if 0.0-beta1 or 0.0-RC1, use WP_TEST_TAG=branches/0.0 and ARCHIVE_NAME is wordpress-0.0-beta1 or wordpress-0.0-RC1

Author: torounit

templates/install-wp-tests.sh

@@ -25,7 +25,11 @@ download() {
     fi
 }
 
-if [[ $WP_VERSION =~ ^[0-9]+\.[0-9]+$ ]]; then
+if [[ $WP_VERSION =~ ^[0-9]+\.[0-9]+\-(beta|RC)[0-9]+$ ]]; then
+	WP_BRANCH=${WP_VERSION%\-*}
+	WP_TESTS_TAG="branches/$WP_BRANCH"
+
+elif [[ $WP_VERSION =~ ^[0-9]+\.[0-9]+$ ]]; then
 	WP_TESTS_TAG="branches/$WP_VERSION"
 elif [[ $WP_VERSION =~ [0-9]+\.[0-9]+\.[0-9]+ ]]; then
 	if [[ $WP_VERSION =~ [0-9]+\.[0-9]+\.[0] ]]; then
@@ -47,7 +51,6 @@ else
 	fi
 	WP_TESTS_TAG="tags/$LATEST_VERSION"
 fi
-
 set -ex
 
 install_wp() {