How to handle Select in Selenium

Example of using Select in Selenium 

public static void main(String[] args) throws InterruptedException {
WebDriver driver = new FirefoxDriver();
driver.get("https://www.mobikwik.com/");
driver.manage().window().maximize();
driver.findElement(By.xpath("//*[@id='mobile_number']")).sendKeys("9910979218");
driver.findElement(By.xpath("//*[@id='mobile_amount']")).sendKeys("10");
WebElement operator = driver.findElement(By.xpath("//*[@id='mobile_operator']"));
Select option = new Select(operator);
option.selectByVisibleText("Idea");
Thread.sleep(5000);
driver.close();
}

TestNG Error Codes

We write automation framework using TestNG and when we run it we get errors sometimes. So, it becomes important for us to know about error messages. 

I have put some of the error messages that we get when we go wrong and execute TestNG XML file:

1.If two tests are having the same name then we see below error

at org.testng.TestNG.checkTestNames(TestNG.java:981)

at org.testng.TestNG.sanityCheck(TestNG.java:970)

at org.testng.TestNG.run(TestNG.java:1002)

at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:109)

2.If the testname doesnot enclosed in double quotes("") then we get below error