add testing script

.gitignore

@@ -0,0 +1 @@
+/chord-node

test.bash

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -ex
+
+go build -o ./chord-node
+
+# Test create and join.
+./chord-node join -ip 127.0.0.1:3000 &
+FIRST=$!
+sleep 3
+
+./chord-node join -ip 127.0.0.1:3001 -c 127.0.0.1:3000 &
+SECOND=$!
+./chord-node join -ip 127.0.0.1:3002 -c 127.0.0.1:3000 &
+THIRD=$!
+
+sleep 5
+# Each node logs its predecessor and successors. At this point, we see the ring.
+kill $FIRST $SECOND $THIRD