" Remove keys we're not interested in
function! PreprocessItem(item) abort
    let l:item = a:item

    if has_key(l:item, 'user_data')
        let l:user_data = json_decode(l:item['user_data'])
        unlet l:user_data['vim-lsp/insertStart']
        let l:item['user_data'] = json_encode(l:user_data)
    endif

    if l:item['user_data'] == '{}'
        unlet l:item['user_data']
    endif

    return l:item
endfunction

Describe lsp#omni
    Describe lsp#omni#get_vim_completion_item
        It should return item with proper kind
            let item = {
            \ 'label': 'my-label',
            \ 'documentation': 'my documentation.',
            \ 'detail': 'my-detail',
            \ 'kind': '3'
            \}

            let want = {
            \ 'word': 'my-label',
            \ 'abbr': 'my-label',
            \ 'info': 'my documentation.',
            \ 'icase': 1,
            \ 'dup': 1,
            \ 'empty': 1,
            \ 'kind': 'function',
            \ 'menu': 'my-detail'
            \}
            let got = lsp#omni#get_vim_completion_item(item)

            Assert Equals(PreprocessItem(got), want)
        End

        It should return result contained user_data['vim-lsp/textEdit'], if exist textEdit in item
            if !has('patch-8.0.1493')
                Skip This test requires 'patch-8.0.1493'
            endif

            let l:text_edit = {
            \    'range': {
            \      'start': {'line': 5, 'character': 0},
            \      'end': {'line': 5, 'character': 5}
            \    },
            \    'newText': 'yyy'
            \  }

            let item = {
            \ 'label': 'my-label',
            \ 'documentation': 'my documentation.',
            \ 'detail': 'my-detail',
            \ 'kind': '3',
            \ 'textEdit': l:text_edit
            \}

            let l:want_user_data = {
            \  'vim-lsp/textEdit': l:text_edit
            \}

            let l:want_user_data_string = json_encode(l:want_user_data)

            let want = {
            \ 'word': 'my-label',
            \ 'abbr': 'my-label',
            \ 'info': 'my documentation.',
            \ 'icase': 1,
            \ 'dup': 1,
            \ 'empty': 1,
            \ 'kind': 'function',
            \ 'menu': 'my-detail',
            \ 'user_data': l:want_user_data_string
            \}
            let got = lsp#omni#get_vim_completion_item(item)

            Assert Equals(PreprocessItem(got), want)
        End

        It should not add user_data, if provide textEdit property and textEdit value is null
            if !has('patch-8.0.1493')
                Skip This test requires 'patch-8.0.1493'
            endif

            let item = {
            \ 'label': 'my-label',
            \ 'documentation': 'my documentation.',
            \ 'detail': 'my-detail',
            \ 'kind': '3',
            \ 'textEdit': v:null
            \}

            let want = {
            \ 'word': 'my-label',
            \ 'abbr': 'my-label',
            \ 'info': 'my documentation.',
            \ 'icase': 1,
            \ 'dup': 1,
            \ 'empty': 1,
            \ 'kind': 'function',
            \ 'menu': 'my-detail',
            \}
            let got = lsp#omni#get_vim_completion_item(item)

            Assert Equals(PreprocessItem(got), want)
        End

        It should return item with newlines in 'menu' replaced
            let item = {
            \ 'label': 'my-label',
            \ 'documentation': 'my documentation.',
            \ 'detail': "my-detail\nmore-detail",
            \ 'kind': '3'
            \}

            let want = {
            \ 'word': 'my-label',
            \ 'abbr': 'my-label',
            \ 'info': 'my documentation.',
            \ 'icase': 1,
            \ 'dup': 1,
            \ 'empty': 1,
            \ 'kind': 'function',
            \ 'menu': 'my-detail more-detail'
            \}
            let got = lsp#omni#get_vim_completion_item(item)

            Assert Equals(PreprocessItem(got), want)
        End
    End
End