Close #1559 - Report errors from LSP servers in :ALEInfo

test/lsp/test_lsp_error_parsing.vader

@@ -0,0 +1,65 @@
+Execute(Invalid responses should be handled):
+  AssertEqual '', ale#lsp#response#GetErrorMessage({})
+  AssertEqual '', ale#lsp#response#GetErrorMessage({'error': 0})
+  AssertEqual '', ale#lsp#response#GetErrorMessage({'error': {}})
+  AssertEqual '', ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': 0,
+  \   'message': 'x',
+  \ },
+  \})
+  AssertEqual '', ale#lsp#response#GetErrorMessage({'error': {'code': -32602}})
+  AssertEqual '', ale#lsp#response#GetErrorMessage({'error': {'code': -32603}})
+
+Execute(Messages without tracebacks should be handled):
+  AssertEqual 'xyz', ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': -32602,
+  \   'message': 'xyz',
+  \ },
+  \})
+  AssertEqual 'abc', ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': -32603,
+  \   'message': 'abc',
+  \ },
+  \})
+
+Execute(Invalid traceback data should be tolerated):
+  AssertEqual 'xyz', ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': -32602,
+  \   'message': 'xyz',
+  \   'data': {
+  \   },
+  \ },
+  \})
+  AssertEqual 'xyz', ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': -32602,
+  \   'message': 'xyz',
+  \   'data': {
+  \     'traceback': 0,
+  \   },
+  \ },
+  \})
+  AssertEqual 'xyz', ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': -32602,
+  \   'message': 'xyz',
+  \   'data': {
+  \     'traceback': [],
+  \   },
+  \ },
+  \})
+
+Execute(Messages with tracebacks should be handled):
+  AssertEqual "xyz\n123\n456", ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': -32602,
+  \   'message': 'xyz',
+  \   'data': {
+  \     'traceback': ['123', '456'],
+  \   },
+  \ },
+  \})

test/test_ale_info.vader

@@ -12,6 +12,12 @@ Before:
   Save g:ale_pattern_options_enabled
   Save g:ale_set_balloons
   Save g:ale_warn_about_trailing_whitespace
+  Save g:ale_sign_error
+  Save g:ale_sign_warning
+  Save g:ale_sign_info
+  Save g:ale_sign_style_error
+  Save g:ale_sign_style_warning
+  Save g:ale_lsp_error_messages
 
   unlet! b:ale_history
 
@@ -26,6 +32,12 @@ Before:
   let g:ale_pattern_options_enabled = 0
   let g:ale_set_balloons = 0
   let g:ale_warn_about_trailing_whitespace = 1
+  let g:ale_sign_error = '>>'
+  let g:ale_sign_warning = '--'
+  let g:ale_sign_info = '--'
+  let g:ale_sign_style_error = '>>'
+  let g:ale_sign_style_warning = '--'
+  let g:ale_lsp_error_messages = {}
 
   let g:testlinter1 = {'name': 'testlinter1', 'executable': 'testlinter1', 'command': 'testlinter1', 'callback': 'testCB1', 'output_stream': 'stdout'}
   let g:testlinter2 = {'name': 'testlinter2', 'executable': 'testlinter2', 'command': 'testlinter2', 'callback': 'testCB2', 'output_stream': 'stdout'}
@@ -469,3 +481,44 @@ Execute (The option for caching failing executable checks should work):
   \ '(executable check - success) ' . (has('win32') ? 'cmd' : 'echo'),
   \ '(executable check - failure) TheresNoWayThisIsExecutable',
   \])
+
+Given testft (Empty buffer):
+Execute (LSP errors for a linter should be outputted):
+  let g:ale_lsp_error_messages = {'testlinter1': ['foo', 'bar']}
+  call ale#linter#Define('testft', g:testlinter1)
+
+  call CheckInfo(
+  \ [
+  \   ' Current Filetype: testft',
+  \   'Available Linters: [''testlinter1'']',
+  \   '  Enabled Linters: [''testlinter1'']',
+  \   ' Linter Variables:',
+  \   '',
+  \ ]
+  \ + g:globals_lines
+  \ + [
+  \   ' LSP Error Messages:',
+  \   '',
+  \   '(Errors for testlinter1)',
+  \   'foo',
+  \   'bar',
+  \ ]
+  \ + g:command_header
+  \)
+
+Given testft (Empty buffer):
+Execute (LSP errors for other linters shouldn't appear):
+  let g:ale_lsp_error_messages = {'testlinter2': ['foo']}
+  call ale#linter#Define('testft', g:testlinter1)
+
+  call CheckInfo(
+  \ [
+  \   ' Current Filetype: testft',
+  \   'Available Linters: [''testlinter1'']',
+  \   '  Enabled Linters: [''testlinter1'']',
+  \   ' Linter Variables:',
+  \   '',
+  \ ]
+  \ + g:globals_lines
+  \ + g:command_header
+  \)

test/test_engine_lsp_response_handling.vader

@@ -1,5 +1,9 @@
 Before:
   Save g:ale_buffer_info
+  Save g:ale_lsp_error_messages
+
+  unlet! g:ale_lsp_error_messages
+
   call ale#test#SetDirectory('/testplugin/test')
 
 After:
@@ -7,6 +11,7 @@ After:
 
   call ale#test#RestoreDirectory()
   call ale#linter#Reset()
+  call ale#engine#ClearLSPData()
 
 Execute(tsserver syntax error responses should be handled correctly):
   runtime ale_linters/typescript/tsserver.vim
@@ -153,3 +158,20 @@ Execute(tsserver semantic error responses should be handled correctly):
   \ [
   \ ],
   \ getloclist(0)
+
+Execute(LSP errors should be logged in the history):
+  call ale#engine#SetLSPLinterMap({'347': 'foobar'})
+  call ale#engine#HandleLSPResponse(347, {
+  \ 'jsonrpc': '2.0',
+  \ 'error': {
+  \   'code': -32602,
+  \   'message': 'xyz',
+  \   'data': {
+  \     'traceback': ['123', '456'],
+  \   },
+  \ },
+  \})
+
+  AssertEqual
+  \ {'foobar': ["xyz\n123\n456"]},
+  \ get(g:, 'ale_lsp_error_messages', {})