fix(test): make sure required commands exists

Author: marjune163

test/main.bash

@@ -2,6 +2,14 @@
 
 cd $(dirname $0)
 
+for cmd in realpath curl; do
+	type "$cmd" &> /dev/null
+	if [ $? -ne 0 ]; then
+		echo "command '$cmd' not found" >&2
+		exit 1
+	fi
+done
+
 export root=$(realpath .)
 export fs=$(realpath fs)
 export cert=$(realpath cert)