pArAs pArAs - 1 month ago 15
Java Question

Getting Null Pointer Exception while running a test through TestNG

I am using CSV reader to fetch the data from and using this data in a test function using DataProvider.

TestNG Method


@Test(dataProvider = "regCSVData", dataProviderClass = LoginData.class)
public void testLoginUsingCSVFile(LoginData loginData){
driver.get(appURL);
Login login = PageFactory.initElements(driver, Login.class);
login.loginToFwbm(loginData);
}


LoginData Class


@DataProvider(name = "regCSVData")
public static Object[][] getCSVData() throws IOException {
CSVReader csvReader = new CSVReader(new FileReader(
LoginData.class.getResource("/regdata.csv").getPath()));
List<String[]>dataList = csvReader.readAll();
Object[][]data = new Object[dataList.size()][1];
List<LoginData> logList = new ArrayList<LoginData>();
for (String[] strArray:dataList){
LoginData loginData = new LoginData();
loginData.setUserName(strArray[0].trim());
loginData.setPassword(strArray[1].trim());
logList.add(loginData);
}
for (int i=0; i<data.length;i++){
for(int j=0;j<data[i].length;j++){
data[i][j] = logList.get(i);
}
}
csvReader.close();
return data;
}


CSV File



asdf, pa2
qwerty, pa2
john, pa2


When I run this test using TestNG, I am getting Null Pointer exception



java.lang.RuntimeException: java.lang.NullPointerException
at org.testng.internal.MethodInvocationHelper.invokeDataProvider(MethodInvocationHelper.java:161)
at org.testng.internal.Parameters.handleParameters(Parameters.java:429)
at org.testng.internal.Invoker.handleParameters(Invoker.java:1383)
at org.testng.internal.Invoker.createParameters(Invoker.java:1075)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1180)
at 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)
Caused by: java.lang.NullPointerException
at com.fwbm.dataobject.LoginData.getCSVData(LoginData.java:49)
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.MethodInvocationHelper.invokeDataProvider(MethodInvocationHelper.java:135)
... 20 more



Project Structure Image


enter image description here

Answer

You have to add the file to the classPath in your "run configuration". Then the file can be loaded using getRessource();