有没有办法模拟 Vimscript/VimL 函数?
Is there a way to mock Vimscript/VimL functions?
我很想知道是否有任何方法可以模拟 Vimscript 函数以进行测试。我知道有像 vader.vim 这样的框架,但没有提到模拟。
您可以使用 :function!
重新定义任何现有的用户函数。所以,例如,
function! Mock(name, Hook) abort
" save a reference to original function
let l:Orig = funcref(a:name)
" overwrite function
let l:text =<< trim EOF
function! %s(...) abort closure
let l:oldresult = call(l:Orig, a:000)
let l:newresult = call(a:Hook, [l:Orig, l:oldresult] + a:000)
return l:newresult isnot v:null ? l:newresult : l:oldresult
endfunction
EOF
execute printf(join(l:text, "\n"), a:name)
endfunction
" silly test
function! Test(p1, p2) abort
return a:p1 * a:p2
endfunction
function! MyHook(Orig, result, ...) abort
echo 'Calling' get(a:Orig, 'name') 'with params' a:000 'produced' a:result
" remember: default return value is zero, not v:null
return a:result * 2
endfunction
call Mock('Test', funcref('MyHook'))
echo Test(6, 7)
" Calling Test with params [6, 7] produced 42
" 84
我很想知道是否有任何方法可以模拟 Vimscript 函数以进行测试。我知道有像 vader.vim 这样的框架,但没有提到模拟。
您可以使用 :function!
重新定义任何现有的用户函数。所以,例如,
function! Mock(name, Hook) abort
" save a reference to original function
let l:Orig = funcref(a:name)
" overwrite function
let l:text =<< trim EOF
function! %s(...) abort closure
let l:oldresult = call(l:Orig, a:000)
let l:newresult = call(a:Hook, [l:Orig, l:oldresult] + a:000)
return l:newresult isnot v:null ? l:newresult : l:oldresult
endfunction
EOF
execute printf(join(l:text, "\n"), a:name)
endfunction
" silly test
function! Test(p1, p2) abort
return a:p1 * a:p2
endfunction
function! MyHook(Orig, result, ...) abort
echo 'Calling' get(a:Orig, 'name') 'with params' a:000 'produced' a:result
" remember: default return value is zero, not v:null
return a:result * 2
endfunction
call Mock('Test', funcref('MyHook'))
echo Test(6, 7)
" Calling Test with params [6, 7] produced 42
" 84