libdecaf: Add support for test

libdecaf/Makefile

@@ -12,7 +12,7 @@ LICENSE=	mit
 
 USE_CMAKE=	yes
 USE_LANGUAGES=	c99 c++11
-CMAKE_ARGS+=	-DENABLE_TESTS=NO
+CMAKE_ARGS+=	-DENABLE_TESTS=YES
 
 # These are required to prevent build breakage when tests are enabled
 # This is probably due to the auto-generated headers clobbering with
@@ -21,6 +21,11 @@ CFLAGS.NetBSD+=	-D_NETBSD_SOURCE
 
 PYTHON_FOR_BUILD_ONLY=		tool
 
+# XXX: Avoid to pick up possibe installed libdecaf.so
+TEST_ENV+=		LD_LIBRARY_PATH=${WRKSRC}/src
+
+TEST_TARGET=	test
+
 post-install:
 	${CHMOD} -x ${DESTDIR}${PREFIX}/lib/libdecaf.a