protected WebDriver driver;
protected boolean admin;
protected String browser;
protected String username;
protected String password;

@BeforeClass
protected void setUpClass(String browser, boolean admin) throws IOException, InterruptedException {
    this.admin = admin;
    driver = initLoginDriver(browser);
    if (admin) {
        this.username = prop.getProperty(get admin username);
        this.password = prop.getProperty(get admin username);
    } else {
        this.username = prop.getProperty(get non-admin username);
        this.password = prop.getProperty(get non-admin username);
    }
}

@AfterClass
protected void tearDownClass() {
    driver.quit();
}

private WebDriver initLoginDriver(String browser) throws IOException {
    prop = new Properties();
    FileInputStream fis = new FileInputStream("pathto/data.properties");
    prop.load(fis);

    WebDriver driver = null;

        switch (browser) {
            case "chrome":
                System.setProperty("webdriver.chrome.driver", "pathto/chromedriver");
                driver = new ChromeDriver();
                break;
            case "firefox":
                System.setProperty("webdriver.gecko.driver", "pathto/geckodriver");
                driver = new FirefoxDriver();
                break;
            case "IE":
                System.setProperty("webdriver.ie.driver", "pathto/MicrosoftWebDriver.exe");
                driver = new InternetExplorerDriver();
                break;
            default:
                System.setProperty("webdriver.chrome.driver", "pathto/chromedriver");
                driver = new ChromeDriver();
                break;
        }
    return driver;
}


@DataProvider(name = "dataProvider")
public static Object[][] dataProvider() {
    return new Object[][]{
        {"chrome", false},
        {"firefox", true}
    };
}

@AfterMethod
public void tearDownMethod() throws IOException, InterruptedException {
    driver.get(prop.getProperty("get-to-a-starting-page-url"));
}

@Factory(dataProvider = "dataProvider")
public Object[] createInstance(String browser, boolean headless, boolean internal) {
    return new Object[]{new LoginPageTest()};
}

@Test
public void testXYZ() throws IOException, InterruptedException {
    TestPageAObj pageA = new TestPageAObj(driver);
pageA.doOnething();
    TestPageBObj pageB = new TestPageBObj(driver);
pageA.doSecondThing();

}