I broke up with neovim....vim is my best friend now

dot_vim/plugged/vimtex/test/test-parser-bib/test.vim

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+set nocompatible
+let &rtp = '../..,' . &rtp
+
+function! TestBackend(bibfile, backend) abort
+  let g:vimtex_parser_bib_backend = a:backend
+  return vimtex#parser#bib(a:bibfile)
+endfunction
+
+
+let s:parsed = TestBackend('test.bib', 'bibtex')
+call assert_equal(6, len(s:parsed))
+
+let s:parsed = TestBackend('test.bib', 'vim')
+call assert_equal(7, len(s:parsed))
+
+call vimtex#log#set_silent()
+let s:parsed = TestBackend('test.bib', 'badparser')
+call assert_equal(0, len(s:parsed))
+
+" let s:parsed = TestBackend('test.bib', 'bibparse')
+" call assert_equal(7, len(s:parsed))
+
+" let s:parsed = TestBackend('test.bib', 'bibtexparser')
+" call assert_equal(5, len(s:parsed))
+
+let s:bib = vimtex#kpsewhich#find('biblatex-examples.bib')
+if !empty(s:bib) && filereadable(s:bib)
+  let s:parsed = TestBackend(s:bib, 'bibtex')
+  call assert_equal(92, len(s:parsed))
+
+  let s:parsed = TestBackend(s:bib, 'vim')
+  call assert_equal(92, len(s:parsed))
+
+  " let s:parsed = TestBackend(s:bib, 'bibparse')
+  " call assert_equal(92, len(s:parsed))
+
+  " let s:parsed = TestBackend(s:bib, 'bibtexparser')
+  " call assert_equal(92, len(s:parsed))
+endif
+
+call vimtex#test#finished()