Add test

Signed-off-by: Nicolás Ojeda Bär <n.oje.bar@gmail.com>

test/blackbox-tests/test-cases/deprecated-library-name/run.t

@@ -126,11 +126,13 @@ First the motivating case.
   > EOF
 
   $ cd d && dune build --root . @install
+
   $ find d/_build/install/default -name 'META' | sort
   d/_build/install/default/lib/dummy/META
   d/_build/install/default/lib/menhir/META
   d/_build/install/default/lib/menhirLib/META
   d/_build/install/default/lib/menhirSdk/META
+
   $ cat d/_build/install/default/lib/dummy/META
 
 
@@ -139,21 +141,23 @@ First the motivating case.
   $ cat d/_build/install/default/lib/menhirSdk/META
   requires = "menhir.sdk"
 
-
   $ find d/_build/install/default -name 'dune-package' | sort
   d/_build/install/default/lib/dummy/dune-package
   d/_build/install/default/lib/menhir/dune-package
   d/_build/install/default/lib/menhirLib/dune-package
   d/_build/install/default/lib/menhirSdk/dune-package
+
   $ cat d/_build/install/default/lib/dummy/dune-package
   (lang dune 2.0)
   (name dummy)
+
   $ cat d/_build/install/default/lib/menhirLib/dune-package
   (lang dune 2.0)
   (name menhirLib)
   (deprecated_library_name
    (old_public_name menhirLib)
    (new_public_name menhir.lib))
+
   $ cat d/_build/install/default/lib/menhirSdk/dune-package
   (lang dune 2.0)
   (name menhirSdk)
@@ -195,6 +199,7 @@ Checks that we can migrate top-level libraries across packages.
   > EOF
 
   $ cd d && dune build --root . @install
+
   $ cat d/_build/install/default/lib/top1/META
   requires = "q.bar"
 
@@ -213,6 +218,7 @@ old public name:
   > EOF
 
   $ cd d && dune build --root . @all
+
   $ cat d/_build/install/default/lib/top2/META
   requires = "q.top2"
 
@@ -284,16 +290,20 @@ Qualified, deprecated old_public_name:
   > EOF
 
   $ cd d && dune build --root . @all
+
   $ find d/_build/install/default -name 'META' | sort
   d/_build/install/default/lib/p/META
   d/_build/install/default/lib/q/META
+
   $ cat d/_build/install/default/lib/q/META
   package "foo" (
     requires = "p"
   )
+
   $ find d/_build/install/default -name 'dune-package' | sort
   d/_build/install/default/lib/p/dune-package
   d/_build/install/default/lib/q/dune-package
+
   $ cat d/_build/install/default/lib/q/dune-package
   (lang dune 2.0)
   (name q)
@@ -321,21 +331,65 @@ Two libraries redirecting to the same library:
   > EOF
 
   $ cd d && dune build --root . @all
+
   $ find d/_build/install/default -name 'META' | sort
   d/_build/install/default/lib/p/META
   d/_build/install/default/lib/q/META
+
   $ cat d/_build/install/default/lib/q/META
   package "bar" (
     requires = "p"
   )
   package "foo" (
     requires = "p"
   )
+
   $ find d/_build/install/default -name 'dune-package' | sort
   d/_build/install/default/lib/p/dune-package
   d/_build/install/default/lib/q/dune-package
+
   $ cat d/_build/install/default/lib/q/dune-package
   (lang dune 2.0)
   (name q)
   (deprecated_library_name (old_public_name q.bar) (new_public_name p))
   (deprecated_library_name (old_public_name q.foo) (new_public_name p))
+
+Check that we can use deprecated packages from within the same project and
+across projects.
+
+  $ mkdir -p d/p/a d/p/b
+
+  $ cat >d/p/a/dune-project <<EOF
+  > (lang dune 2.0)
+  > (package (name a) (deprecated_package_names aa))
+  > EOF
+
+  $ cat >d/p/b/dune-project <<EOF
+  > (lang dune 2.0)
+  > (package (name b))
+  > EOF
+
+  $ cat >d/p/a/dune <<EOF
+  > (rule (with-stdout-to empty1.ml (progn)))
+  > (rule (with-stdout-to empty2.ml (progn)))
+  > (deprecated_library_name
+  >  (old_public_name aa.foo)
+  >  (new_public_name a.p))
+  > (library
+  >  (name p)
+  >  (public_name a.p)
+  >  (modules empty1))
+  > (library
+  >  (name q)
+  >  (libraries aa.foo)
+  >  (modules empty2))
+  > EOF
+
+  $ cat >d/p/b/dune <<EOF
+  > (rule (with-stdout-to empty.ml (progn)))
+  > (library
+  >  (name b)
+  >  (libraries aa.foo))
+  > EOF
+
+  $ cd d/p && dune build --root . @all