Close #1315 - Make the vint executable configurable

test/command_callback/test_vint_command_callback.vader

@@ -0,0 +1,39 @@
+Before:
+  Save g:ale_vim_vint_executable
+
+  unlet! g:ale_vim_vint_executable
+
+  runtime ale_linters/vim/vint.vim
+
+  let b:command_tail = (has('nvim') ? ' --enable-neovim' : '')
+  \ . ' -f "{file_path}:{line_number}:{column_number}: {severity}: {description} (see {reference})" %t'
+  call ale#semver#ResetVersionCache()
+
+After:
+  Restore
+
+  call ale#linter#Reset()
+  call ale#semver#ResetVersionCache()
+
+  unlet! b:bin_dir
+  unlet! b:executable
+
+Execute(The default command should be correct):
+  AssertEqual 'vint', ale_linters#vim#vint#GetExecutable(bufnr(''))
+  AssertEqual
+  \ ale#Escape('vint') .' --version',
+  \ ale_linters#vim#vint#VersionCommand(bufnr(''))
+  AssertEqual
+  \ ale#Escape('vint') .' -s --no-color' . b:command_tail,
+  \ ale_linters#vim#vint#GetCommand(bufnr(''), [])
+
+Execute(The executable should be configurable):
+  let g:ale_vim_vint_executable = 'foobar'
+
+  AssertEqual 'foobar', ale_linters#vim#vint#GetExecutable(bufnr(''))
+  AssertEqual
+  \ ale#Escape('foobar') .' --version',
+  \ ale_linters#vim#vint#VersionCommand(bufnr(''))
+  AssertEqual
+  \ ale#Escape('foobar') .' -s --no-color' . b:command_tail,
+  \ ale_linters#vim#vint#GetCommand(bufnr(''), [])