Fix sign tests.

test/sign/test_linting_sets_signs.vader

@@ -1,39 +1,52 @@
-Given javascript (Some JavaScript with problems):
+Given foobar (Some imaginary filetype):
   var y = 3+3;
   var y = 3
 
 Before:
   sign unplace *
-  let g:actual_sign_list = []
-  let g:expected_sign_list = [
-  \ ['1', 'ALEWarningSign'],
-  \ ['2', 'ALEErrorSign'],
-  \]
 
-  function! g:CollectSigns()
+  function! TestCallback(buffer, output)
+    return [
+    \ {'lnum': 1, 'text': 'foo', 'type': 'W'},
+    \ {'lnum': 2, 'text': 'foo', 'type': 'E'},
+    \]
+  endfunction
+
+  function! CollectSigns()
     redir => l:output
        silent exec 'sign place'
     redir END
 
+    let l:actual_sign_list = []
+
     for l:line in split(l:output, "\n")
       let l:match = matchlist(l:line, 'line=\(\d\+\).*name=\(ALE[a-zA-Z]\+\)')
 
       if len(l:match) > 0
-        call add(g:actual_sign_list, [l:match[1], l:match[2]])
+        call add(l:actual_sign_list, [l:match[1], l:match[2]])
       endif
     endfor
+
+    return l:actual_sign_list
   endfunction
 
+  call ale#linter#Define('foobar', {
+  \ 'name': 'testlinter',
+  \ 'callback': 'TestCallback',
+  \ 'executable': 'echo',
+  \ 'command': 'echo foo bar',
+  \})
+
+
 After:
+  delfunction TestCallback
+  delfunction CollectSigns
+
   sign unplace *
   let g:ale_buffer_info = {}
-  delfunction g:CollectSigns
-  unlet g:actual_sign_list
-  unlet g:expected_sign_list
 
 Execute(The signs should be updated after linting is done):
   call ale#Lint()
   call ale#engine#WaitForJobs(2000)
-  call g:CollectSigns()
 
-  AssertEqual g:expected_sign_list, g:actual_sign_list
+  AssertEqual [['1', 'ALEWarningSign'], ['2', 'ALEErrorSign']], CollectSigns()

test/sign/test_sign_placement.vader

@@ -43,7 +43,7 @@ After:
   delfunction GenerateResults
   unlet! g:output
 
-Given testft(A Javscript file with warnings/errors):
+Given testft(A file with warnings/errors):
   foo
   bar
   baz