test: Add expanders when running in travis

Hopefully this makes things more readable.

test/util.sh

@@ -28,3 +28,16 @@ function run-test()
 {
 	"$@" || failures=$( [ -n "$failures" ] && echo "$failures\\n$@" || echo "$@" )
 }
+
+# travis expander helpers from:
+# https://github.com/travis-ci/travis-rubies/blob/build/build.sh
+fold_start() {
+	if env | grep -q -e '^TRAVIS=true$'; then
+		echo -e "travis_fold:start:$1\033[33;1m$2\033[0m"
+	fi
+}
+fold_end() {
+	if env | grep -q -e '^TRAVIS=true$'; then
+		echo -e "\ntravis_fold:end:$1\r"
+	fi
+}