Before:
  function Range(start_line, start_char, end_line, end_char) abort
    return {
    \ 'start': {'line': a:start_line, 'character': a:start_char},
    \ 'end': {'line': a:end_line, 'character': a:end_char},
    \}
  endfunction

After:
  delfunction Range

Execute(ale#lsp#response#ReadDiagnostics() should handle errors):
  AssertEqual [
  \   {
  \     'type': 'E',
  \     'text': 'Something went wrong!',
  \     'lnum': 3,
  \     'col': 11,
  \     'end_lnum': 5,
  \     'end_col': 16,
  \     'code': 'some-error',
  \   }
  \ ],
  \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
  \   {
  \     'severity': 1,
  \     'range': Range(2, 10, 4, 15),
  \     'code': 'some-error',
  \     'message': 'Something went wrong!',
  \   },
  \ ]}})

Execute(ale#lsp#response#ReadDiagnostics() should handle warnings):
  AssertEqual [
  \   {
  \     'type': 'W',
  \     'text': 'Something went wrong!',
  \     'lnum': 2,
  \     'col': 4,
  \     'end_lnum': 2,
  \     'end_col': 4,
  \     'code': 'some-warning',
  \   }
  \ ],
  \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
  \   {
  \     'severity': 2,
  \     'range': Range(1, 3, 1, 3),
  \     'code': 'some-warning',
  \     'message': 'Something went wrong!',
  \   },
  \ ]}})

Execute(ale#lsp#response#ReadDiagnostics() should treat messages with missing severity as errors):
  AssertEqual [
  \   {
  \     'type': 'E',
  \     'text': 'Something went wrong!',
  \     'lnum': 3,
  \     'col': 11,
  \     'end_lnum': 5,
  \     'end_col': 16,
  \     'code': 'some-error',
  \   }
  \ ],
  \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
  \   {
  \     'range': Range(2, 10, 4, 15),
  \     'code': 'some-error',
  \     'message': 'Something went wrong!',
  \   },
  \ ]}})

Execute(ale#lsp#response#ReadDiagnostics() should handle messages without codes):
  AssertEqual [
  \   {
  \     'type': 'E',
  \     'text': 'Something went wrong!',
  \     'lnum': 3,
  \     'col': 11,
  \     'end_lnum': 5,
  \     'end_col': 16,
  \   }
  \ ],
  \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
  \   {
  \     'range': Range(2, 10, 4, 15),
  \     'message': 'Something went wrong!',
  \   },
  \ ]}})

Execute(ale#lsp#response#ReadDiagnostics() should consider -1 to be a meaningless code):
  AssertEqual [
  \   {
  \     'type': 'E',
  \     'text': 'Something went wrong!',
  \     'lnum': 3,
  \     'col': 11,
  \     'end_lnum': 5,
  \     'end_col': 16,
  \   }
  \ ],
  \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
  \   {
  \     'range': Range(2, 10, 4, 15),
  \     'message': 'Something went wrong!',
  \     'code': -1,
  \   },
  \ ]}})


Execute(ale#lsp#response#ReadDiagnostics() should handle multiple messages):
  AssertEqual [
  \   {
  \     'type': 'E',
  \     'text': 'Something went wrong!',
  \     'lnum': 1,
  \     'col': 3,
  \     'end_lnum': 1,
  \     'end_col': 3,
  \   },
  \   {
  \     'type': 'W',
  \     'text': 'A warning',
  \     'lnum': 2,
  \     'col': 5,
  \     'end_lnum': 2,
  \     'end_col': 5,
  \   },
  \ ],
  \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
  \   {
  \     'range': Range(0, 2, 0, 2),
  \     'message': 'Something went wrong!',
  \   },
  \   {
  \     'severity': 2,
  \     'range': Range(1, 4, 1, 4),
  \     'message': 'A warning',
  \   },
  \ ]}})

Execute(ale#lsp#response#ReadDiagnostics() should use relatedInformation for detail):
  AssertEqual [
  \   {
  \     'type': 'E',
  \     'text': 'Something went wrong!',
  \     'lnum': 1,
  \     'col': 3,
  \     'end_lnum': 1,
  \     'end_col': 3,
  \     'relatedInformation': [{
  \         'message': 'might be this',
  \         'location': {
  \             'uri': 'file:///tmp/someotherfile.txt',
  \             'range': {
  \                 'start': { 'line': 42, 'character': 79 },
  \                 'end': { 'line': 43, 'character': 80 },
  \             }
  \         }
  \     }]
  \   }
  \ ],
  \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
  \   {
  \     'range': Range(0, 2, 0, 2),
  \     'message': 'Something went wrong!',
  \     'detail': "Something went wrong!\n/tmp/someotherfile.txt:42:79:\n\tmight be this"
  \   }
  \ ]}})

Execute(ale#lsp#response#ReadTSServerDiagnostics() should handle tsserver responses):
  AssertEqual
  \ [
  \   {
  \     'type': 'E',
  \     'nr': 2365,
  \     'code': '2365',
  \     'text': 'Operator ''''+'''' cannot be applied to types ''''3'''' and ''''{}''''.',
  \     'lnum': 1,
  \     'col': 11,
  \     'end_lnum': 1,
  \     'end_col': 17,
  \   },
  \ ],
  \ ale#lsp#response#ReadTSServerDiagnostics({"seq":0,"type":"event","event":"semanticDiag","body":{"file":"/bar/foo.ts","diagnostics":[{"start":{"line":1,"offset":11},"end":{"line":1,"offset":17},"text":"Operator ''+'' cannot be applied to types ''3'' and ''{}''.","code":2365}]}})

Execute(ale#lsp#response#ReadTSServerDiagnostics() should handle warnings from tsserver):
  AssertEqual
  \ [
  \   {
  \     'lnum': 27,
  \     'col': 3,
  \     'nr': 2515,
  \     'code': '2515',
  \     'end_lnum': 27,
  \     'type': 'W',
  \     'end_col': 14,
  \     'text': 'Calls to ''console.log'' are not allowed. (no-console)',
  \   }
  \ ],
  \ ale#lsp#response#ReadTSServerDiagnostics({"seq":0,"type":"event","event":"semanticDiag","body":{"file":"<removed>","diagnostics":[{"start":{"line":27,"offset":3},"end":{"line":27,"offset":14},"text":"Calls to 'console.log' are not allowed. (no-console)","code":2515,"category":"warning","source":"tslint"}]}})

Execute(ale#lsp#response#ReadTSServerDiagnostics() should handle suggestions from tsserver):
  AssertEqual
  \ [
  \   {
  \     'lnum': 27,
  \     'col': 3,
  \     'nr': 2515,
  \     'code': '2515',
  \     'end_lnum': 27,
  \     'type': 'I',
  \     'end_col': 14,
  \     'text': 'Some info',
  \   }
  \ ],
  \ ale#lsp#response#ReadTSServerDiagnostics({"seq":0,"type":"event","event":"semanticDiag","body":{"file":"<removed>","diagnostics":[{"start":{"line":27,"offset":3},"end":{"line":27,"offset":14},"text":"Some info","code":2515,"category":"suggestion","source":"tslint"}]}})