#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

test/test_history_saving.vader

@@ -35,9 +35,10 @@ Execute(History should be set when commands are run):
   let g:history = g:ale_buffer_info[bufnr('%')].history
 
   AssertEqual 1, len(g:history)
-  AssertEqual ['status', 'job_id', 'command'], keys(g:history[0])
+  AssertEqual sort(['status', 'exit_code', 'job_id', 'command']), sort(keys(g:history[0]))
   AssertEqual ['/bin/bash', '-c', 'echo command history test'], g:history[0].command
-  AssertEqual 'started', g:history[0].status
+  AssertEqual 'finished', g:history[0].status
+  AssertEqual 0, g:history[0].exit_code
   " The Job ID will change each time, but we can check the type.
   AssertEqual type(1), type(g:history[0].job_id)