pArAs pArAs - 11 months ago 78
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 Source

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