6.
JUNIT TESTING
JUNIT TESTING
To implement the testing concept using Junit Testing
TESTING
Process of finding errors in given application
DEBUGGING
Process of finding errors and Correcting errors in given application
RECOMMENDED IDE
NetBeans IDE
Eclipse IDE
INSTRUCTIONS TO THE CODER (CODING CONVENTION)
1. Name of the test class must end with "Test".
2. Name of the method must begin with "test".
3. Return type of a test method must be void.
4. Test method must not throw any exception.
5. Test method must not have any parameter.
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I. JUNIT TESTING FOR SIMPLE ARTHMETIC CALC APPLICATION
APPLICATION : SIMPLE CALC
APPLICATION TYPE : JAVA CONSOLE APPLICATION
TYPE OF TESTING : UNIT TESTING (WHITE BOX)
IDE : NETBEANS 7.3.1
CONTENTS : 1 LOGIC FILE, 1 TESTED FILE
FRAMEWORK : JUNIT 1.4.10
MAJOR FUNCTIONS
1. add()
2. mul()
3. sub()
4. div()
1. SOURCE CODE
(Jcalc.java)
public class Jcalc {
// add method
public int add(int a, int b)
{
return(a+b);
}
// mul method
public int mul(int a, int b)
{
return(a*b);
}
// sub method
public int sub(int a, int b)
{
return(a-b);
}
// div method
public int div(int a, int b)
{
return(a/b);
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}
}
2. SNAPSHOTS FOR ADDING A TEST SOURCE CODE FOR EXISTING SOURCE FILE
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3. CREATING A TEST CLASS IN NETBEANS IDE
4. TEST CLASS
(JCalcTest.java)
import org.junit.*;
import static org.junit.Assert.*;
// Test Class
public class JcalcTest {
@Test
public void testAdd() {
System.out.println("add");
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int a = 100;
int b = 300;
// creating an object for input source code
Jcalc obj = new Jcalc();
// expected result
int expResult = 400;
// actual result: testing execution
int actualresult = obj.add(a, b);
// testing evaluation
assertEquals(expResult, actualresult);
@Test
public void testMul() {
System.out.println("mul");
int a = 0;
int b = 0;
// creating an object for input source code
Jcalc obj = new Jcalc();
// expected result
int expResult = 0;
// actual result: testing execution
int result = obj.mul(a, b);
// testing evaluation
assertEquals(expResult, result);
@Test
public void testSub() {
System.out.println("sub");
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int a = 0;
int b = 0;
// creating an object for input source code
Jcalc ss = new Jcalc();
// expected result
int expResult = 50;
// actual result: testing execution
int result = ss.sub(a, b);
// testing evaluation
assertEquals(expResult, result);
@Test
public void testDiv() {
System.out.println("div");
int a = 500;
int b = 50;
// creating an object for input source code
Jcalc obj = new Jcalc();
// expected result
int expResult = 10;
// actual result: testing execution
int result = obj.div(a, b);
// testing evaluation
assertEquals(expResult, result);
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5. PROJECT FOLDER SNAPSHOTS
7
6. OUTPUT
6.1 SUCCESSFUL TESTING EXECUTION
8
6.2 FAILURE TESTING EXCUTION
9
II. EXAMPLE OF TESTING ATM SYSTEM USING JUNIT-TESTING
APPLICATION : ATM
APPLICATION TYPE : JAVA CONSOLE APPLICATION
TYPE OF TESTING : UNIT TESTING (WHITE BOX)
IDE : NETBEANS 7.3.1
CONTENTS : 1 LOGIC FILE, 1 TESTED FILE
FRAMEWORK : JUNIT 1.4.10
MAJOR FUNCTIONS
1. Login() : testing user name & password correctly
2. Deposit() : testing valid deposit amount
3. Withdrawal() : testing valid withdrawal amount
4. Change Password() : testing valid new password
1. SOURCE CODE
(Atm.java)
public class Atm {
static public int bal=5500;
boolean flag=false;
// Default user name and password
static String user="sourav",pwd="pugazh";
// Login Module
public boolean Login(String u, String p)
{
flag=false;
// Test case: (i) user name & password must be equal to default user name and password
if((user.equals(u))&&(pwd.equals(p)))
{
flag=true;
}
return flag;
}
// Deposit Module
public boolean Deposit(int amt)
{
flag=false;
// Test case: (i) Deposit amount must be >=100
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if(amt>=100)
{
bal+=amt;
flag=true;
}
return flag;
}
// Withdrawal Module
public boolean Withdrawl(int amt)
{
flag=false;
// Two Test cases: (i) withdrawl amt must be 100 minimum. (ii) minimum balance must be
>=500 always
if(((bal-amt)>=500)&&(amt>=100))
{
bal-=amt;
flag=true;
}
return flag;
}
// Password Change Module
public boolean ChangePaaaword(String newPassword)
{
flag=false;
// Test case: (i) new password must not match old password
if(newPassword.equals(user)==false)
{
pwd=newPassword;
flag=true;
}
return flag;
}
}
2. TEST CLASS
(AtmTest.java)
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
public class AtmTest {
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@Test
public void testLogin() {
System.out.println("Login");
String u = "sourav"; // user name
String p = "pugazh"; // password
Atm log = new Atm();
boolean expResult = true;
// test execution
boolean result = log.Login(u, p);
// testing evaluation
assertEquals(expResult, result);
}
@Test
public void testDeposit() {
System.out.println("Deposit");
int amt = 50;
Atm obj = new Atm();
boolean expResult = true;
// test execution
boolean result = obj.Deposit(amt);
// testing evaluation
assertEquals(expResult, result);
}
@Test
public void testWithdrawl() {
System.out.println("Withdrawl");
int amt = 200;
Atm instance = new Atm();
boolean expResult = true;
// test execution
boolean result = instance.Withdrawl(amt);
// testing evaluation
assertEquals(expResult, result);
}
@Test
public void testChangePassword() {
System.out.println("Change Password");
String newPassword = "pugazh";
Atm pw = new Atm();
boolean expResult = true;
// test execution
boolean result = pw.ChangePassword(newPassword);
// testing evaluation
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assertEquals(expResult, result);
}
}
3. ATM PROJECT FOLDER SNAPSHOTS
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4. OUTPUT
4.1 SUCCESSFUL TESTING EXCUTION
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4.2 FAILURE TESTING EXCUTION
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