Prefix client identifiers with 'client:' if not already prefixed (#458)

Author: childish-sambino

src/main/java/com/twilio/type/Client.java

@@ -4,9 +4,15 @@
 
 public class Client implements Endpoint {
 
+    public static final String PREFIX = "client:";
+
     private final String client;
 
     public Client(String client) {
+        if (!client.toLowerCase().startsWith(PREFIX)) {
+            client = PREFIX + client;
+        }
+
         this.client = client;
     }
 

src/test/java/com/twilio/type/ClientTest.java

@@ -0,0 +1,15 @@
+package com.twilio.type;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ClientTest {
+
+    @Test
+    public void testGetEndpoint() {
+        Assert.assertEquals("client:me", new Client("me").getEndpoint());
+        Assert.assertEquals("client:YOU", new Client("YOU").getEndpoint());
+        Assert.assertEquals("CLIENT:HIM", new Client("CLIENT:HIM").getEndpoint());
+        Assert.assertEquals("cLiEnT:her", new Client("cLiEnT:her").getEndpoint());
+    }
+}