#254 Capture command exit codes in the history

test/test_ale_info.vader

@@ -191,3 +191,30 @@ Execute (ALEInfo should return command history):
   \   '(started) [''/bin/bash'', ''\c'', ''last command'']',
   \ ], "\n"),
   \ g:output
+
+Given testft.testft2 (Empty buffer with two filetypes):
+Execute (ALEInfo command history should print exit codes correctly):
+  let g:ale_buffer_info[bufnr('%')] = {
+  \ 'history': [
+  \   {'status': 'finished', 'exit_code': 0, 'job_id': 347, 'command': 'first command'},
+  \   {'status': 'finished', 'exit_code': 1, 'job_id': 347, 'command': ['/bin/bash', '\c', 'last command']},
+  \ ],
+  \}
+
+  call ale#linter#Define('testft', g:testlinter1)
+  call ale#linter#Define('testft2', g:testlinter2)
+  redir => g:output
+  silent ALEInfo
+  redir END
+  AssertEqual
+  \ join([
+  \   '',
+  \   ' Current Filetype: testft.testft2',
+  \   'Available Linters: [''testlinter1'', ''testlinter2'']',
+  \   '  Enabled Linters: [''testlinter1'', ''testlinter2'']',
+  \   ' Linter Variables:',
+  \   g:globals_string . g:command_header,
+  \   '(finished - exit code 0) ''first command''',
+  \   '(finished - exit code 1) [''/bin/bash'', ''\c'', ''last command'']',
+  \ ], "\n"),
+  \ g:output