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-rw-r--r--src/testdir/test_const.vim335
1 files changed, 335 insertions, 0 deletions
diff --git a/src/testdir/test_const.vim b/src/testdir/test_const.vim
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+" Test for :const
+
+func s:noop()
+endfunc
+
+func Test_define_var_with_lock()
+ const i = 1
+ const f = 1.1
+ const s = 'vim'
+ const F = funcref('s:noop')
+ const l = [1, 2, 3]
+ const d = {'foo': 10}
+ if has('channel')
+ const j = test_null_job()
+ const c = test_null_channel()
+ endif
+ const b = v:true
+ const n = v:null
+ const bl = 0zC0FFEE
+ const here =<< trim EOS
+ hello
+ EOS
+
+ call assert_true(exists('i'))
+ call assert_true(exists('f'))
+ call assert_true(exists('s'))
+ call assert_true(exists('F'))
+ call assert_true(exists('l'))
+ call assert_true(exists('d'))
+ if has('channel')
+ call assert_true(exists('j'))
+ call assert_true(exists('c'))
+ endif
+ call assert_true(exists('b'))
+ call assert_true(exists('n'))
+ call assert_true(exists('bl'))
+ call assert_true(exists('here'))
+
+ call assert_fails('let i = 1', 'E741:')
+ call assert_fails('let f = 1.1', 'E741:')
+ call assert_fails('let s = "vim"', 'E741:')
+ call assert_fails('let F = funcref("s:noop")', 'E741:')
+ call assert_fails('let l = [1, 2, 3]', 'E741:')
+ call assert_fails('call filter(l, "v:val % 2 == 0")', 'E741:')
+ call assert_fails('let d = {"foo": 10}', 'E741:')
+ if has('channel')
+ call assert_fails('let j = test_null_job()', 'E741:')
+ call assert_fails('let c = test_null_channel()', 'E741:')
+ endif
+ call assert_fails('let b = v:true', 'E741:')
+ call assert_fails('let n = v:null', 'E741:')
+ call assert_fails('let bl = 0zC0FFEE', 'E741:')
+ call assert_fails('let here = "xxx"', 'E741:')
+
+ " Unlet
+ unlet i
+ unlet f
+ unlet s
+ unlet F
+ unlet l
+ unlet d
+ if has('channel')
+ unlet j
+ unlet c
+ endif
+ unlet b
+ unlet n
+ unlet bl
+ unlet here
+endfunc
+
+func Test_define_l_var_with_lock()
+ " With l: prefix
+ const l:i = 1
+ const l:f = 1.1
+ const l:s = 'vim'
+ const l:F = funcref('s:noop')
+ const l:l = [1, 2, 3]
+ const l:d = {'foo': 10}
+ if has('channel')
+ const l:j = test_null_job()
+ const l:c = test_null_channel()
+ endif
+ const l:b = v:true
+ const l:n = v:null
+ const l:bl = 0zC0FFEE
+ const l:here =<< trim EOS
+ hello
+ EOS
+
+ call assert_fails('let l:i = 1', 'E741:')
+ call assert_fails('let l:f = 1.1', 'E741:')
+ call assert_fails('let l:s = "vim"', 'E741:')
+ call assert_fails('let l:F = funcref("s:noop")', 'E741:')
+ call assert_fails('let l:l = [1, 2, 3]', 'E741:')
+ call assert_fails('let l:d = {"foo": 10}', 'E741:')
+ if has('channel')
+ call assert_fails('let l:j = test_null_job()', 'E741:')
+ call assert_fails('let l:c = test_null_channel()', 'E741:')
+ endif
+ call assert_fails('let l:b = v:true', 'E741:')
+ call assert_fails('let l:n = v:null', 'E741:')
+ call assert_fails('let l:bl = 0zC0FFEE', 'E741:')
+ call assert_fails('let l:here = "xxx"', 'E741:')
+
+ " Unlet
+ unlet l:i
+ unlet l:f
+ unlet l:s
+ unlet l:F
+ unlet l:l
+ unlet l:d
+ if has('channel')
+ unlet l:j
+ unlet l:c
+ endif
+ unlet l:b
+ unlet l:n
+ unlet l:bl
+ unlet l:here
+endfunc
+
+func Test_define_script_var_with_lock()
+ const s:x = 0
+ call assert_fails('let s:x = 1', 'E741:')
+ unlet s:x
+endfunc
+
+func Test_destructuring_with_lock()
+ const [a, b, c] = [1, 1.1, 'vim']
+
+ call assert_fails('let a = 1', 'E741:')
+ call assert_fails('let b = 1.1', 'E741:')
+ call assert_fails('let c = "vim"', 'E741:')
+
+ const [d; e] = [1, 1.1, 'vim']
+ call assert_fails('let d = 1', 'E741:')
+ call assert_fails('let e = [2.2, "a"]', 'E741:')
+endfunc
+
+func Test_cannot_modify_existing_variable()
+ let i = 1
+ let f = 1.1
+ let s = 'vim'
+ let F = funcref('s:noop')
+ let l = [1, 2, 3]
+ let d = {'foo': 10}
+ if has('channel')
+ let j = test_null_job()
+ let c = test_null_channel()
+ endif
+ let b = v:true
+ let n = v:null
+ let bl = 0zC0FFEE
+
+ call assert_fails('const i = 1', 'E995:')
+ call assert_fails('const f = 1.1', 'E995:')
+ call assert_fails('const s = "vim"', 'E995:')
+ call assert_fails('const F = funcref("s:noop")', 'E995:')
+ call assert_fails('const l = [1, 2, 3]', 'E995:')
+ call assert_fails('const d = {"foo": 10}', 'E995:')
+ if has('channel')
+ call assert_fails('const j = test_null_job()', 'E995:')
+ call assert_fails('const c = test_null_channel()', 'E995:')
+ endif
+ call assert_fails('const b = v:true', 'E995:')
+ call assert_fails('const n = v:null', 'E995:')
+ call assert_fails('const bl = 0zC0FFEE', 'E995:')
+ call assert_fails('const [i, f, s] = [1, 1.1, "vim"]', 'E995:')
+
+ const i2 = 1
+ const f2 = 1.1
+ const s2 = 'vim'
+ const F2 = funcref('s:noop')
+ const l2 = [1, 2, 3]
+ const d2 = {'foo': 10}
+ if has('channel')
+ const j2 = test_null_job()
+ const c2 = test_null_channel()
+ endif
+ const b2 = v:true
+ const n2 = v:null
+ const bl2 = 0zC0FFEE
+
+ call assert_fails('const i2 = 1', 'E995:')
+ call assert_fails('const f2 = 1.1', 'E995:')
+ call assert_fails('const s2 = "vim"', 'E995:')
+ call assert_fails('const F2 = funcref("s:noop")', 'E995:')
+ call assert_fails('const l2 = [1, 2, 3]', 'E995:')
+ call assert_fails('const d2 = {"foo": 10}', 'E995:')
+ if has('channel')
+ call assert_fails('const j2 = test_null_job()', 'E995:')
+ call assert_fails('const c2 = test_null_channel()', 'E995:')
+ endif
+ call assert_fails('const b2 = v:true', 'E995:')
+ call assert_fails('const n2 = v:null', 'E995:')
+ call assert_fails('const bl2 = 0zC0FFEE', 'E995:')
+ call assert_fails('const [i2, f2, s2] = [1, 1.1, "vim"]', 'E995:')
+endfunc
+
+func Test_const_with_condition()
+ const x = 0
+ if 0 | const x = 1 | endif
+ call assert_equal(0, x)
+endfunc
+
+func Test_lockvar()
+ let x = 'hello'
+ lockvar x
+ call assert_fails('let x = "there"', 'E741:')
+ if 0 | unlockvar x | endif
+ call assert_fails('let x = "there"', 'E741:')
+ unlockvar x
+ let x = 'there'
+
+ if 0 | lockvar x | endif
+ let x = 'again'
+
+ let val = [1, 2, 3]
+ lockvar 0 val
+ let val[0] = 9
+ call assert_equal([9, 2, 3], val)
+ call add(val, 4)
+ call assert_equal([9, 2, 3, 4], val)
+ call assert_fails('let val = [4, 5, 6]', 'E1122:')
+
+ let l =<< trim END
+ let d = {}
+ lockvar d
+ func d.fn()
+ return 1
+ endfunc
+ END
+ let @a = l->join("\n")
+ call assert_fails('exe @a', 'E741:')
+
+ let l =<< trim END
+ let d = {}
+ let d.fn = function("min")
+ lockvar d.fn
+ func! d.fn()
+ return 1
+ endfunc
+ END
+ let @a = l->join("\n")
+ call assert_fails('exe @a', 'E741:')
+endfunc
+
+func Test_const_with_index_access()
+ let l = [1, 2, 3]
+ call assert_fails('const l[0] = 4', 'E996:')
+ call assert_fails('const l[0:1] = [1, 2]', 'E996:')
+
+ let d = {'aaa': 0}
+ call assert_fails("const d['aaa'] = 4", 'E996:')
+ call assert_fails("const d.aaa = 4", 'E996:')
+endfunc
+
+func Test_const_with_compound_assign()
+ let i = 0
+ call assert_fails('const i += 4', 'E995:')
+ call assert_fails('const i -= 4', 'E995:')
+ call assert_fails('const i *= 4', 'E995:')
+ call assert_fails('const i /= 4', 'E995:')
+ call assert_fails('const i %= 4', 'E995:')
+
+ let s = 'a'
+ call assert_fails('const s .= "b"', 'E995:')
+
+ let [a, b, c] = [1, 2, 3]
+ call assert_fails('const [a, b, c] += [4, 5, 6]', 'E995:')
+
+ let [d; e] = [1, 2, 3]
+ call assert_fails('const [d; e] += [4, 5, 6]', 'E995:')
+endfunc
+
+func Test_const_with_special_variables()
+ call assert_fails('const $FOO = "hello"', 'E996:')
+ call assert_fails('const @a = "hello"', 'E996:')
+ call assert_fails('const &filetype = "vim"', 'E996:')
+ call assert_fails('const &l:filetype = "vim"', 'E996:')
+ call assert_fails('const &g:encoding = "utf-8"', 'E996:')
+
+ call assert_fails('const [a, $CONST_FOO] = [369, "abc"]', 'E996:')
+ call assert_equal(369, a)
+ call assert_equal(v:null, getenv("CONST_FOO"))
+
+ call assert_fails('const [b; $CONST_FOO] = [246, 2, "abc"]', 'E996:')
+ call assert_equal(246, b)
+ call assert_equal(v:null, getenv("CONST_FOO"))
+endfunc
+
+func Test_const_with_eval_name()
+ let s = 'foo'
+
+ " eval name with :const should work
+ const abc_{s} = 1
+ const {s}{s} = 1
+
+ let s2 = 'abc_foo'
+ call assert_fails('const {s2} = "bar"', 'E995:')
+endfunc
+
+func Test_lock_depth_is_2()
+ " Modify list - error when changing item or adding/removing items
+ const l = [1, 2, [3, 4]]
+ call assert_fails('let l[0] = 42', 'E741:')
+ call assert_fails('let l[2][0] = 42', 'E741:')
+ call assert_fails('call add(l, 4)', 'E741:')
+ call assert_fails('unlet l[1]', 'E741:')
+
+ " Modify blob - error when changing
+ const b = 0z001122
+ call assert_fails('let b[0] = 42', 'E741:')
+
+ " Modify dict - error when changing item or adding/removing items
+ const d = {'foo': 10}
+ call assert_fails("let d['foo'] = 'hello'", 'E741:')
+ call assert_fails("let d.foo = 'hello'", 'E741:')
+ call assert_fails("let d['bar'] = 'hello'", 'E741:')
+ call assert_fails("unlet d['foo']", 'E741:')
+
+ " Modifying list or dict item contents is OK.
+ let lvar = ['a', 'b']
+ let bvar = 0z1122
+ const l2 = [0, lvar, bvar]
+ let l2[1][0] = 'c'
+ let l2[2][1] = 0x33
+ call assert_equal([0, ['c', 'b'], 0z1133], l2)
+
+ const d2 = #{a: 0, b: lvar, c: 4}
+ let d2.b[1] = 'd'
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab
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