test(include_subdirs): show missing dependency on module group (ocaml#12463)

Signed-off-by: Antonio Nuno Monteiro <[email protected]>

Author: anmonteiro

test/blackbox-tests/test-cases/include-qualified/build-with-sandbox.t

@@ -26,3 +26,26 @@ Transitive deps file includes the alias module
   $ cat _build/default/lib/.foo.objs/foo__Bar.impl.all-deps
   foo__Sub
   foo__Sub__Hello
+
+  $ cat > lib/dune <<EOF
+  > (include_subdirs qualified)
+  > (library (name foo))
+  > EOF
+  $ cat > lib/bar.ml <<EOF
+  > let hello = Sub.Hello.hello ^ Sub.world
+  > EOF
+  $ cat > lib/sub/sub.ml <<EOF
+  > module Hello = Hello
+  > let world = "world"
+  > EOF
+  $ cat > lib/sub/hello.ml <<EOF
+  > let hello = "hello from sub"
+  > EOF
+
+  $ DUNE_SANDBOX=none dune build
+  $ DUNE_SANDBOX=symlink dune build
+  File "lib/bar.ml", line 1, characters 12-27:
+  1 | let hello = Sub.Hello.hello ^ Sub.world
+                  ^^^^^^^^^^^^^^^
+  Error: The module Sub.Hello is an alias for module Foo__Sub__.Hello, which is missing
+  [1]