"Cannot instantiate class" error while executing tests through Selenium Java TestNG - java

I'm using Selenium and TestNG for the first time and I've been trying to search an element by its ID but I keep getting an "Cannot instantiate class" error. This is my code:
import org.testng.annotations.*;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.*;
public class NewTesting {
WebDriver driver = new FirefoxDriver();
#BeforeTest
public void setUp() {
driver.get("http://book.theautomatedtester.co.uk/chapter1");
}
#AfterTest
public void tearDown() {
driver.quit();
}
#Test
public void testExample() {
WebElement element = driver.findElement(By.id("verifybutton"));
}
}
Maybe I missed installing something? I installed the TestNG plug-in for eclipse and added the WebDriver JAR files, do I need to do more?
I tried following multiple tutorials but I keep getting errors, I hope someone can help. Thanks in advance!
EDIT:
I now have this:
public class NewTest {
private WebDriver driver;
#BeforeTest
public void setUp() {
System.setProperty("webdriver.gecko.driver","C:\\Program Files\\Selenium\\FirefoxDriver\\geckodriver.exe");
WebDriver driver = new FirefoxDriver();
driver.get("http://book.theautomatedtester.co.uk/chapter1");
}
#AfterTest
public void tearDown() {
driver.quit();
}
#Test
public void testExample() {
WebElement element = driver.findElement(By.id("verifybutton"));
}
}
It does open the website now but I'm getting a nullpointer exception now:
FAILED CONFIGURATION: #AfterTest tearDown
java.lang.NullPointerException
at NewTest.tearDown(NewTest.java:21)


Replace this set of imports:
import org.testng.annotations.*;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.*;
With:
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import org.testng.annotations.AfterTest;
Additionally, you have to download the required format of GeckoDriver executable from mozilla/geckodriver, extract the binary and then initialize the FirefoxDriver.
Your effective code block will be:
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import org.testng.annotations.AfterTest;
public class NewTesting {
WebDriver driver;
#BeforeTest
public void setUp() {
System.setProperty("webdriver.gecko.driver","C:\\path\\to\\geckodriver.exe");
driver = new FirefoxDriver();
driver.get("http://book.theautomatedtester.co.uk/chapter1");
}
#AfterTest
public void tearDown() {
driver.quit();
}
#Test
public void testExample() {
WebElement element = driver.findElement(By.id("verifybutton"));
}
}


If you're on windows, this previous question may be some help to you.
It mentions that you can download geckodriver, and then initialize your FirefoxDriver like this:
System.setProperty("webdriver.gecko.driver","G:\\Selenium\\Firefox driver\\geckodriver.exe");
WebDriver driver = new FirefoxDriver();

Related

Unable to run testng program

I am unable to run a testng program as it gives classpath error. I have already added testng libraries:
org.testng.TestNGException:
Cannot find class in classpath: testngBasic
package mobileAutomation;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
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WebDriver driver;
#BeforeMethod
public void setUP() {
System.setProperty("webdriver.chrome.driver", "C:\\drivers\\chromedriver.exe");
driver = new ChromeDriver();
driver.manage().window().maximize();
driver.manage().deleteAllCookies();
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driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.get("https://www.google.com");
}
#Test
public void getTitle() {
String googleTitle = driver.getTitle();
System.out.println(googleTitle);
}
#AfterMethod
public void closeBrowser() {
driver.quit();
}
}

Just do Eclipse > Project > Clean and then run the test cases again. It should work.

clear method not working with testng but working without it

.clear() in my test script is not working with testng version 6.14.2 but when i am running the same code without testng the clear method is working as expected.
i am running the code as mentioned below:
driver.findElement(By.id("email")).clear();
But this loc is not performing any action.
Blockquote

clear() is working for me. refer the following snippet
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
public class Testngexample {
private WebDriver driver;
#BeforeClass
public void setUp() {
System.setProperty("webdriver.chrome.driver","Add chromedriver path chromedriver.exe");
driver = new ChromeDriver();
}
#AfterClass
public void tearDown() {
driver.quit();
}
#Test
public void GoogleEarch() throws InterruptedException {
driver.get("https://www.google.com/");
driver.manage().window().maximize();
driver.findElement(By.name("q")).click();
driver.findElement(By.name("q")).sendKeys("testing");
Thread.sleep(5000);
driver.findElement(By.name("q")).clear();
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driver.close();
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}

NoSuchMethodError: org.openqa.selenium.remote.CommandInfo.<init>(Ljava/lang/String;Lorg/openqa/selenium/remote/HttpVerb;)V

i'm trying to run selendroid web for practice but i'm getting errors even i update selenium version (2.48.2) and set all paths correctly.
below is my code and i'm getting this error.
Please help me...
NoSuchMethodError: org.openqa.selenium.remote.CommandInfo.(Ljava/lang/String;Lorg/openqa/selenium/remote/HttpVerb;)V
package com.guru.test;
import io.selendroid.SelendroidCapabilities;
import io.selendroid.SelendroidDriver;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.Test;
public class testWeb {
public WebDriver driver;
#BeforeSuite
public void setUp() throws Exception
{
DesiredCapabilities caps = SelendroidCapabilities.android();
driver = new SelendroidDriver(caps);
}
#Test
public void WebSiteTest() throws Exception
{
driver.get("http://google.com");
WebElement searchQuery = driver.findElement(By.name("q"));
searchQuery.click();
searchQuery.sendKeys("Test");
WebElement submit = driver.findElement(By.name("btnG"));
submit.click();
}
#AfterSuite
public void tearDown() throws Exception{
driver.quit();
}
}

I think you have mixed up selenium and selendroid jars. selendroid-standalone + selendroid-client should be enough for this.

How to pass called WebDriver driver from #BeforeMethod to #Test in TestNG Webdriver Java

I have this class SignIn:
package automationFramework;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
import pageObject.devSplashScreenPage;
import utility.BrowserType;
import utility.Constant;
import appModule.SignIn_Action;
public class SignIn {
public WebDriver driver;
#BeforeMethod
#Parameters("browser")
public void SetUp(String browser) {
BrowserType.Execute(driver, browser);
}
#Test
public void signIn() {
// Call Sign In function
SignIn_Action.Execute(driver, Constant.StudentUsername, Constant.StudentPassword);
}
#AfterMethod
public void Teardown() {
driver.quit();
}
}
Where I am calling this code below which chooses the specific browser by the parameter that is passed. It works perfectly fine, it picks up the right browser and executes.
package utility;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
public class BrowserType {
#Test
public static void Execute(WebDriver driver, String browser) {
// Set Browsers
if(browser.equalsIgnoreCase("firefox")) {
driver = new FirefoxDriver();
}
else if (browser.equalsIgnoreCase("chrome")) {
{System.setProperty("webdriver.chrome.driver","C:/Users/elsid/Desktop/Eclipse/Selenium/chromedriver.exe");}
driver = new ChromeDriver();
}
else if (browser.equalsIgnoreCase("ie")) {
{System.setProperty("webdriver.ie.driver","C:/Users/elsid/Desktop/Eclipse/Selenium/IEDriverServer.exe");}
driver = new InternetExplorerDriver();
{DesiredCapabilities iecapabilities = DesiredCapabilities.internetExplorer();
iecapabilities.setCapability(InternetExplorerDriver.IE_ENSURE_CLEAN_SESSION, true);}
}
// Implicit Wait and Maximize browser
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.manage().window().maximize();
// Navigate to URL
driver.get(Constant.URL);
}
}
So everything executes perfectly fine in #BeforeMethod, the issue I have is the test stops because the driver doesn't pass from #BeforeMethod to #Test.
How can I get the driver that is initiated by running BrowserType.class into the #Test Sign_in.class. I guess how can i return the driver properly from browsertype and call it in Sign_in #Test.
Thanks

You should make your Execute function return the driver:
public static WebDriver Execute(String browser) {
...
return driver;
}
In your test:
public void SetUp(String browser) {
driver = BrowserType.Execute(browser);
}

Solved like this:
BrowserType.java:
package utility;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
public class BrowserType {
#Test
public static WebDriver Execute(String browser) {
// Set Browsers
WebDriver driver = null;
if(browser.equalsIgnoreCase("firefox")) {
driver = new FirefoxDriver();
}
else if (browser.equalsIgnoreCase("chrome")) {
{System.setProperty("webdriver.chrome.driver","C:/Users/elsid/Desktop/Eclipse/Selenium/chromedriver.exe");}
driver = new ChromeDriver();
}
else if (browser.equalsIgnoreCase("ie")) {
{System.setProperty("webdriver.ie.driver","C:/Users/elsid/Desktop/Eclipse/Selenium/IEDriverServer.exe");}
driver = new InternetExplorerDriver();
{DesiredCapabilities iecapabilities = DesiredCapabilities.internetExplorer();
iecapabilities.setCapability(InternetExplorerDriver.IE_ENSURE_CLEAN_SESSION, true);}
}
// Implicit Wait and Maximize browser
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.manage().window().maximize();
// Navigate to URL
driver.get(Constant.URL);
return driver;
}
SignIn.java class:
package automationFramework;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
import pageObject.devSplashScreenPage;
import utility.BrowserType;
import utility.Constant;
import appModule.SignIn_Action;
public class SignIn {
public WebDriver driver;
#BeforeMethod
#Parameters("browser")
public void SetUp(String browser) {
driver = BrowserType.Execute(browser);
}
#Test
public void signIn() {
// Call Sign In function
SignIn_Action.Execute(driver, Constant.StudentUsername, Constant.StudentPassword);
}
#AfterMethod
public void Teardown() {
driver.quit();
}
}

The way your doing things can be greatly improved.
public class BrowserTest extends TestBase{
#Test(dataProvider="test1")
public static void execute(WebDriverHelper helper, String browser) {
// Set Browsers
driver.get(url);
Just pass the driver object (coming from the DataProvider). I assume your generating the driver instance within the DataProvider method since your test method is already parameterized and takes the driver.
public class TestBase {
private WebDriver driver;
...
#BeforeMethod
#Parameters("browser")
public void setUp(Object[] params) {
driver = (WebDriverHelper)params.get(1);
browserName = (String)params.get(2);
this.setTestName( params.get(0) + "-" + browserName;
driver.navigateTo(startUrl);
}
This code I show above wont compile but what I am trying to convey here is that you need to use the optional TestNG arg to the #BeforeMethod method, which is Object[] , and it gives you access to objects passed to test methods, BEFORE the test method is called, such as getting access to a "driver helper" created in the DataProvider factory, and then doing some Capabilities setup on that before the test is ran.
#DataProvider(name = "test1")
public Object[][] createData1() {
return new Object[][] {
{ "Cedric", new WebDriverHelper(), "firefox" },
{ "Anne", new WebDriverHelper(), "chrome"}
};
}

public class TestSuiteDriver {
private static WebDriver driver;
#BeforeClass
public static void setUp(){
System.setProperty("webdriver.chrome.driver", "/Users/Kimberleyross/chromedriver");
driver = new ChromeDriver();
}
public static WebDriver getDriver() {
return TestSuiteDriver.driver;
}
}

Cannot get selenium webdriver Java script to run

Hi I'm new to webdriver I'm trying to get a script to run. When I run the script it opens the browser and enters the log in details but the #Test part does not. I've tried using css locator x path etc. but nothing I've tried works. Has anyone any ideas or advice that could help?
package firsttestngpackage;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
public class FirstTestNGFile {
public String baseUrl = "http://zzzz";
public WebDriver driver = new FirefoxDriver();
#BeforeTest
public void login() {
driver.get(baseUrl);
WebElement id = driver.findElement(By.id("z_username"));
id.sendKeys("todd");
WebElement pass = driver.findElement(By.id("z_password"));
pass.sendKeys("todd");
WebElement button = driver.findElement(By.name("login"));
button.submit();
}
#Test
public void createSub() {
driver.findElement(By.linkText("Customers")).click();
}
#AfterTest
public void terminateBrowser() {
driver.quit();
}
}

You were missing closing } and the selector for customers element may be the reason of failure as well
package firsttestngpackage;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
public class FirstTestNGFile {
public String baseUrl = "http://zzzz";
public WebDriver driver = new FirefoxDriver();
#BeforeTest
public void login() {
driver.get(baseUrl);
WebElement id = driver.findElement(By.id("z_username"));
id.sendKeys("todd");
WebElement pass = driver.findElement(By.id("z_password"));
pass.sendKeys("todd");
WebElement button = driver.findElement(By.name("login"));
button.submit();
}
#Test
public void createSub() {
driver.findElement(By.xpath("//*[.='Customers']")).click();
}
#AfterTest
public void terminateBrowser() {
driver.quit();
}
}

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