unikernel/duniverse/dune_/test/blackbox-tests/test-cases/test-build-if/package.t

@@ -0,0 +1,42 @@
+build_if is compatible with package.
+
+This is important to test because in that case, (test) can not be split into two stanzas:
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.9)
+  > 
+  > (package (name a) (allow_empty))
+  > EOF
+
+  $ cat > dune << EOF
+  > (test
+  >  (name t)
+  >  (package a)
+  >  (build_if %{env:ENABLED=false}))
+  > EOF
+
+  $ touch t.ml
+
+  $ dune runtest
+
+If we try to split it we get an error:
+
+  $ cat > dune << EOF
+  > (executable
+  >  (name t)
+  >  (package a)
+  >  (enabled_if %{env:ENABLED=false}))
+  > 
+  > (rule
+  >  (alias runtest)
+  >  (action (run ./t.exe))
+  >  (package a)
+  >  (enabled_if %{env:ENABLED=false}))
+  > EOF
+
+  $ dune runtest
+  File "dune", line 3, characters 1-12:
+  3 |  (package a)
+       ^^^^^^^^^^^
+  Error: This field is useless without a (public_name ...) field.
+  [1]