1func s:test_expand_dllpath(optname)
2  let $TEST_EXPAND_DLLPATH = '/dllpath/lib' . substitute(a:optname, '\zedll$', '.', '')
3  execute 'let dllpath_save = &' . a:optname
4  try
5    execute 'set ' . a:optname . '=$TEST_EXPAND_DLLPATH'
6    execute 'call assert_equal("' . $TEST_EXPAND_DLLPATH . '", &' . a:optname . ')'
7
8    execute 'set ' . a:optname . '=~' . $TEST_EXPAND_DLLPATH
9    execute 'call assert_equal("' . $HOME . $TEST_EXPAND_DLLPATH . '", &' . a:optname . ')'
10  finally
11    execute 'let &' . a:optname . ' = dllpath_save'
12    let $TEST_EXPAND_DLLPATH = ''
13  endtry
14endfunc
15
16func s:generate_test_if_exists(optname)
17  if exists('&' . a:optname)
18    execute join([
19          \ 'func Test_expand_' . a:optname . '()',
20          \ '  call s:test_expand_dllpath("' . a:optname . '")',
21          \ 'endfunc'
22          \ ], "\n")
23  endif
24endfunc
25
26call s:generate_test_if_exists('luadll')
27call s:generate_test_if_exists('perldll')
28call s:generate_test_if_exists('pythondll')
29call s:generate_test_if_exists('pythonthreedll')
30call s:generate_test_if_exists('rubydll')
31call s:generate_test_if_exists('tcldll')
32