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

dot_vim/plugged/vimtex/test/test-get-main/test-standalone/a/a.tex

@@ -0,0 +1,6 @@
+\documentclass{standalone}
+\usepackage{standalone}
+\begin{document}
+A
+\input{a/b/b}
+\end{document}

dot_vim/plugged/vimtex/test/test-get-main/test-standalone/a/b/b.tex

@@ -0,0 +1,4 @@
+\documentclass{standalone}
+\begin{document}
+B
+\end{document}

dot_vim/plugged/vimtex/test/test-get-main/test-standalone/main.tex

@@ -0,0 +1,9 @@
+\documentclass{article}
+\usepackage[utf8]{inputenc}
+\usepackage{standalone}
+
+\begin{document}
+
+\input{a/a}
+
+\end{document}