dev-ml/digestif: add subslot, impl testing

Signed-off-by: Thomas Bracht Laumann Jespersen <t@laumann.xyz>

dev-ml/digestif/digestif-1.3.0.ebuild

@@ -10,12 +10,27 @@ HOMEPAGE="https://github.com/mirage/digestif"
 SRC_URI="https://github.com/mirage/${PN}/archive/v${PV}.tar.gz -> ${P}.gh.tar.gz"
 
 LICENSE="MIT"
-SLOT="0"
+SLOT="0/${PV}"
 KEYWORDS="~amd64"
-IUSE="+ocamlopt"
+IUSE="+ocamlopt test"
+
+RESTRICT="!test? ( test )"
 
 RDEPEND="
 	>=dev-lang/ocaml-4.8:=[ocamlopt?]
 	dev-ml/eqaf:=[ocamlopt?]
 "
-DEPEND="${RDEPEND}"
+
+DEPEND="
+	${RDEPEND}
+	test? (
+		>=dev-ml/fmt-0.8.7:=[ocamlopt?]
+		dev-ml/alcotest:=[ocamlopt?]
+		dev-ml/bos
+		dev-ml/astring
+		dev-ml/fpath
+		dev-ml/rresult
+		dev-ml/findlib:=[ocamlopt?]
+		dev-ml/crowbar:=[ocamlopt?]
+	)
+"