Add a TestConfig method for setting the log level

This is a convenience method for easily setting the log level when
debugging. Due to a bug in gradle, it's also necessary to re-add the
ConsoleHandler so that messages are correctly logged to stderr.

Author: gcurtis

src/test/java/com/box/sdk/TestConfig.java

@@ -4,6 +4,10 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
+import java.util.logging.ConsoleHandler;
+import java.util.logging.Handler;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 final class TestConfig {
     private static Properties configProperties = null;
@@ -15,6 +19,26 @@ final class TestConfig {
 
     private TestConfig() { }
 
+    public static void setLogLevel(String levelString) {
+        Level level = Level.parse(levelString);
+        Logger logger = Logger.getLogger("com.box.sdk");
+        logger.setLevel(level);
+
+        boolean hasConsoleHandler = false;
+        for (Handler handler : logger.getHandlers()) {
+            handler.setLevel(level);
+            if (handler instanceof ConsoleHandler) {
+                hasConsoleHandler = true;
+            }
+        }
+
+        if (!hasConsoleHandler) {
+            Handler handler = new ConsoleHandler();
+            handler.setLevel(level);
+            logger.addHandler(handler);
+        }
+    }
+
     public static String getAccessToken() {
         if (accessToken == null || accessToken.equals("")) {
             accessToken = getProperty("accessToken");