Runing test cases in all browser one after another - selenium-webdriver

Question

I want to run selenium webdriver test cases in all multiple browser but not in parallel.Is it possible to run test cases in all multiple browser without using xml and selenium grid.Can we do it by using annotation and java classes.I wanted that my test cases should execute in firefox first and after completion of execution in firefox it should start execution in chrome and so on.
I have tried this code to execute my test cases from one browser to another but not simultaneously.but it throw exceptions.
ManyBrowsers.java
import java.io.File;
import org.junit.rules.MethodRule;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.Statement;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class ManyBrowsers implements MethodRule {
public static WebDriver driver;
#Override
public Statement apply(final Statement base, FrameworkMethod method, Object target) {
return new Statement() {
#Override
public void evaluate() throws Throwable {
//RUN FIREFOX
driver = new FirefoxDriver();
base.evaluate();
driver.quit();
//RUN CHROME
File f = new File("D:\\SeleniumTestCases\\Selenium_Drivers\\chromedriver" ) ;//PATH to CHROME DRIVER
System.setProperty("webdriver.chrome.driver", f.getAbsolutePath());
driver = new ChromeDriver();
base.evaluate();
driver.quit();
}
};
}
}
Example Test
import java.util.concurrent.TimeUnit;
import org.junit.Rule;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import org.testng.annotations.AfterClass;
import com.thoughtworks.selenium.webdriven.commands.WaitForPageToLoad;
public class TestClass1 {
protected static WebDriver driver;
protected static String result;
#Rule
public ManyBrowsers browsers = new ManyBrowsers();
#BeforeClass
public static void setup() {
ManyBrowsers.driver.navigate().to("http://www.floraindia.com");
}
#Test
void Testcase1() {
System.out.println("Testcase1");
driver.findElement(By.id("kwsch")).sendKeys("Red");
driver.findElement(By.xpath("//input[#src='image/go.gif']")).click();
}
#Test
public void testGmail() throws Exception {
driver.get("http://www.gmail.com");
driver.findElement(By.id("Email")).clear();
driver.findElement(By.id("Email")).sendKeys("testemail");
driver.findElement(By.id("Passwd")).clear();
driver.findElement(By.id("Passwd")).sendKeys("123456");
driver.findElement(By.id("signIn")).click();
}
#AfterClass
public static void teardown() {
driver.close();
driver.quit();
}

Answer 1

Create different classes for the different tests in different browsers. For example:
First class:
public class FirefoxTest
{
WebDriver driver;
#BeforeClass
public void beforeClass() {
this.driver = new FirefoxDriver();
}
#Test
public void test() {
this.driver.get("http://google.com");
}
#AfterClass
public void afterClass() {
this.driver.quit();
}
}
Second class:
public class ChromeTest
{
WebDriver driver;
#BeforeClass
public void beforeClass() {
this.driver = new ChromeDriver();
}
#Test
public void test() {
this.driver.get("http://google.com");
}
#AfterClass
public void afterClass() {
this.driver.quit();
}
}
If you run your project as a TestNG Test, it will create your xml file programatically which will include all of the classes, so in this case you don't have to create it manually.

Answer 2

You get NullPointerException because method evaluate from class ManyBrowsers is invoked only before #Test methods.
You should use class ManyBrowsers only in methods with #Test annotation.