By Sanjib Dhar
8/13/2013 techniqpatch.blogspot.com 1
Why & What is Unit Testing
 Testing is the process of checking the functionality of
the application whether it is working...
What is JUnit ?
 JUnit is a Regression Testing Framework* for the Java
Programming Language. It is important in the test ...
How it works !!!
 The idea is first testing then coding.
 Test a little , code a little, test a little,
code a little ,…...
Features
 JUnit is an open source framework
 Provides Annotation to identify the test methods.
 Provides Assertions for...
What is Test case ??
 A test case in software engineering is a set of
conditions or variables under which a tester will
d...
Test case in JUnit !!!
 A Unit Test Case is a part of code which ensures that
the another part of code (method) works as ...
JUnit - Environment Setup
 First setup jdk.
 Set the environment variable JUNIT_HOME to
C:JUNIT .
 Set the environment ...
Component of JUnit
 JUnit test framework provides following important
features/component
Fixtures
Test suites
Test run...
Fixtures
 Fixtures is a fixed state of a set of objects used as a
baseline for running tests. The purpose of a test fixtu...
Fixture Example
import junit.framework.*;
public class JavaTest extends TestCase {
protected int value1, value2;
// assign...
Test Suite
 Test suite means bundle a few unit test cases and run
it together. In JUnit, both @RunWith and
@Suite annotat...
Test Suite Example
Suite test class Classes to be tested
import
org.junit.runner.RunWi
th;
import
org.junit.runners.Suite;...
Test Runner
 Test runner is used for executing the test cases.
 Uses runClasses method of JUnitCore class of JUnit to
ru...
Example of Test Runner
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notifica...
JUnit API’s
 Assert
 TestCase
 TestResult
 TestSuite
8/13/2013 techniqpatch.blogspot.com 16
Assert
public class Assert extends java.lang.Object
This class provides a set of assertion methods useful for
writing test...
Assert Example
import org.junit.Test;
import static org.junit.Assert.*;
public class TestAssertions {
@Test
public void te...
TestCase Class
public abstract class TestCase extends Assert implements Test
A test case defines the fixture to run multip...
TestCase Example
package tv.seachange.ism.utils;
import junit.framework.TestCase;
import org.junit.Before;
import org.juni...
Test Result
 A TestResult collects the results of executing a test
case.Some of its methods are:
 void addError(Test tes...
TestSuite Class
 A TestSuite is a Composite of Tests. It runs a collection
of test cases. Some of the methods are
 void ...
TestSuite Example
import junit.framework.*;
public class TestSuiteTest {
public static void main(String[] a) {
// add the ...
Execution Flow
 First of all beforeClass() method execute only once
 Lastly, the afterClass() method executes only once....
Execution Flow Example
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.Befo...
Ignore Test
 Sometimes it happens that our code is not ready and
test case written to test that method/code will fail if
...
Ignored Test Example
import org.junit.Ignore;
import org.junit.Test;
@Ignore
public class IgnoreTest {
@Test
public void n...
Time test
Junit provides a handy option of Timeout. If a test case
takes more time than specified number of
milliseconds t...
Time Test xample
import org.junit.Test;
public class TimeTest {
@Test(timeout=10)
public void testTime()
{
for(int i=0;i<1...
Exception Test
 Junit provides a option of tracing the Exception
handling of code. You can test the code whether code
thr...
Exception Test Example
import org.junit.Test;
public class ExceptionTest {
@Test(expected=ArithmeticException.class)
publi...
Parameterized Test
 Junit 4 has introduced a new feature Parameterized
tests.Parameterized tests allow developer to run t...
Parameterized Test Example
@RunWith(Parameterized.class)
public class ParameterizedTest {
private Integer inputNumber;
pri...
Are we done ??
 Wow !! Now we know about Junit .But still some
question is there :
What if we want to test the dependenc...
Yes we can !!
 And the solution is TESTNG
8/13/2013 techniqpatch.blogspot.com 35
TestNG
 It stands for NEXT GENERATION JAVA TESTING.
 TestNG is a testing framework inspired
from JUnit and NUnit but int...
Features of TestNG
 Annotations.
 Run your tests in arbitrarily big thread pools with various
policies available (all me...
Annotations
import java.util.*;
import org.testng.Assert;
import org.testng.annotations.*;
public class TestNGTest1 {
priv...
Expected Exception Test
import org.testng.annotations.*;
public class TestNGTest2 {
@Test(expectedExceptions = ArithmeticE...
Ignore and Time test
 In TestNG for ignoring a test below mention
annotation is used : @Test(enabled=false)
 For Time te...
Suite or Grouping
 The grouping is used for running multiple test as a
group of tests. Unlike JUnit in TestNG we can make...
Suite or Grouping Test
public class GroupingTest {
@Test(groups="group1")
public void testingGroup1 () {
System.out.printl...
TestNG’s Parameterized Test
 TestNG’s Parameterized test is very user friendly and
flexible (either in XML file or inside...
TestNG Parameterized Example
public class ParameterizedTest {
@Test(dataProvider =
"parameterizedDataProvider")
public voi...
Dependency Test
 The TestNG has a feature called The “Dependency
Test”, means methods are tested base on dependency.
If t...
@DataProvider
 A Data Provider is a method annotated with
@DataProvider. This annotation has only one string
attribute: i...
Dependency Test example
public class DependencyTest {
@Test
public void test1() {
Object object = null;
System.out.println...
JUnit vs. TestNG
8/13/2013 techniqpatch.blogspot.com 48
References
 http://en.wikipedia.org/wiki/TestNG
 http://www.mkyong.com/tutorials/testng-tutorials/
 http://testng.org/
...
Thank YOU
8/13/2013 techniqpatch.blogspot.com 50
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Junit4&testng presentation

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This presentation describes the some of the major functionality of JUnit4 and TestNG .Each topic contains example so that a viewer can understand the usage and apply them in their code.

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Junit4&testng presentation

  1. 1. By Sanjib Dhar 8/13/2013 techniqpatch.blogspot.com 1
  2. 2. Why & What is Unit Testing  Testing is the process of checking the functionality of the application whether it is working as per requirements and to ensure that at developer level, unit testing comes into picture. Unit testing is the testing of single entity (class or method). Unit testing is very essential to every software company to give a quality product to their customers.  It ensures the delivery of right product with right functionality. 8/13/2013 techniqpatch.blogspot.com 2
  3. 3. What is JUnit ?  JUnit is a Regression Testing Framework* for the Java Programming Language. It is important in the test driven development, and is one of a family of unit testing frameworks collectively known as xUnit. *One of the main reasons for regression testing is to determine whether a change in one part of the software affects other parts of the software 8/13/2013 techniqpatch.blogspot.com 3
  4. 4. How it works !!!  The idea is first testing then coding.  Test a little , code a little, test a little, code a little ,…… 8/13/2013 techniqpatch.blogspot.com 4
  5. 5. Features  JUnit is an open source framework  Provides Annotation to identify the test methods.  Provides Assertions for testing expected results.  Provides Test runners for running tests.  Simple and easy to write. 8/13/2013 techniqpatch.blogspot.com 5
  6. 6. What is Test case ??  A test case in software engineering is a set of conditions or variables under which a tester will determine whether an application or software system is working properly or not.  A test case definition include the following information :  pre-conditions  Set of input values  Set of expected results  How to execute the test and check results  Expected post-conditions. 8/13/2013 techniqpatch.blogspot.com 6
  7. 7. Test case in JUnit !!!  A Unit Test Case is a part of code which ensures that the another part of code (method) works as expected.  A formal written unit test case is characterized by a known input and by an expected output.  There must be at least two unit test cases for each requirement: one positive test and one negative test. 8/13/2013 techniqpatch.blogspot.com 7
  8. 8. JUnit - Environment Setup  First setup jdk.  Set the environment variable JUNIT_HOME to C:JUNIT .  Set the environment variable CLASSPATH to %CLASSPATH%;%JUNIT_HOME%junit4.10.jar;.;  If you are using Eclipse , install the plug-in for JUnit. 8/13/2013 techniqpatch.blogspot.com 8
  9. 9. Component of JUnit  JUnit test framework provides following important features/component Fixtures Test suites Test runners JUnit classes 8/13/2013 techniqpatch.blogspot.com 9
  10. 10. Fixtures  Fixtures is a fixed state of a set of objects used as a baseline for running tests. The purpose of a test fixture is to ensure that there is a well known and fixed environment in which tests are run so that results are repeatable. It includes setUp() method which runs before every test invocation. tearDown() method which runs after every test method. 8/13/2013 techniqpatch.blogspot.com 10
  11. 11. Fixture Example import junit.framework.*; public class JavaTest extends TestCase { protected int value1, value2; // assigning the values protected void setUp(){ value1=2; value2=3; } // test method to add two values @Test public void testAdd(){ double result= value1 + value2; assertTrue(result == 5); } protected void tearDown () { //release resource } } 8/13/2013 techniqpatch.blogspot.com 11
  12. 12. Test Suite  Test suite means bundle a few unit test cases and run it together. In JUnit, both @RunWith and @Suite annotation are used to run the suite test. 8/13/2013 techniqpatch.blogspot.com 12
  13. 13. Test Suite Example Suite test class Classes to be tested import org.junit.runner.RunWi th; import org.junit.runners.Suite; @RunWith(Suite.class) @Suite.SuiteClasses({ TestJunit1.class, TestJun it2.class }) public class JunitTestSuite { } import org.junit.Test; import org.junit.Ignore; import static org.junit.Assert.assertEquals; public class TestJunit1 { String message = "Robert"; @Test public void testPrintMessage() { assertEquals(message,”hii”); } } //create another class as TestJunit2 8/13/2013 techniqpatch.blogspot.com 13
  14. 14. Test Runner  Test runner is used for executing the test cases.  Uses runClasses method of JUnitCore class of JUnit to run test case of created test class.  Gets the result of test cases run in Result Object.  Gets failure(s) using getFailures() methods of Result object.  Gets Success result using wasSuccessful() methods of Result object. 8/13/2013 techniqpatch.blogspot.com 14
  15. 15. Example of Test Runner import org.junit.runner.JUnitCore; import org.junit.runner.Result; import org.junit.runner.notification.Failure; public class TestRunner { public static void main(String[] args) { Result result = JUnitCore.runClasses(TestJunit.class); for (Failure failure : result.getFailures()) { System.out.println(failure.toString()); } System.out.println(result.wasSuccessful()); } } 8/13/2013 techniqpatch.blogspot.com 15
  16. 16. JUnit API’s  Assert  TestCase  TestResult  TestSuite 8/13/2013 techniqpatch.blogspot.com 16
  17. 17. Assert public class Assert extends java.lang.Object This class provides a set of assertion methods useful for writing tests. Only failed assertions are recorded. Some of the important methods of Assert class are:  void assertEquals(boolean expected, boolean actual)  void assertFalse(boolean condition)  void assertNotNull(Object object)  void assertNull(Object object)  void assertTrue(boolean condition)  void fail()  void assertSame(boolean condition)  void assertNotSame(boolean condition) 8/13/2013 techniqpatch.blogspot.com 17
  18. 18. Assert Example import org.junit.Test; import static org.junit.Assert.*; public class TestAssertions { @Test public void testAssertions() { //test data String str1 = new String (“sanjib"); String str2 = new String (“sanjib"); String str3 = null; String str4 = "abc"; String str5 = "abc"; int val1 = 5; int val2 = 6; String[] expectedArray = {"one", "two", "three"}; String[] resultArray = {"one", "two", "three"}; //Check that two objects are equal assertEquals(str1, str2); //Check that a condition is true assertTrue (val1 < val2); //Check that a condition is false assertFalse(val1 > val2); //Check that an object isn't null assertNotNull(str1); //Check that an object is null assertNull(str3); //Check if two object references point to the same object assertSame(str4,str5); //Check if two object references not point to the same object assertNotSame(str1,str3); //Check whether two arrays are equal to each other. assertArrayEquals(expectedArray, resultArray); } } 8/13/2013 techniqpatch.blogspot.com 18
  19. 19. TestCase Class public abstract class TestCase extends Assert implements Test A test case defines the fixture to run multiple tests.Some important method of this class are:  int countTestCases() //Counts the number of test cases  TestResult createResult()//Creates a default TestResult object.  String getName() //Gets the name of a TestCase.  TestResult run() //method to run thetest.  void run(TestResult result) //Runs the test case and collects the results in TestResult.  void setName(String name)  void setUp()//e.g. open a network connection.  void tearDown() //e.g. close a network connection 8/13/2013 techniqpatch.blogspot.com 19
  20. 20. TestCase Example package tv.seachange.ism.utils; import junit.framework.TestCase; import org.junit.Before; import org.junit.Test; public class TestCaseClass extends TestCase { protected double val1,val2; @Before public void setUp() { val1= 2.0; val2= 3.0; } @Test public void testAdd() { System.out.println("No of Test Case = "+ this.countTestCases()); //count the number of test cases String name= this.getName(); //test getName System.out.println("Test Case Name = "+ name); this.setName("newName"); //test setName String newName= this.getName(); System.out.println("Updated Test Case Name = "+ newName); assertFalse(val1>val2); } public void tearDown( ) {//tearDown used to close the connection or clean up activities } } 8/13/2013 techniqpatch.blogspot.com 20
  21. 21. Test Result  A TestResult collects the results of executing a test case.Some of its methods are:  void addError(Test test, Throwable t)//Adds an error to the list of errors.  void addFailure(Test test, AssertionFailedError t)//Adds a failure to the list of failures.  int errorCount()//Gets the number of detected errors.  int failureCount()//Gets the number of detected failures.  void run(TestCase test)//Runs a TestCase.  void stop()//Marks that the test run should stop. 8/13/2013 techniqpatch.blogspot.com 21
  22. 22. TestSuite Class  A TestSuite is a Composite of Tests. It runs a collection of test cases. Some of the methods are  void addTest(Test test)//Adds a test to the suite.  int countTestCases()//Counts the number of test cases that will be run by this test.  String getName()//Returns the name of the suite.  void setName(String name)//Sets the name of the suite.  Test testAt(int index)//Returns the test at the given index. 8/13/2013 techniqpatch.blogspot.com 22
  23. 23. TestSuite Example import junit.framework.*; public class TestSuiteTest { public static void main(String[] a) { // add the test's in the suite TestSuite suite = new TestSuite(JunitTest1.class, JunitTest2.class, JunitTest3.class ); TestResult result = new TestResult(); suite.run(result); System.out.println("Number of test cases = " + result.runCount()); } } 8/13/2013 techniqpatch.blogspot.com 23
  24. 24. Execution Flow  First of all beforeClass() method execute only once  Lastly, the afterClass() method executes only once.  before() method executes for each test case but before executing the test case.  after() method executes for each test case but after the execution of test case  In between before() and after() each test case executes. 8/13/2013 techniqpatch.blogspot.com 24
  25. 25. Execution Flow Example import org.junit.After; import org.junit.AfterClass; import org.junit.Before; import org.junit.BeforeClass; import org.junit.Ignore; import org.junit.Test; public class JunitExecutionFlow { //execute only once, in the starting @BeforeClass public static void beforeClass() { System.out.println("in before class"); } //execute only once, in the end @AfterClass public static void afterClass() { System.out.println("in after class"); } //execute for each test, before executing test @Before public void before() { System.out.println("in before"); } //execute for each test, after executing test @After public void after() { System.out.println("in after"); } //test case 1 @Test public void testCase1() { System.out.println("in test case 1"); } //test case 2 @Test public void testCase2() { System.out.println("in test case 2"); } } 8/13/2013 techniqpatch.blogspot.com 25
  26. 26. Ignore Test  Sometimes it happens that our code is not ready and test case written to test that method/code will fail if run or we just don’t want to test that test case at that moment. The @Ignore annotation helps in this regards. A test method annotated with @Ignore will not be executed. If a test class is annotated with @Ignore then all of its test methods will be ignored. 8/13/2013 techniqpatch.blogspot.com 26
  27. 27. Ignored Test Example import org.junit.Ignore; import org.junit.Test; @Ignore public class IgnoreTest { @Test public void notIgnored() { System.out.println("this is executed"); } @Ignore @Test public void itIsIgnored() { System.out.println("This test is ignored"); } } 8/13/2013 techniqpatch.blogspot.com 27
  28. 28. Time test Junit provides a handy option of Timeout. If a test case takes more time than specified number of milliseconds then Junit will automatically mark it as failed. The timeout parameter is used along with @Test annotation. 8/13/2013 techniqpatch.blogspot.com 28
  29. 29. Time Test xample import org.junit.Test; public class TimeTest { @Test(timeout=10) public void testTime() { for(int i=0;i<1000;i++){ System.out.println("hiiiiii"); } } } 8/13/2013 techniqpatch.blogspot.com 29
  30. 30. Exception Test  Junit provides a option of tracing the Exception handling of code. You can test the code whether code throws desired exception or not. The expected parameter is used along with @Test annotation. 8/13/2013 techniqpatch.blogspot.com 30
  31. 31. Exception Test Example import org.junit.Test; public class ExceptionTest { @Test(expected=ArithmeticException.class) public void exception() { int s=12/0; } } 8/13/2013 techniqpatch.blogspot.com 31
  32. 32. Parameterized Test  Junit 4 has introduced a new feature Parameterized tests.Parameterized tests allow developer to run the same test over and over again using different values. There are five steps, that you need to follow to create Parameterized tests.  Annotate test class with @RunWith(Parameterized.class)  Create a public static method annotated with @Parameters that returns a Collection of Objects (as Array) as test data set.  Create a public constructor that takes in what is equivalent to one "row" of test data.  Create an instance variable for each "column" of test data.  Create your tests case(s) using the instance variables as the source of the test data. 8/13/2013 techniqpatch.blogspot.com 32
  33. 33. Parameterized Test Example @RunWith(Parameterized.class) public class ParameterizedTest { private Integer inputNumber; private Boolean expectedResult; private OddEvenChecker oddEvenChecker; @Before public void initialize() { oddEvenChecker = new OddEvenChecker(); } public ParameterizedTest(Integer inputNumber, Boolean expectedResult) { this.inputNumber = inputNumber; this.expectedResult = expectedResult; } @Parameterized.Parameters public static Collection checkNumbers() { return Arrays.asList(new Object[][] { { 2, true },{ 6, true },{ 19, false },{ 22, true },{ 23, false } }); } @Test public void testOddEvenChecker() { System.out.println("Parameterized Number is : " + inputNumber); assertEquals(expectedResult, oddEvenChecker.checkNumber(inputNumber)); } } 8/13/2013 techniqpatch.blogspot.com 33
  34. 34. Are we done ??  Wow !! Now we know about Junit .But still some question is there : What if we want to test the dependency ? Or What if we want to use Object as parameter not only primitives ?? 8/13/2013 techniqpatch.blogspot.com 34
  35. 35. Yes we can !!  And the solution is TESTNG 8/13/2013 techniqpatch.blogspot.com 35
  36. 36. TestNG  It stands for NEXT GENERATION JAVA TESTING.  TestNG is a testing framework inspired from JUnit and NUnit but introducing some new functionalities in order to make it more powerful and easier to use. 8/13/2013 techniqpatch.blogspot.com 36
  37. 37. Features of TestNG  Annotations.  Run your tests in arbitrarily big thread pools with various policies available (all methods in their own thread, one thread per test class, etc...).  Flexible test configuration.  Support for data-driven testing (with @DataProvider).  Support for parameters.  Powerful execution model (no more TestSuite).  Supported by a variety of tools and plug-ins (Eclipse, IDEA, Maven, etc...).  Dependent methods for application server testing. 8/13/2013 techniqpatch.blogspot.com 37
  38. 38. Annotations import java.util.*; import org.testng.Assert; import org.testng.annotations.*; public class TestNGTest1 { private Collection collection; @BeforeClass public void oneTimeSetUp() { // one-time initialization code System.out.println("@BeforeClass - oneTimeSetUp"); } @AfterClass public void oneTimeTearDown() { // one-time cleanup code System.out.println("@AfterClass - oneTimeTearDown"); } @BeforeMethod public void setUp() { collection = new ArrayList(); System.out.println("@BeforeMethod - setUp"); } @AfterMethod public void tearDown() { collection.clear(); System.out.println("@AfterMethod - tearDown"); } @Test public void testEmptyCollection() { Assert.assertEquals(collection.isEmpty(),true); System.out.println("@Test - testEmptyCollection"); } @Test public void testOneItemCollection() { collection.add("itemA"); Assert.assertEquals(collection.size(),1); System.out.println("@Test - testOneItemCollection"); } } The annotations are : @BeforeClass @AfterClass @BeforeMethod @AfterMethod @Test @BeforeTest @AfterTest etc.. 8/13/2013 techniqpatch.blogspot.com 38
  39. 39. Expected Exception Test import org.testng.annotations.*; public class TestNGTest2 { @Test(expectedExceptions = ArithmeticException.class) public void divisionWithException() { int i = 1/0; } } 8/13/2013 techniqpatch.blogspot.com 39
  40. 40. Ignore and Time test  In TestNG for ignoring a test below mention annotation is used : @Test(enabled=false)  For Time test the annotation is same as Junit. @Test(timeOut = 1000) 8/13/2013 techniqpatch.blogspot.com 40
  41. 41. Suite or Grouping  The grouping is used for running multiple test as a group of tests. Unlike JUnit in TestNG we can make different group of test method and can run single or multiple group. 8/13/2013 techniqpatch.blogspot.com 41
  42. 42. Suite or Grouping Test public class GroupingTest { @Test(groups="group1") public void testingGroup1 () { System.out.println("Method - testingMethod1()"); } @Test(groups="group2") public void testingGroup2 () { System.out.println("Method - testingMethod2()"); } @Test(groups="group1") public void testingGroup1_1 () { System.out.println("Method - testingMethod1_1()"); } @Test(groups="group3") public void testingGroup4() { System.out.println("Method - testingMethod4()"); } } 8/13/2013 techniqpatch.blogspot.com 42 <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" > <suite name="My suite"> <test name="testinggroup"> <groups> <run> <include name="group1"/> </run> </groups> <classes> <class name="GroupingTest" /> </classes> </test> </suite>
  43. 43. TestNG’s Parameterized Test  TestNG’s Parameterized test is very user friendly and flexible (either in XML file or inside the class). It can support many complex data type as parameter value and the possibility is unlimited. Moreover we even can pass in our own object for Parameterized test. 8/13/2013 techniqpatch.blogspot.com 43
  44. 44. TestNG Parameterized Example public class ParameterizedTest { @Test(dataProvider = "parameterizedDataProvider") public void testParameter(User user,boolean flag) { System.out.println("the user name is :"+user.getName()); System.out.println("the user id is :"+user.getId()); } @DataProvider(name="parameterizedDataProvi der") public Object[][] parameterizedDataProvider() { return new Object[][] { {new User("Sanjib",1),true}, {new User("Dhar",2),false} }; } } class User{ private String name; private int id; public User() { } public User(String name, int id) { this.name = name; this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getId() { return id; } public void setId(int id) { this.id = id; } } 8/13/2013 techniqpatch.blogspot.com 44
  45. 45. Dependency Test  The TestNG has a feature called The “Dependency Test”, means methods are tested base on dependency. If the dependent method fails, all the subsequent test methods will be skipped, not marked as failed. 8/13/2013 techniqpatch.blogspot.com 45
  46. 46. @DataProvider  A Data Provider is a method annotated with @DataProvider. This annotation has only one string attribute: its name. If the name is not supplied, theData Provider’s name automatically defaults to the method’s name.  A Data Provider returns Java objects that will be passed as parameters to an @Test method. The name of the Data Provider to receive parameters from is specified in the dataProvider attribute of the @Test annotation. 8/13/2013 techniqpatch.blogspot.com 46
  47. 47. Dependency Test example public class DependencyTest { @Test public void test1() { Object object = null; System.out.println("This is test1"); Assert.assertNotNull(object); } @Test(dependsOnMethods={“test1"}) public void test2() { System.out.println("This is test2"); } @Test public void test3() { System.out.println("This is test3"); } } 8/13/2013 techniqpatch.blogspot.com 47
  48. 48. JUnit vs. TestNG 8/13/2013 techniqpatch.blogspot.com 48
  49. 49. References  http://en.wikipedia.org/wiki/TestNG  http://www.mkyong.com/tutorials/testng-tutorials/  http://testng.org/  www.tutorialspoint.com 8/13/2013 techniqpatch.blogspot.com 49
  50. 50. Thank YOU 8/13/2013 techniqpatch.blogspot.com 50
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