Add tests for LSP responses

test/test_engine_lsp_response_handling.vader

@@ -244,6 +244,93 @@ Execute(tsserver errors should mark tsserver no longer active):
 
   AssertEqual [], g:ale_buffer_info[bufnr('')].active_linter_list
 
+Execute(LSP diagnostics responses should be handled correctly):
+  let b:ale_linters = ['eclipselsp']
+  runtime ale_linters/java/eclipselsp.vim
+  call ale#test#SetFilename('filename.java')
+  call ale#engine#InitBufferInfo(bufnr(''))
+  call ale#lsp_linter#SetLSPLinterMap({'1': 'eclipselsp'})
+
+  call ale#lsp_linter#HandleLSPResponse(1, {
+  \ 'jsonrpc':'2.0',
+  \ 'method':'textDocument/publishDiagnostics',
+  \ 'params': {
+  \     'uri':'file://' . g:dir . '/filename.java',
+  \     'diagnostics': [
+  \        {
+  \          'range': {
+  \             'start': {
+  \               'line': 0,
+  \               'character':0
+  \             },
+  \             'end': {
+  \               'line': 0,
+  \               'character':0
+  \             }
+  \          },
+  \          'severity': 2,
+  \          'code': "",
+  \          'source': 'Java',
+  \          'message': 'Missing JRE 1-8'
+  \       }
+  \     ]
+  \  }
+  \})
+
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 1,
+  \     'bufnr': 3,
+  \     'col': 1,
+  \     'pattern': '',
+  \     'valid': 1,
+  \     'vcol': 0,
+  \     'nr': -1,
+  \     'type': 'W',
+  \     'text': 'Missing JRE 1-8'
+  \    }
+  \ ],
+  \ ale#test#GetLoclistWithoutModule()
+
+Execute(LSP diagnostics responses on project root should not populate loclist):
+  let b:ale_linters = ['eclipselsp']
+  runtime ale_linters/java/eclipselsp.vim
+  call ale#test#SetFilename('filename.java')
+  call ale#engine#InitBufferInfo(bufnr(''))
+  call ale#lsp_linter#SetLSPLinterMap({'1': 'eclipselsp'})
+
+  call ale#lsp_linter#HandleLSPResponse(1, {
+  \ 'jsonrpc':'2.0',
+  \ 'method':'textDocument/publishDiagnostics',
+  \ 'params': {
+  \     'uri':'file://' . g:dir,
+  \     'diagnostics': [
+  \        {
+  \          'range': {
+  \             'start': {
+  \               'line': 0,
+  \               'character':0
+  \             },
+  \             'end': {
+  \               'line': 0,
+  \               'character':0
+  \             }
+  \          },
+  \          'severity': 2,
+  \          'code': "",
+  \          'source': 'Java',
+  \          'message': 'Missing JRE 1-8'
+  \       }
+  \     ]
+  \  }
+  \})
+
+  AssertEqual
+  \ [
+  \ ],
+  \ ale#test#GetLoclistWithoutModule()
+
 Execute(LSP errors should mark linters no longer active):
   let b:ale_linters = ['pyls']
   runtime ale_linters/python/pyls.vim