assertNotNull(driver) should be relocated to another test

[gigena-git]

Inside the JUnit module tests, the WebDriverTest::tearDown method has the following code:

@After
public void tearDown() {
    assertNotNull(driver);
    driver.quit();
}

Putting assertNotNull(driver); inside a tearDown method is not efficient. If the purpose of that assertion is to know if the driver is not null, it is better to throw that exception in a separate test method than to throw it in an @After method.
This patch of code could be refactored to:

@Test
public void assertDriverNotNull(){
    assertNotNull(driver);
}

@After
public void tearDown() {
    if(driver != null){
        driver.quit();
    }
}