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

dot_vim/plugged/vimtex/test/test-cache/test-wrapper.vim

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+set nocompatible
+let &rtp = '../..,' . &rtp
+filetype plugin on
+
+nnoremap q :qall!<cr>
+
+let g:vimtex_cache_root = '.'
+
+function! SlowFunc(argument) abort
+  sleep 100m
+  return a:argument + 100
+endfunction
+let SlowFuncWrapped = vimtex#cache#wrap(
+      \ function('SlowFunc'), 'test-wrapper', {'persistent': 0})
+
+" First call is slow
+let s:time = reltime()
+call assert_equal(101, SlowFuncWrapped(1))
+call assert_inrange(0.09, 0.11, reltimefloat(reltime(s:time)))
+
+" Second call is fast
+let s:time = reltime()
+call assert_equal(101, SlowFuncWrapped(1))
+call assert_inrange(0.0, 0.01, reltimefloat(reltime(s:time)))
+
+" We can also open the cache directly
+let s:cache = vimtex#cache#open('test-wrapper')
+call assert_true(s:cache.has(1))
+
+call vimtex#test#finished()