How to set log level in Selenium 2 WebDriver TestNg tests run through Ant

Question

I'm implementing a set of Selenium WebDriver tests in Java and I created the following ant build file that runs all the tests:

<project name="selenium" default="test" basedir=".">

 <path id="cp">
   <pathelement location="lib/testng-6.3.1.jar"/>
   <pathelement location="lib/jcommander-1.13.jar"/>
   <pathelement location="lib/bsh-1.3.0.jar"/>
   <pathelement location="lib/selenium-java-2.15.0.jar"/>
   <pathelement location="lib/selenium-server-standalone-2.14.0.jar"/>
   <pathelement location="bin"/>
 </path>

 <taskdef name="testng" classpathref="cp"
          classname="org.testng.TestNGAntTask" />

 <target name="test" depends="compile">
   <testng classpathref="cp" haltOnFailure="false">
     <classfileset dir="bin" includes="org/rnig/selenium/**/*Test.class"/>     
   </testng>
 </target>

 <target name="clean">
   <delete dir="bin" />
 </target>

 <target name="compile" depends="clean">
   <mkdir dir="bin" />
   <javac srcdir="src" destdir="bin" classpathref="cp" includeantruntime="no" />
 </target>

</project>

When I execute "ant test" in the command line everything works fine BUT I get a huge amount of logging messages in the screen:

(...)
   [testng] Dec 14, 2011 4:17:13 PM org.openqa.selenium.remote.RemoteWebDriver execute
   [testng] INFO: Executing: [1323679961495, executeScript {"script":"return (function() { return (function(){return function(){function f(a){throw a;}var i=void 0,j=null,l,n=this;\nfunction aa(a){var b=typeof a;if(b==\"object\")if(a){if(a instanceof Array)return\"array\";else if(a instanceof Object)return b;var c=Object.prototype.toString.call(a);if(c==\"[object Window]\")return\"object\";if(c==\"[object Array]\"||typeof a.length==\"number\"&&typeof a.splice!=\"undefined\"&&typeof a.propertyIsEnumerable!=\"undefined\"&&!a.propertyIsEnumerable(\"splice\"))return\"array\";if(c==\"[object Function]\"||typeof a.call!=\"undefined\"&&typeof a.propertyIsEnumerable!=\"undefined\"&&!a.propertyIsEnumerable(\"call\"))return\"function\"}else return\"null\";\nelse if(b==\"function\"&&typeof a.call==\"undefined\")return\"object\";return b}function o(a){return typeof a==\"string\"}function p(a){return aa(a)==\"function\"}function ba(a){a=aa(a);return a==\"object\"||a==\"array\"||a==\"function\"}var 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   [testng] Dec 14, 2011 4:17:13 PM org.openqa.selenium.remote.RemoteWebDriver execute
   [testng] INFO: Executing: [1323679961495, deleteAllCookies {}]
   [testng] Dec 14, 2011 4:17:13 PM org.openqa.selenium.remote.RemoteWebDriver execute
   [testng] INFO: Executing: [1323679961495, quit {}]

I assume the INFO messages come from the WebDriver library but I don't know how to change the log level. Any ideas?

BTW, I already tried:

LoggingPreferences logs = new LoggingPreferences();
logs.enable(LogType.DRIVER, Level.OFF);
DesiredCapabilities capabilities = DesiredCapabilities.firefox();
capabilities.setCapability(CapabilityType.LOGGING_PREFS, logs);
driver = new FirefoxDriver(capabilities);

and:

Logger logger = Logger.getLogger("");
logger.setLevel(Level.WARNING);

without luck, although with the latter INFO messages stop being printed in the Eclipse console.

UPDATE: Setting the standard java.util.logger logLevel to e.g. WARNING (as shown above) at the right place, in my case inside a @BeforeClass method, solved the issue.

Answer 1

What logging framework is used ? I would provide custom config file to it instead of setting it via API. I think java.util.logging is used, my choice would be jul--over-slf4j + slf4j-api + logback-classic, then set loggers and appenders in logback's config file.