unikernel/duniverse/dune_/test/blackbox-tests/test-cases/optional.t

@@ -0,0 +1,54 @@
+Various tests for optional libraries
+------------------------------------
+
+  $ cat >dune-project <<EOF
+  > (lang dune 1.2)
+  > (name foo)
+  > (package (name foo))
+  > EOF
+
+  $ cat >dune <<EOF
+  > (library
+  >  (name foo)
+  >  (public_name foo)
+  >  (wrapped false)
+  >  (optional)
+  >  (libraries lib_that_doesn't_exist))
+  > EOF
+
+  $ cat >x.ml <<EOF
+  > let x = 42
+  > EOF
+
+Regression test for non-wrapped optional libraries with missing
+dependencies (#1281):
+
+  $ dune build @install
+
+Interaction between `@all` and optional libraries:
+
+  $ dune build @all
+
+Reproduction case for a bug in dune < 2.4 where all libraries where
+considered as optional:
+
+  $ cat >dune <<EOF
+  > (library
+  >  (name foo)
+  >  (public_name foo)
+  >  (libraries lib_that_doesn't_exist))
+  > EOF
+
+The following command should fail because the executable is not optional:
+
+  $ dune build @install
+  File "dune", line 4, characters 12-34:
+  4 |  (libraries lib_that_doesn't_exist))
+                  ^^^^^^^^^^^^^^^^^^^^^^
+  Error: Library "lib_that_doesn't_exist" not found.
+  -> required by library "foo" in _build/default
+  -> required by _build/default/META.foo
+  -> required by _build/install/default/lib/foo/META
+  -> required by _build/default/foo.install
+  -> required by alias install
+  [1]