Use @PostConstruct annotation to wired Environment variable

src/main/java/edu/udacity/java/nano/chat/WebSocketChatServer.java

@@ -8,7 +8,6 @@
 import javax.websocket.server.ServerEndpoint;
 import java.io.IOException;
 import java.util.HashSet;
-import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
@@ -29,7 +28,7 @@ public class WebSocketChatServer {
 
     /**
      * All chat sessions.
-     * Multiple Sessions are associated with a single a user to account for the case where a user logs in to chat room on multiple tabs
+     * Multiple Sessions are associated with a single user to account for the case where a user logs in to a chat room on multiple tabs
      */
     private static Map<String, Set<Session>> onlineSessions = new ConcurrentHashMap<>();
 

src/test/java/edu/udacity/java/nano/WebSocketChatServerTest.java

@@ -19,6 +19,7 @@
 import org.springframework.core.env.Environment;
 import org.springframework.test.context.junit4.SpringRunner;
 
+import javax.annotation.PostConstruct;
 import java.io.File;
 import java.util.List;
 
@@ -40,10 +41,14 @@ public class WebSocketChatServerTest {
 
     private WebDriver webDriver;
 
-    @Before
-    public void init() {
+    @PostConstruct
+    public void initUrls() {
         BASE_URL = environment.getProperty("app.base.url");
         CHAT_URL = environment.getProperty("app.chat.url");
+    }
+
+    @Before
+    public void init() {
         webDriver = initWebDriver();
     }