Getting "java.lang.NullPointerException" upon execution of selenium script

Question

Kindly can anyone help about the root cause of below exception.

Exception:

java.lang.NullPointerException at Test_Automation.TC_Invoice_Printing.TC_input_fields_validation(TC_Invoice_Printing.java:37) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124) at org.testng.internal.Invoker.invokeMethod(Invoker.java:580) at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:716) at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:988) at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109) at org.testng.TestRunner.privateRun(TestRunner.java:648) at org.testng.TestRunner.run(TestRunner.java:505) at org.testng.SuiteRunner.runTest(SuiteRunner.java:455) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415) at org.testng.SuiteRunner.run(SuiteRunner.java:364) at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84) at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208) at org.testng.TestNG.runSuitesLocally(TestNG.java:1137) at org.testng.TestNG.runSuites(TestNG.java:1049) at org.testng.TestNG.run(TestNG.java:1017) at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114) at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251) at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

Script:

@Test
public void TC_input_fields_validation() {

        int default_input_fields_count = Invoke_Test_Instance.driver.findElements(By.xpath("//input[contains(@class,'input-lg form-control')]")).size();
        System.out.println("default field count" + default_input_fields_count);
        System.out.println(Invoke_Test_Instance.driver.findElement(By.xpath("/html/body/div[1]/div/div[2]/div[2]/div/div[2]/div/form/div/div/div[2]/div/div/a")).isDisplayed());
        Invoke_Test_Instance.driver.findElement(By.xpath("/html/body/div[1]/div/div[2]/div[2]/div/div[2]/div/form/div/div/div[2]/div/div/a")).click();
        Invoke_Test_Instance.driver.findElement(By.xpath("/html/body/div[1]/div/div[2]/div[2]/div/div[2]/div/form/div/div/div[2]/div/div/a")).click();
        Invoke_Test_Instance.driver.findElement(By.xpath("/html/body/div[1]/div/div[2]/div[2]/div/div[2]/div/form/div/div/div[2]/div/div/a")).click();
}

driver is null. What is the code in Invoke_Test_Instance to initialize the driver variable? — Grasshopper
– Grasshopper, Commented Apr 26, 2018 at 8:04
Dear Grasshopper- thanks for your reply. Infact the issue got resolved by inserting method related to web driver initialisation within method defined under @BeforeClass — Ali
– Ali, Commented Apr 26, 2018 at 17:46
@Ali - Please add what worked for you as an answer to your question and please accept it, so that the question gets closed. — Krishnan Mahadevan
– Krishnan Mahadevan, Commented May 1, 2018 at 6:06

Ali · Accepted Answer · 2018-05-02 19:40:20Z

0

My issue got resolved by inserting method related to web driver initialisation within method defined under @BeforeClass

answered May 2, 2018 at 19:40

Ali

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