Solved

Java - how do i write a test case for java application, Junit ???

Posted on 2012-03-15
3
438 Views
Last Modified: 2012-06-21
OK. As Yan's help, I almost finish 50% of my work, now I need to the best way how to write a test case in java. My lecture mentioned about Junit, but this is only for J2EE web-based application only. I think.
for me, just a simple schooladdressbook application, please give me some idea how to do it. gave me a good example, would be very very appreicated. Yan, I hope you can help me for this as well as you help me from the very beginnning.
0
Comment
Question by:unistudent
  • 2
3 Comments
 
LVL 35

Accepted Solution

by:
mccarl earned 500 total points
ID: 37728059
JUnit, is NOT just for J2EE

I would suggest you look at using it, it is quite commonly used. If you are using an IDE, it can probably create the template test class for you. You would need to provide a bit more detail about your code, the sort of tests that you want to do, your environment/IDE for me to help much further.
0
 

Author Comment

by:unistudent
ID: 37728111
Thanks for the tips.
For example, I have a Java application in which have a method to remove the duplicate record from the ArrayList, how do i write a Junit for this. There are two main methods defined in the Java Main program like below. My problem is I dont know how to create a Junit to test for sort and remove duplicate functions. Please advise. example codes are very much appreicated.

public class SchoolAddressBook {

  public SchoolAddressBook(ArrayList<Contact> ar){
        this.ar = ar;
    }


  void sortSchoolAddressBook() {
        Collections.sort(ar);
    }

  void removeDuplicates() {
             ArrayList<Contact> ar1 = new ArrayList<Contact>();
              for(Contact c : ar){
                  if(!ar1.contains(c))ar1.add(c);
              }
              ar = ar1;
          }


   public static void main (String args[]) {
0
 
LVL 35

Expert Comment

by:mccarl
ID: 37731825
You would create a separate class to the above that looks something like this...


public class SchoolAddressBookTest {
  @Test
  public void testSorting {
    List<Contact> testList = new ArrayList<Contact>();
    testList.add(new Contact(.....));   // Fill in some test data here
    testList.add(new Contact(.....));   // Fill in some test data here
    testList.add(new Contact(.....));   // Fill in some test data here

    SchoolAddressBook testAddrBook = new SchoolAddressBook(testList);

    testAddrBook.sortSchoolAddressBook();

    assertEquals("Addison", testAddrBook.get(0).getName);  // Change this to whatever method you have of retrieving the first contact's name
    assertEquals("Brown", testAddrBook.get(1).getName);  // Change this to whatever method you have of retrieving the second contact's name
    assertEquals("Cochrane", testAddrBook.get(2).getName);  // Change this to whatever method you have of retrieving the third contact's name
  }

  @Test
  public void testDuplicateRemoval {
    // Do similar to the above but load the testList with duplicates and 'assert' that they have been removed after calling the removeDuplicates() method
  }
}

Open in new window


And include junit jar's and add appropriate import statements. Then depending on your environment/IDE, you should be able to execute this class as a junit test.
0

Featured Post

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Android studio getdrawable(int) is deprecated 4 82
groupNoAdj 7 95
groupSum5 challenge 5 84
oracle 11g 23 75
By the end of 1980s, object oriented programming using languages like C++, Simula69 and ObjectPascal gained momentum. It looked like programmers finally found the perfect language. C++ successfully combined the object oriented principles of Simula w…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.

785 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question