gnu: ocaml5: Add ocaml-ounit2.

* gnu/packages/ocaml5.scm (ocaml-ounit2): New variable.

Change-Id: I388ae135c14c573516069b78ef3361f81fa5d657
Signed-off-by: Julien Lepiller <julien@lepiller.eu>

gnu/packages/ocaml5.scm

@@ -626,6 +626,27 @@ process.  Also, in many cases, Lwt threads can interact without the need for
 locks or other synchronization primitives.")
     (license license:lgpl2.1)))
 
+(define-public ocaml-ounit2
+  (package
+    (name "ocaml5-ounit2")
+    (version "2.2.6")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/gildor478/ounit.git")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "04c841hpk2yij370w30w3pis8nibnr28v74mpq2qz7z5gb8l07p1"))))
+    (build-system dune-build-system)
+    (propagated-inputs (list ocaml-lwt ocaml-stdlib-shims))
+    (home-page "https://github.com/gildor478/ounit")
+    (synopsis "Unit testing framework for OCaml")
+    (description "OUnit2 is a unit testing framework for OCaml.  It is similar
+to JUnit and other XUnit testing frameworks.")
+    (license license:expat)))
+
 (define-public ocaml5.3-dune-bootstrap
   (package
     (name "ocaml5.3-dune")