Only test 'latest' in PRs

Because it's the only tag being built

hooks/test

@@ -2,14 +2,21 @@
 
 . hooks/common
 
-# test 'branches' and 'this' (i.e. pull request) builds
-if [ "${BUILD}" == "branches" ] \
-   || [ "${BUILD}" == "this" ] \
-   || [ "${DEBUG}" == "true" ]; then
-  echo "🐳🐳🐳 Testing"
-  VERSION=latest docker-compose run netbox ./manage.py test
-  VERSION=snapshot docker-compose run netbox ./manage.py test
+run_test() {
+  echo "🐳🐳🐳 Testing '${1}'"
+  VERSION="${1}" docker-compose run netbox ./manage.py test
   docker-compose down -v
+  echo "🐳🐳🐳 Done testing '${1}'"
+}
+
+# test on builds of 'branches'
+if [ "${BUILD}" == "branches" ] \
+   || [ "${DEBUG}" == "true" ]; then
+  run_test latest
+  run_test snapshot
+# test on bulds of 'this' (i.e. pull request)
+elif [ "${BUILD}" == "this" ]; then
+  run_test latest
 else
   echo "🐳🐳🐳 No tests are implemented for build '${BUILD}'."
 fi