Use mineunit for advtrains_*

.build.yml

@@ -5,7 +5,8 @@ packages:
 - minetest-server
 - unzip
 - wget
-- lua-busted
+- lua5.1
+- luarocks
 sources :
 - https://git.sr.ht/~gpcf/advtrains
 
@@ -28,13 +29,18 @@ tasks:
     curl https://lifomaps.de/advtrains-test/testworld.tar.gz -o ~/testworld.tar.gz
     cd .minetest/worlds/
     tar xf ../../testworld.tar.gz
+- install_mineunit : |
+    for i in {busted,luacov}; do
+        luarocks install --local --lua-version 5.1 $i >/dev/null
+    done
+    luarocks install --local --lua-version 5.1 --server=https://luarocks.org/dev mineunit
 - run_unit_tests : |
-    cd advtrains/advtrains
-    busted
-    cd ../advtrains_interlocking
-    busted
-    cd ../serialize_lib
-    busted
+    cd advtrains/serialize_lib
+    ~/.luarocks/bin/busted
+    for i in {advtrains,advtrains_interlocking}; do
+        cd ../$i
+        ~/.luarocks/bin/mineunit
+    done
 - activate_test_env: |
     cd advtrains
     git merge --no-commit origin/luaatcdebug