java.lang.NullPointerException error while running test ng case - selenium

Question

I am trying to run this code with TestNG but all it gives me is java.lang.NullPointerException error. Firefox does get opened but after that error comes up. What's going wrong. Please help!
Also is it mandatory to run testNG with XML.
public class GuestCheckout
{
public WebDriver driver ;
public String baseURL = "http://www.google.com";
#BeforeTest
public void setBaseURL(){
WebDriver driver = new FirefoxDriver();
driver.get(baseURL);
}
#Test(priority = 0)
public void EmailPasswordEntry() {
// Entering Email and Password values
driver.findElement(By.id("loginRegister")).click();
WebElement email = driver.findElement(By.id("head_username"));
email.clear();
email.sendKeys("abcd#gmail.com");
WebElement password = driver.findElement(By.id("head_password"));
password.clear();
password.sendKeys("123456");
driver.findElement(By.name("loginsubmit")).click();
}
#Test(priority = 1)
void AssertionVerification() {
// Verifying "My Account" text after login
String bodyText = driver.findElement(By.xpath("//span[#id='loginHeader']/descendant::a[text()='My Account']")).getText();
Assert.assertTrue(bodyText.contains("My Accountii"), "Not matched");
}
}
Error:
--------
FAILED: EmailPasswordEntry
java.lang.NullPointerException
at package_1.GuestCheckout.EmailPasswordEntry(GuestCheckout.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at `enter code here`org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
at org.testng.TestNG.run(TestNG.java:1057)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
and same for the second Test method

Answer 1

Since you have instantiated WebDriver in local way and trying use that as a global instance so you are getting Null Pointer Exception. Do this in this way:
public WebDriver driver ;
public String baseURL = "http://www.ggolge.com";
#BeforeTest
public void setBaseURL(){
driver = new FirefoxDriver(); // Now this is a global instance for this class
driver.get(baseURL);
}
#Test(priority = 0)
public void EmailPasswordEntry() {
// Entering Email and Password values
driver.findElement(By.id("loginRegister")).click();
WebElement email = driver.findElement(By.id("head_username"));
email.clear();
email.sendKeys("abcd#gmail.com");
WebElement password = driver.findElement(By.id("head_password"));
password.clear();
password.sendKeys("123456");
driver.findElement(By.name("loginsubmit")).click();
}
#Test(priority = 1)
void AssertionVerification() {
// Verifying "My Account" text after login
String bodyText = driver.findElement(By.xpath("//span[#id='loginHeader']/descendant::a[text()='My Account']")).getText();
Assert.assertTrue(bodyText.contains("My Accountii"), "Not matched");
}
No it is not mandatory to run using TestNg xml, if you are using some intelligent IDE like Eclipse then you can run your tests without xml.
XMLs are beneficial when you have multiple classes to run all together as a suite.

Answer 2

since using webdriver... try using public static
public static webdriver driver
in each class files