce3a) 
1" Tests for :unlet
2
3func Test_read_only()
4  " these caused a crash
5  call assert_fails('unlet count', 'E795:')
6  call assert_fails('unlet errmsg', 'E795:')
7endfunc
8
9func Test_existing()
10  let does_exist = 1
11  call assert_true(exists('does_exist'))
12  unlet does_exist
13  call assert_false(exists('does_exist'))
14endfunc
15
16func Test_not_existing()
17  unlet! does_not_exist
18  call assert_fails('unlet does_not_exist', 'E108:')
19endfunc
20
21func Test_unlet_fails()
22  call assert_fails('unlet v:["count"]', 'E46:')
23  call assert_fails('unlet $', 'E475:')
24endfunc
25
26func Test_unlet_env()
27  let envcmd = has('win32') ? 'set' : 'env'
28
29  let $FOOBAR = 'test'
30  let found = 0
31  for kv in split(system(envcmd), "\r*\n")
32    if kv == 'FOOBAR=test'
33      let found = 1
34    endif
35  endfor
36  call assert_equal(1, found)
37
38  unlet $FOOBAR
39  let found = 0
40  for kv in split(system(envcmd), "\r*\n")
41    if kv == 'FOOBAR=test'
42      let found = 1
43    endif
44  endfor
45  call assert_equal(0, found)
46
47  unlet $MUST_NOT_BE_AN_ERROR
48endfunc
49
50func Test_unlet_complete()
51  let g:FOOBAR = 1
52  call feedkeys(":unlet g:FOO\t\n", 'tx')
53  call assert_true(!exists('g:FOOBAR'))
54
55  let $FOOBAR = 1
56  call feedkeys(":unlet $FOO\t\n", 'tx')
57  call assert_true(!exists('$FOOBAR') || empty($FOOBAR))
58endfunc
59
60" vim: shiftwidth=2 sts=2 expandtab
61