browser.get("http://foo.html", function() {
   browser.title(function(err, title) {
     assert.ok(~title.indexOf('foo title'), 'Wrong title!');
     browser.elementById('i am a link', function(err, el) {
        browser.clickElement(el, function() {
           browser.eval("window.location.href", function(err, href) {
           assert.ok(~href.indexOf('foo title 2'));
           browser.quit();
           });
        });
     });
   });
});

driver.get("http://foo.html");
title = driver.getTitle();
link  = driver.findElement(By.id('i am a link'));
link.click();
assert(driver.getCurrentUrl().indexOf('foo title 2') > -1);
title.should.equal('foo title');
console.log(title);
driver.quit();

If you've used the Selenium API before, you won't have to learn a new API.