unikernel/duniverse/dune_/test/blackbox-tests/test-cases/oxcaml/local.t

@@ -0,0 +1,48 @@
+The test ensures we are able to run OxCaml tests for Dune.
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.20)
+  > EOF
+
+  $ cat > main.ml << EOF
+  > let i @ local = 42
+  > EOF
+
+  $ cat > dune << EOF
+  > (executable
+  >  (name main))
+  > EOF
+
+The test fails with an OxCaml error to demonstrate it compiled the ml file with
+the correct compiler.
+  $ dune build ./main.exe
+  File "main.ml", line 1, characters 4-5:
+  1 | let i @ local = 42
+          ^
+  Error: This value is local, but expected to be global because it is inside a module.
+  [1]
+
+Demonstrate what happens when the extension isn't enabled:
+
+  $ cat >dune<<EOF
+  > (rule
+  >  (action (write-file foo bar))
+  >  (targets foo)
+  >  (enabled_if %{oxcaml_supported}))
+  > EOF
+
+  $ dune build ./foo
+  File "dune", line 4, characters 13-32:
+  4 |  (enabled_if %{oxcaml_supported}))
+                   ^^^^^^^^^^^^^^^^^^^
+  Error: Can't parse the variable oxcaml_supported without the oxcaml extension
+  Hint: Try enabling the extension with (using oxcaml <version>)
+  [1]
+
+Adding the extension to the dune-project removes the error
+
+  $ cat >> dune-project << EOF
+  > (using oxcaml 0.1)
+  > EOF
+
+  $ dune build ./foo