Develop Reference

NullPointerException in POM Project

I have two pages, in one everything is fine, but in the other I get java.lang.NullPointerException
What is my mistake? Please help
LoginPage.java - all good
package page;
import Base.Base;;
import paths.LoginPath;
public class LoginPage extends Base {
LoginPath loginPath = new LoginPath();
public void ingresarPagina(){
chromeDriverConnection();
visit(loginPath.url);
maximize();
}
public void iniciarSesion(){
type("Qualityadmin", loginPath.txtUser);
type("pass1", loginPath.txtPass);
}
public void clickEnBoton(){
click(loginPath.btnLogin);
}
}
HomePage.java - I tried placing the chromeDriverConnection() again, but I get the same error
package page;
import Base.Base;
import paths.HomePath;
public class HomePage extends Base {
HomePath homePath = new HomePath();
public void mensajeExitoso() {
String mensaje = getText(homePath.txtMesajeExito);
System.out.println(mensaje);
}
}
Error
java.lang.NullPointerException
at Base.Base.getText(Base.java:35)
at page.HomePage.mensajeExitoso(HomePage.java:12)
at step.HomeStep.mensajeExitoso(HomeStep.java:10)
at stepdefinition.HomeStepDefinition.seMuestraUnMensajeDeExito(HomeStepDefinition.java:11)
at ✽.se muestra un mensaje de exito(file:///D:/Project/aer/features/src/test/resources/features/formulario.feature:22)
Process finished with exit code -1
Base.java - I don't think the error is in the Base class, but I put it anyway
Line 35: return driver.findElement (locator) .getText ();
When I put the mensajeExitoso() method in the LoginPage class everything goes fine
package Base;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
public class Base {
public WebDriver driver;
public Base(WebDriver driver){
this.driver = driver;
}
public Base() {
}
public WebDriver chromeDriverConnection() {
System.setProperty("webdriver.chrome.driver", "./src/test/resources/drivers/chromedriver.exe");
driver = new ChromeDriver();
return driver;
}
public WebElement findElement(By locator){
return driver.findElement(locator);
}
public String getText(WebElement element){
return element.getText();
}
public String getText(By locator){
return driver.findElement(locator).getText();
}
public void type(String inputText, By locator){
driver.findElement(locator).sendKeys(inputText);
}
public void iniciarSesion(String user, String pass){
}
public void click(By locator){
driver.findElement(locator).click();
}
Double num1 = 20.00;
String num2 = num1.toString();
public void visit(String url){
driver.get(url);
}
public void isDisplayed(By locator){
driver.findElement(locator).isDisplayed();
}
public void maximize(){
driver.manage().window().maximize();
}
}

You tried
chromeDriverConnection();
String mensaje = getText(homePath.txtMesajeExito);
System.out.println(mensaje);
right? and can you show me see homePath.txtMesajeExito

Call object.close() after running login script how ? function call inside test case

I am a selenium+testng tester in the making.
I have this codeigniter project.
i need to test the navigation.
What i have right now.
I have tested togin script for the site.
but here is the thing when i try to run the second script it goes to login again. I can't blame the developers. But the problem is how to login each time using selenium in test cases.
=======================FILE 1 CLASS: common ========================
package common;
/**
*
* #author Aruns
*/
public class common extends config {
public common() {
}
}
=====================FILE 2 CLASS:config ============================
==================== This is a config file ==========================
package common;
/**
*
* #author Aruns
*/
public class config {
private final String base_url = "http://localhost/hospitalnew";
private int timeout = 10;
private String browser = "chrome";
private final String chromeDriver = "C:\\xampp\\htdocs\\driver\\driver\\chromedriver.exe";
private final String geckoDriver = "C:\\xampp\\htdocs\\driver\\driver\\firefoxdriver.exe";
private final String ieDriver = "C:\\xampp\\htdocs\\driver\\driver\\operadriver.exe";
private String currentUrl = "";
private String currentTitle = "";
private String username = "arun-reception";
private String password = "arun";
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getCurrentUrl() {
return currentUrl;
}
public void setCurrentUrl(String currentUrl) {
this.currentUrl = currentUrl;
}
public String getCurrentTitle() {
return currentTitle;
}
/**
* sets current Title
*
* #param currentTitle = url
*/
public void setCurrentTitle(String currentTitle) {
this.currentTitle = currentTitle;
}
public String getChromeDriver() {
return chromeDriver;
}
public String getGeckoDriver() {
return geckoDriver;
}
public String getIeDriver() {
return ieDriver;
}
public String getBrowser() {
return browser;
}
public void setBrowser(String browser) {
this.browser = browser;
}
public String getBase_url() {
return base_url;
}
public int getTimeout() {
return timeout;
}
public void setTimeout(int timeout) {
this.timeout = timeout;
}
}
=======================FILE 3 CLASS:TestNavigationMenu===================
package critical;
import common.common;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import static org.testng.Assert.*;
import org.testng.annotations.AfterClass;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
/**
*
* #author Aruns
*/
public class TestNavigationMenu {
public TestNavigationMenu() {
}
// TODO add test methods here.
// The methods must be annotated with annotation #Test. For example:
//
// #Test
// public void hello() {}
WebDriver driver;
common common;
WebElement element;
#BeforeClass
public static void setUpClass() throws Exception {
}
#AfterClass
public static void tearDownClass() throws Exception {
}
#BeforeMethod
public void setUpMethod() throws Exception {
common = new common();
System.setProperty("webdriver.chrome.driver", common.getChromeDriver());
driver = new ChromeDriver();
driver.manage().timeouts().implicitlyWait(common.getTimeout(), TimeUnit.SECONDS);
}
#AfterMethod
public void tearDownMethod() throws Exception {
driver.close();
}
public void automatedlogin() throws Exception {
String title = "Hospital Software ";
String url = "http://localhost/hospitalnew/appointment/appointments";
TestNavigationMenu object = new TestNavigationMenu();
object.setUpMethod();
driver.navigate().to(url);
driver.manage().window().maximize();
driver.navigate().to("http://localhost/hospitalnew/login");
driver.manage().window().maximize();
element = driver.findElement(By.name("txtUserName__"));
element.sendKeys(common.getUsername());
element = driver.findElement(By.name("txtPass__"));
element.sendKeys(common.getPassword());
element = driver.findElement(By.name("submit"));
element.click();
}
#Test(priority = 1)
public void login() throws Exception {
String title = "Hospital Software ";
String url = "http://localhost/hospitalnew/appointment/appointments";
TestNavigationMenu object = new TestNavigationMenu();
object.setUpMethod();
driver.navigate().to(url);
driver.manage().window().maximize();
driver.navigate().to("http://localhost/hospitalnew/login");
driver.manage().window().maximize();
element = driver.findElement(By.name("txtUserName__"));
element.sendKeys(common.getUsername());
element = driver.findElement(By.name("txtPass__"));
element.sendKeys(common.getPassword());
element = driver.findElement(By.name("submit"));
element.click();
if (driver.getTitle().equals(title)) {
assertTrue(driver.getCurrentUrl().equals(url));
}
object.tearDownMethod();
}
// test case 3
#Test(priority = 2)
public void isWorkingMastersDepartment() throws Exception {
String title = "Hospital Software Department";
String url = "http://localhost/hospitalnew/department/page";
automatedlogin();
driver.navigate().to(url);
driver.manage().window().maximize();
element = driver.findElement(By.className("dropdown-toggle"));
element.click();
element = driver.findElement(By.className("dropdown-toggle"));
element.click();
if (driver.getTitle().equals(title)) {
assertTrue(driver.getCurrentUrl().equals(url));
}
}
}
i though of making a function(automatic login) then calling it each time. But the problem is.
Chrome is ram intensive. opening lots of windows and not closing might cause problem in the long run. how to call object.close() for each run of testng+selenium test cases?
Secondly, i though of extending common to contain login script. But i don't know whether it will work properly.Please point me out.To the right direction.
And please grade my code if it was good for reading and optimised!
Thanks ~
Arun

Selenium Automation - Cucumber and JUnit - No public static parameters method

Hi community: Trying to integrate Cucumber with JUnit, I have the next class.
import cl.cukes.ParameterizedRunnerFactory;
import cl.test.AutomatedWebTest;
import cl.util.report.Report;
import cucumber.annotation.en.Given;
import cucumber.annotation.en.Then;
import cucumber.annotation.en.When;
import cucumber.api.junit.Cucumber;
import org.junit.runner.RunWith;
import org.junit.runner.Runner;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.UseParametersRunnerFactory;
import org.junit.runners.model.InitializationError;
import org.junit.runners.parameterized.TestWithParameters;
import org.openqa.selenium.By;
import org.openqa.selenium.ie.InternetExplorerDriver;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
//JAVA
#RunWith(Parameterized.class)
#UseParametersRunnerFactory(ParameterizedRunnerFactory.class)
public class CucumberStepDefs extends AutomatedWebTest {
#Parameterized.Parameter(value = 0)
public String user;
#Parameterized.Parameter(value = 1)
public String pass;
public static class CucumberRunnerFactor extends ParameterizedRunnerFactory {
public Runner createRunnerForTestWithParameters(TestWithParameters test)
throws InitializationError {
try {
return new Cucumber(test.getTestClass().getJavaClass());
} catch (IOException e) {
throw new InitializationError(e);
}
}
}
#Given("^Enter to the QA URL environment")
public void Login() throws Exception {
baseUrl = "http://www.miprivado.cl/";
driver = new InternetExplorerDriver();
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
driver.get(baseUrl + "ucachaca/test.htm");
driver.switchTo().defaultContent();
driver.switchTo().frame("frmbody");
}
#When("^Fields Username y Passwordare displayed so enter parameters$")
public void UsuarioPass() throws Exception {
driver.findElement(By.id("TxbTELLUSERID")).clear();
driver.findElement(By.id("TxbTELLUSERID")).sendKeys(user);
driver.findElement(By.id("TxbUSERPASSW")).clear();
driver.findElement(By.id("TxbUSERPASSW")).sendKeys(pass);
screenshot.take(this, driver, "LoginR C01");
driver.findElement(By.id("BtnSubmit")).click();
driver.switchTo().defaultContent();
driver.switchTo().frame("frmwebteller");
driver.manage().window().maximize();
}
#Then("^User gets into the system and do Logout Logout$")
public void Logout() throws Exception {
screenshot.take (this, driver, "LoginR C02");
driver.switchTo ().defaultContent ();
driver.switchTo ().frame ("frmbody").switchTo ().frame ("menu");
driver.findElement(By.cssSelector("b")).click();
screenshot.take (this, driver, "LoginR C03");
driver.findElement(By.linkText("Log Off")).click();
screenshot.take (this, driver, "LoginR C04");
driver.quit();
}
}
The ParameterizedRunnerFactory is the next:
import org.junit.runner.Runner;
import org.junit.runners.model.InitializationError;
import org.junit.runners.parameterized.ParametersRunnerFactory;
import org.junit.runners.parameterized.TestWithParameters;
/**
*
*/
public class ParameterizedRunnerFactory implements ParametersRunnerFactory {
#Override
public Runner createRunnerForTestWithParameters(TestWithParameters test) throws InitializationError {
return new ParameterizedRunner(test);
}
}
The parameterized Runner class is the next:
import org.junit.After;
import org.junit.Before;
import org.junit.runners.model.*;
import org.junit.runners.parameterized.BlockJUnit4ClassRunnerWithParameters;
import org.junit.runners.parameterized.TestWithParameters;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
public class ParameterizedRunner extends BlockJUnit4ClassRunnerWithParameters {
public ParameterizedRunner(TestWithParameters test) throws InitializationError {
super(test);
}
// workaround for: https://github.com/junit-team/junit/issues/1046
private static final ConcurrentHashMap<Class<?>, TestClass> testClasses = new ConcurrentHashMap<>();
#Override
protected TestClass createTestClass(Class<?> clazz) {
TestClass testClass = testClasses.get(clazz);
if (testClass == null) {
testClasses.put(clazz, testClass = new TestClass(clazz));
}
return testClass;
}
// playing whack-a-mole with new TLAB allocations by re-defining with{Befores,Afters}...
#Override
protected Statement withBefores(FrameworkMethod method, Object target, Statement statement) {
List<FrameworkMethod> list = getTestClass().getAnnotatedMethods(Before.class);
if (list.isEmpty()) {
return statement;
}
return new BeforesStatement(target, statement, list);
}
#Override
protected Statement withAfters(FrameworkMethod method, Object target, Statement statement) {
List<FrameworkMethod> list = getTestClass().getAnnotatedMethods(After.class);
if (list.isEmpty()) {
return statement;
}
return new AftersStatement(target, statement, list);
}
private static final class BeforesStatement extends Statement {
private static final Object[] EMPTY_ARGS = new Object[0];
private final Object target;
private final Statement statement;
private final List<FrameworkMethod> list;
BeforesStatement(Object target, Statement statement, List<FrameworkMethod> list) {
this.target = target;
this.statement = statement;
this.list = list;
}
#Override
public void evaluate() throws Throwable {
// (1) Avoid ImmutableCollections#iterator()
for (int i = 0, size = list.size(); i < size; ++i) {
list.get(i).invokeExplosively(target, EMPTY_ARGS);
}
statement.evaluate();
}
}
private static final class AftersStatement extends Statement {
private static final Object[] EMPTY_ARGS = new Object[0];
private final Object target;
private final Statement statement;
private final List<FrameworkMethod> list;
AftersStatement(Object target, Statement statement, List<FrameworkMethod> list) {
this.target = target;
this.statement = statement;
this.list = list;
}
#Override
public void evaluate() throws Throwable {
// (2) Lazily create ArrayList
ArrayList<Throwable> throwables = null;
try {
statement.evaluate();
} catch (Throwable e) {
throwables = new ArrayList<Throwable>();
throwables.add(e);
} finally {
for (int i = 0, size = list.size(); i < size; ++i) {
try {
list.get(i).invokeExplosively(target, EMPTY_ARGS);
} catch (Throwable e) {
if (throwables == null) {
throwables = new ArrayList<Throwable>();
}
throwables.add(e);
}
}
}
if (throwables != null) {
MultipleFailureException.assertEmpty(throwables);
}
}
}
}
The Cucumber Runner Test class is the next:
import cucumber.api.CucumberOptions;
import cucumber.api.junit.Cucumber;
import org.junit.runner.RunWith;
#RunWith(Cucumber.class)
#CucumberOptions(features={"//src/features/Login.feature"}
,format = {"pretty", "html:target/cucumber"}
,glue = {"cucumber.CucumberStepDefs"}
)
/*#Suite.SuiteClasses({
CucumberStepDefs.class,
})*/
public class CucumberRunnerTest {
}
When I run my CucumberStepDefs, it displays the next issue on IntelliJ:
java.lang.Exception: No public static parameters method on class cl.cucumber.CucumberStepDefs
All the classes don't show error, but I'm not able to run this class.
Could anybody help me with this?

Don't try to mix JUnit with Maven:
The best answer were done by Grasshopper:
1.- Create the Feature file.
2.- Use Scenario Outline and put the data in Examples section.
3.- Use a runner like next:
#CucumberOptions(features = {"src/test/resource/features"},
glue={"stepdefs"},
monochrome = true,
tags = {"~#Ignore"},
plugin = {"pretty","html:target/cucumber-reports/cucumber-pretty",
"json:target/cucumber-reports/CucumberTestReport.json",
"rerun:target/cucumber-reports/rerun.txt",
"usage:target/cucumber-usage.json"}
)
public class TestRunner extends ExtendedTestNGRunner{
private TestNGCucumberRunner testNGCucumberRunner;
#BeforeClass(alwaysRun = true)
public void setUpClass() throws Exception {
testNGCucumberRunner = new TestNGCucumberRunner(this.getClass());
}
#Test(groups = "cucumber", description = "Runs Cucumber Feature", dataProvider = "features")
public void feature(CucumberFeatureWrapper cucumberFeature) {
testNGCucumberRunner.runCucumber(cucumberFeature.getCucumberFeature());
}
#DataProvider
public Object[][] features() {
return testNGCucumberRunner.provideFeatures();
}
#AfterClass(alwaysRun = true)
public void tearDownClass() throws Exception {
testNGCucumberRunner.finish();
}
}
And run the Feature.
Thanks a lot, Grasshopper!!!

How to Separate tests and functions in TestNG

I am new to TestNG Selenium Webdriver,
I want to separate Tests in different classes how to do that, and I am not able to understand the parameters to pass against each tests from the actual.
Here is my code
package Examples;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.testng.annotations.BeforeClass;
import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.Point;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.interactions.Actions;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.annotations.AfterClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
public class Flipkart {
public static WebDriver driver;
#BeforeClass
public void beforeClass()
{
driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(30000, TimeUnit.MILLISECONDS);
}
#Test
public void FlipkartTest() throws InterruptedException
{
driver.get("https://www.flipkart.com/");
driver.manage().window().maximize();
navback();
ArrayList<String> arrayList1 = new ArrayList<String>();
arrayList1.add("Samsung");
arrayList1.add("Nokia");
arrayList1.add("Micromax");
arrayList1.add("Sony");
arrayList1.add("Brands");
arrayList1.add("Android");
arrayList1.add("Windows");
for(int i=0; i<arrayList1.size(); i++)
{
String xpath = "//*[contains(#href,'%s')]";
String y = arrayList1.get(i);
String xpathOfElement = String.format(xpath, String.valueOf(y));
System.out.println("Name 1 "+driver.findElement(By.xpath(xpathOfElement)).getText());
driver.findElement(By.xpath(xpathOfElement)).click();
System.out.println("Count 1: "+driver.findElement(By.xpath("//*[#id='searchCount']")).getText());
ArrayList<String> arrayList = new ArrayList<String>();
arrayList.add("price_range");
arrayList.add("type");
arrayList.add("screen_size");
arrayList.add("features");
arrayList.add("primary_camera");
for(int j=0; j<arrayList.size(); j++)
{
String x = arrayList.get(j);
WebElement ul = driver.findElement(By.id(x));
List<WebElement> lis = ul.findElements(By.tagName("li"));
for (WebElement li : lis)
{
System.out.print(" 1st part: "+li.getAttribute("title")); //To get "Rs. 2001 - Rs. 5000"
System.out.println(" 2nd part: "+li.findElement(By.xpath(".//span[#class='count']")).getText());
}
System.out.println("");
}
navback();
}
}
public void navback()
{
WebElement we = driver.findElement(By.xpath("//*[contains(#data-key,'electronics')]"));
Actions action = new Actions(driver);
action.moveToElement(we).build().perform();
}
#AfterClass
public void tear()
{
// driver.quit();
}
}
I want the tests to be like
FlipkartTest.java, FlipkartTest1.java and FlipkartTest2.java there in three different classes and the functions that I am using should be there in one common file - functions.java
public class Flipkart {
public static WebDriver driver;
#BeforeClass
public void beforeClass()
{
driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(30000, TimeUnit.MILLISECONDS);
}
#Test
public void FlipkartTest() throws InterruptedException
{
}
#Test
public void FlipkartTest1() throws InterruptedException
{
}
#Test
public void FlipkartTest2() throws InterruptedException
{
}
#AfterClass
public void tear()
{
// driver.quit();
}
}
and please let me know how to pass the driver instance to each of the tests.

You can create a Properties class. In that class you need to add a function with BeforeClass Annotation
public class Properties {
public static WebDriver driver;
#BeforeClass(alwaysRun=true)
public void LaunchBrowser()
{
driver = new FirefoxDriver();
}
}
Then you have to inherit properties class in your test classes
public class Flipkart1 entends Properties {}
public class Flipkart2 entends Properties {}

How do I pass objects between classes

I'm trying to encapsulate a Selenium script by breaking it up into three classes (Grid, Browser, and testCase). I'm able to get the browser to open, but I seem to be missing the connection for the testCase class to interject its commands.
Grid.java
package com.autotrader.grid;
import org.junit.After;
import org.junit.Test;
public class Grid {
Browser browser = new Browser();
TestCase testCase = new TestCase();
public Grid() {
browser.setUp("http://pbskids.org");
}
#Test
public void main() {
testCase.runCase();
}
#After
public void tearDown() throws Exception {
browser.stop();
}
}
Browser.java
package com.autotrader.grid;
import com.thoughtworks.selenium.Selenium;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebDriverBackedSelenium;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import java.util.concurrent.TimeUnit;
public class Browser {
private String baseUrl;
private String driverNamespace;
private String driverLocation;
private DesiredCapabilities capabilities;
private WebDriver driver;
public Selenium selenium;
// constructor
public Browser() {
}
public DesiredCapabilities getCapabilities() {
return this.capabilities;
}
public String getDriverLocation() {
return this.driverLocation;
}
public String getDriverNamespace() {
return this.driverNamespace;
}
public Selenium getSelenium(){
return selenium;
}
public void open (String url) {
this.selenium.open(url);
}
public void setBaseUrl(String url) {
this.baseUrl = url;
}
public void setCapabilities() {
this.capabilities = DesiredCapabilities.firefox();
this.driver = new FirefoxDriver(capabilities);
}
public void setDriverLocation(String location) {
this.driverLocation = location;
}
public void setDriverNamespace(String namespace) {
this.driverNamespace = namespace;
}
public void setSpeed(String speed){
this.selenium.setSpeed(speed);
}
public void setUp(String url){
setDriverNamespace("webdriver.firefox.driver");
setDriverLocation(System.getenv("ProgramFiles(x86)") + "\\Mozilla Firefox\\firefox.exe");
System.setProperty(driverNamespace,driverLocation);
setCapabilities();
setBaseUrl(url);
this.selenium = new WebDriverBackedSelenium(driver, url);
this.driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
}
public void stop(){
this.selenium.stop();
}
}
TestCase.java
package com.autotrader.grid;
import com.thoughtworks.selenium.Selenium;
public class TestCase {
Browser browser = new Browser();
Selenium selenium;
// constructor
public TestCase(){
selenium = browser.getSelenium();
}
public void runCase(){
selenium.open("/privacy/termsofuse.html?campaign=fkhp_tou");
selenium.setSpeed("1000");
}
}
So; the driver is setup, I then opened using the Selenium object (in Browser.java), but when I try to interact with the Selenium object (in TestCase.java) it's not picking it up. Thank you for any help.

Instead of:
public class Grid {
Browser browser = new Browser();
TestCase testCase = new TestCase();
public Grid() {
...
Try:
public class Grid {
Browser browser = new Browser();
TestCase testCase = new TestCase(browser); // <-- this line changed
public Grid() {
...
And in here:
public class TestCase {
Browser browser = new Browser();
Selenium selenium;
// constructor
public TestCase(){
selenium = browser.getSelenium();
}
...
Do like this:
public class TestCase {
Browser browser = new Browser(); // <-- this line changed
Selenium selenium;
// constructor
public TestCase(Browser browser){ // <-- this line changed
this.browser = browser; // <-- this line was added
selenium = browser.getSelenium();
}
...

I don't see that you're ever initializing your Selenium object except for in Browser's setUp(String url) method. And that method is also not being called here.
You've also made your Browser's Selenium object public, so you don't need to declare another Selenium object in TestCase that's assigned by an accessor method -- you can just reference it from TestCase's Browser object.