xref: /vim-8.2.3635/src/testdir/test_const.vim (revision 9937a055) 
1" Test for :const
2
3func s:noop()
4endfunc
5
6func Test_define_var_with_lock()
7    const i = 1
8    const f = 1.1
9    const s = 'vim'
10    const F = funcref('s:noop')
11    const l = [1, 2, 3]
12    const d = {'foo': 10}
13    if has('channel')
14      const j = test_null_job()
15      const c = test_null_channel()
16    endif
17    const b = v:true
18    const n = v:null
19    const bl = 0zC0FFEE
20    const here =<< trim EOS
21    hello
22    EOS
23
24    call assert_fails('let i = 1', 'E741:')
25    call assert_fails('let f = 1.1', 'E741:')
26    call assert_fails('let s = "vim"', 'E741:')
27    call assert_fails('let F = funcref("s:noop")', 'E741:')
28    call assert_fails('let l = [1, 2, 3]', 'E741:')
29    call assert_fails('let d = {"foo": 10}', 'E741:')
30    if has('channel')
31      call assert_fails('let j = test_null_job()', 'E741:')
32      call assert_fails('let c = test_null_channel()', 'E741:')
33    endif
34    call assert_fails('let b = v:true', 'E741:')
35    call assert_fails('let n = v:null', 'E741:')
36    call assert_fails('let bl = 0zC0FFEE', 'E741:')
37    call assert_fails('let here = "xxx"', 'E741:')
38
39    " Unlet
40    unlet i
41    unlet f
42    unlet s
43    unlet F
44    unlet l
45    unlet d
46    unlet j
47    unlet c
48    unlet b
49    unlet n
50    unlet bl
51    unlet here
52endfunc
53
54func Test_define_l_var_with_lock()
55    " With l: prefix
56    const l:i = 1
57    const l:f = 1.1
58    const l:s = 'vim'
59    const l:F = funcref('s:noop')
60    const l:l = [1, 2, 3]
61    const l:d = {'foo': 10}
62    if has('channel')
63      const l:j = test_null_job()
64      const l:c = test_null_channel()
65    endif
66    const l:b = v:true
67    const l:n = v:null
68    const l:bl = 0zC0FFEE
69    const l:here =<< trim EOS
70    hello
71    EOS
72
73    call assert_fails('let l:i = 1', 'E741:')
74    call assert_fails('let l:f = 1.1', 'E741:')
75    call assert_fails('let l:s = "vim"', 'E741:')
76    call assert_fails('let l:F = funcref("s:noop")', 'E741:')
77    call assert_fails('let l:l = [1, 2, 3]', 'E741:')
78    call assert_fails('let l:d = {"foo": 10}', 'E741:')
79    if has('channel')
80      call assert_fails('let l:j = test_null_job()', 'E741:')
81      call assert_fails('let l:c = test_null_channel()', 'E741:')
82    endif
83    call assert_fails('let l:b = v:true', 'E741:')
84    call assert_fails('let l:n = v:null', 'E741:')
85    call assert_fails('let l:bl = 0zC0FFEE', 'E741:')
86    call assert_fails('let l:here = "xxx"', 'E741:')
87
88    " Unlet
89    unlet l:i
90    unlet l:f
91    unlet l:s
92    unlet l:F
93    unlet l:l
94    unlet l:d
95    unlet l:j
96    unlet l:c
97    unlet l:b
98    unlet l:n
99    unlet l:bl
100    unlet l:here
101endfunc
102
103func Test_define_script_var_with_lock()
104    const s:x = 0
105    call assert_fails('let s:x = 1', 'E741:')
106    unlet s:x
107endfunc
108
109func Test_descructuring_with_lock()
110    const [a, b, c] = [1, 1.1, 'vim']
111
112    call assert_fails('let a = 1', 'E741:')
113    call assert_fails('let b = 1.1', 'E741:')
114    call assert_fails('let c = "vim"', 'E741:')
115
116    const [d; e] = [1, 1.1, 'vim']
117    call assert_fails('let d = 1', 'E741:')
118    call assert_fails('let e = [2.2, "a"]', 'E741:')
119endfunc
120
121func Test_cannot_modify_existing_variable()
122    let i = 1
123    let f = 1.1
124    let s = 'vim'
125    let F = funcref('s:noop')
126    let l = [1, 2, 3]
127    let d = {'foo': 10}
128    if has('channel')
129      let j = test_null_job()
130      let c = test_null_channel()
131    endif
132    let b = v:true
133    let n = v:null
134    let bl = 0zC0FFEE
135
136    call assert_fails('const i = 1', 'E995:')
137    call assert_fails('const f = 1.1', 'E995:')
138    call assert_fails('const s = "vim"', 'E995:')
139    call assert_fails('const F = funcref("s:noop")', 'E995:')
140    call assert_fails('const l = [1, 2, 3]', 'E995:')
141    call assert_fails('const d = {"foo": 10}', 'E995:')
142    if has('channel')
143      call assert_fails('const j = test_null_job()', 'E995:')
144      call assert_fails('const c = test_null_channel()', 'E995:')
145    endif
146    call assert_fails('const b = v:true', 'E995:')
147    call assert_fails('const n = v:null', 'E995:')
148    call assert_fails('const bl = 0zC0FFEE', 'E995:')
149    call assert_fails('const [i, f, s] = [1, 1.1, "vim"]', 'E995:')
150
151    const i2 = 1
152    const f2 = 1.1
153    const s2 = 'vim'
154    const F2 = funcref('s:noop')
155    const l2 = [1, 2, 3]
156    const d2 = {'foo': 10}
157    if has('channel')
158      const j2 = test_null_job()
159      const c2 = test_null_channel()
160    endif
161    const b2 = v:true
162    const n2 = v:null
163    const bl2 = 0zC0FFEE
164
165    call assert_fails('const i2 = 1', 'E995:')
166    call assert_fails('const f2 = 1.1', 'E995:')
167    call assert_fails('const s2 = "vim"', 'E995:')
168    call assert_fails('const F2 = funcref("s:noop")', 'E995:')
169    call assert_fails('const l2 = [1, 2, 3]', 'E995:')
170    call assert_fails('const d2 = {"foo": 10}', 'E995:')
171    if has('channel')
172      call assert_fails('const j2 = test_null_job()', 'E995:')
173      call assert_fails('const c2 = test_null_channel()', 'E995:')
174    endif
175    call assert_fails('const b2 = v:true', 'E995:')
176    call assert_fails('const n2 = v:null', 'E995:')
177    call assert_fails('const bl2 = 0zC0FFEE', 'E995:')
178    call assert_fails('const [i2, f2, s2] = [1, 1.1, "vim"]', 'E995:')
179endfunc
180
181func Test_const_with_index_access()
182    let l = [1, 2, 3]
183    call assert_fails('const l[0] = 4', 'E996:')
184    call assert_fails('const l[0:1] = [1, 2]', 'E996:')
185
186    let d = {'aaa': 0}
187    call assert_fails("const d['aaa'] = 4", 'E996:')
188    call assert_fails("const d.aaa = 4", 'E996:')
189endfunc
190
191func Test_const_with_compound_assign()
192    let i = 0
193    call assert_fails('const i += 4', 'E995:')
194    call assert_fails('const i -= 4', 'E995:')
195    call assert_fails('const i *= 4', 'E995:')
196    call assert_fails('const i /= 4', 'E995:')
197    call assert_fails('const i %= 4', 'E995:')
198
199    let s = 'a'
200    call assert_fails('const s .= "b"', 'E995:')
201
202    let [a, b, c] = [1, 2, 3]
203    call assert_fails('const [a, b, c] += [4, 5, 6]', 'E995:')
204
205    let [d; e] = [1, 2, 3]
206    call assert_fails('const [d; e] += [4, 5, 6]', 'E995:')
207endfunc
208
209func Test_const_with_special_variables()
210    call assert_fails('const $FOO = "hello"', 'E996:')
211    call assert_fails('const @a = "hello"', 'E996:')
212    call assert_fails('const &filetype = "vim"', 'E996:')
213    call assert_fails('const &l:filetype = "vim"', 'E996:')
214    call assert_fails('const &g:encoding = "utf-8"', 'E996:')
215endfunc
216
217func Test_lock_depth_is_1()
218    const l = [1, 2, 3]
219    const d = {'foo': 10}
220
221    " Modify list
222    call add(l, 4)
223    let l[0] = 42
224
225    " Modify dict
226    let d['bar'] = 'hello'
227    let d.foo = 44
228endfunc
229