test(melange): nested (include_subdirs qualififed)

Signed-off-by: Antonio Nuno Monteiro <anmonteiro@gmail.com>

Author: anmonteiro

test/blackbox-tests/test-cases/melange/melange-include-subdirs-qualified-nested.t

@@ -0,0 +1,41 @@
+Test `(include_subdirs qualified)` in the presence of invalid module name
+directories that don't contain source files
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.22)
+  > (using melange 1.0)
+  > EOF
+
+  $ mkdir -p a/b/c
+
+  $ cat > a/dune <<EOF
+  > (include_subdirs qualified)
+  > (library (name foo) (modes melange))
+  > EOF
+
+  $ cat > a/b/c/dune <<EOF
+  > (ocamllex lexer)
+  > EOF
+  $ cat > a/b/c/lexer.mll <<EOF
+  > {
+  > }
+  > rule lex = parse
+  >   | _   { true  }
+  >   | eof { false }
+  > EOF
+
+  $ cat > a/foo.ml <<EOF
+  > module L = B.C.Lexer
+  > EOF
+
+
+  $ dune build
+  $ find _build/default/a/.melange_src | sort
+  _build/default/a/.melange_src
+  _build/default/a/.melange_src/b
+  _build/default/a/.melange_src/b/c
+  _build/default/a/.melange_src/b/c/lexer.ml
+  _build/default/a/.melange_src/foo.ml
+  _build/default/a/.melange_src/foo__.ml-gen
+  _build/default/a/.melange_src/foo__B.ml-gen
+  _build/default/a/.melange_src/foo__B__C.ml-gen