unikernel/duniverse/dune_/test/blackbox-tests/test-cases/melange/aliases.t

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+Test alias field on melange.emit stanzas
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.8)
+  > (using melange 0.1)
+  > EOF
+
+  $ cat > dune <<EOF
+  > (melange.emit
+  >  (target output)
+  >  (emit_stdlib false)
+  >  (alias app))
+  > EOF
+
+  $ cat > main.ml <<EOF
+  > let () =
+  >   Js.log "hello"
+  > EOF
+
+  $ dune build @app
+  $ node _build/default/output/main.js
+  hello
+
+Default alias melange works
+
+  $ cat > dune <<EOF
+  > (melange.emit
+  >  (target output)
+  >  (emit_stdlib false)
+  >  (modules main))
+  > (melange.emit
+  >  (target output2)
+  >  (emit_stdlib false)
+  >  (modules main2))
+  > EOF
+
+  $ cat > main2.ml <<EOF
+  > let () =
+  >   Js.log "hello"
+  > EOF
+
+  $ dune clean
+  $ dune build @melange
+  $ node _build/default/output/main.js
+  hello
+  $ node _build/default/output2/main2.js
+  hello
+
+Dune default alias works
+
+  $ cat > dune <<EOF
+  > (melange.emit
+  >  (target output)
+  >  (modules main)
+  >  (emit_stdlib false))
+  > (melange.emit
+  >  (target output2)
+  >  (modules main2)
+  >  (emit_stdlib false))
+  > EOF
+
+  $ cat > main2.ml <<EOF
+  > let () =
+  >   Js.log "hello"
+  > EOF
+
+  $ dune clean
+  $ dune build
+  $ node _build/default/output/main.js
+  hello
+  $ node _build/default/output2/main2.js
+  hello
+
+Users can override melange alias (even if useless)
+
+  $ cat > dune <<EOF
+  > (melange.emit
+  >  (target output)
+  >  (emit_stdlib false)
+  >  (alias melange))
+  > EOF
+
+  $ dune clean
+  $ dune build @melange
+
+If user defines an alias, the default alias is not used for that stanza
+
+  $ cat > dune <<EOF
+  > (melange.emit
+  >  (target output)
+  >  (emit_stdlib false)
+  >  (alias foo))
+  > EOF
+
+  $ dune clean
+  $ dune build @melange
+  Error: Alias "melange" specified on the command line is empty.
+  It is not defined in . or any of its descendants.
+  [1]
+
+Even if user defines an alias, dune default alias should still work
+
+  $ cat > dune <<EOF
+  > (melange.emit
+  >  (target output)
+  >  (modules main)
+  >  (emit_stdlib false)
+  >  (alias foo))
+  > EOF
+
+  $ dune clean
+  $ dune build
+  $ node _build/default/output/main.js
+  hello