1  Before:
 2    function! Func0()
 3    endfunction
 4    function! Func1(x)
 5    endfunction
 6    function! Func2(x,y)
 7    endfunction
 8    function! Func3(x,y,z)
 9    endfunction
10    function! Func3a(x,y,z,...)
11    endfunction
12  
13  After:
14    delfunction Func0
15    delfunction Func1
16    delfunction Func2
17    delfunction Func3
18    delfunction Func3a
19  
20  Execute(We should be able to compute the argument count for function names):
21    AssertEqual 0, ale#util#FunctionArgCount('Func0')
22    AssertEqual 1, ale#util#FunctionArgCount('Func1')
23    AssertEqual 2, ale#util#FunctionArgCount('Func2')
24    AssertEqual 3, ale#util#FunctionArgCount('Func3')
25    AssertEqual 3, ale#util#FunctionArgCount('Func3a')
26  
27  Execute(We should be able to compute the argument count for Funcrefs):
28    AssertEqual 0, ale#util#FunctionArgCount(function('Func0'))
29    AssertEqual 1, ale#util#FunctionArgCount(function('Func1'))
30    AssertEqual 2, ale#util#FunctionArgCount(function('Func2'))
31    AssertEqual 3, ale#util#FunctionArgCount(function('Func3'))
32    AssertEqual 3, ale#util#FunctionArgCount(function('Func3a'))
33  
34  Execute(We should be able to compute the argument count for lambdas):
35    if has('lambda')
36      AssertEqual 0, ale#util#FunctionArgCount({->1})
37      AssertEqual 1, ale#util#FunctionArgCount({x->1})
38      AssertEqual 2, ale#util#FunctionArgCount({x,y->1})
39      AssertEqual 3, ale#util#FunctionArgCount({x,y,z->1})
40      AssertEqual 3, ale#util#FunctionArgCount({x,y,z,...->1})
41    endif
42  
43  Execute(We should be able to compute the argument count autoload functions not yet loaded):
44    AssertEqual 1, ale#util#FunctionArgCount(function('ale#fixers#yapf#Fix'))
45    AssertEqual 1, ale#util#FunctionArgCount('ale#fixers#yapf#Fix')