chapterThree.java

@Test
@UseDataProvider("testForDataFailure")
public void testLoginFailure(String username, String password, String expected, String testName, string locatorId) {
    //try loggin in with username and password
    login(username,password);

    //get the text from the alert element 
    String actual = driver.findElement(By.id("alert")).getText();
    assertEquals(testName, expected, actual);
}

@Test
@UseDataProvider("testForDataSuccess")
public void testLoginSuccess(String username, String password, String expected, String testName, string locatorId) {
    //try loggin in with username and password
    login(username,password);

    //get the text from the alert element 
    String actual = driver.findElement(By.id("logged-user-name")).getText();
    assertEquals(testName, expected, actual);
}