unikernel/duniverse/dune_/test/blackbox-tests/test-cases/alias-empty.t

@@ -0,0 +1,67 @@
+Testing the empty alias
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.17)
+  > EOF
+
+Building the empty alias does nothing
+  $ dune build @empty
+
+We should check that a user has not added anything to an empty alias:
+  $ cat > dune <<EOF
+  > (rule
+  >  (alias empty)
+  >  (action
+  >   (echo "I should not be added!")))
+  > EOF
+
+For versions prior to 3.20 this does not fail:
+  $ dune build @empty
+  I should not be added!
+
+Also creating an alias called empty is allowed prior to 3.20:
+  $ cat > dune <<EOF
+  > (alias
+  >  (name empty)
+  >  (deps foo))
+  > EOF
+  $ cat > foo
+
+  $ dune build @empty
+
+For versions 3.20 and after these should fail:
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.20)
+  > EOF
+
+  $ cat > dune <<EOF
+  > (rule
+  >  (alias empty)
+  >  (action
+  >   (echo "I should not be added!")))
+  > EOF
+
+  $ dune build @empty
+  File "dune", lines 1-4, characters 0-65:
+  1 | (rule
+  2 |  (alias empty)
+  3 |  (action
+  4 |   (echo "I should not be added!")))
+  Error: User-defined rules cannot be added to the 'empty' alias
+  [1]
+
+  $ cat > dune <<EOF
+  > (alias
+  >  (name empty)
+  >  (deps foo))
+  > EOF
+
+  $ dune build @empty
+  File "dune", lines 1-3, characters 0-33:
+  1 | (alias
+  2 |  (name empty)
+  3 |  (deps foo))
+  Error: User-defined rules cannot be added to the 'empty' alias
+  [1]
+