Software Testing Technique...

what is testing technique?
software testing technique is help you design better test cases.in that exhaustive testing is not possible.in this testing technique help to reduce the number of test cases to be executed while increasing testing coverage.

Method of Testing technique

• in this we using black box testing technique,
• in black box testing, testers test the application by applying different inputs and comparing the output with expected results.

*Here some types of black box testing *

1.Boundary value Analysis
2.Decision Table Testing
3.Use case Testing

Boundary value Analysis
it is mainly focuses on testing values at the boundaries or edges of valid input ranges.it is important technique as its widely recognised values on boundaries cause more error in the system. it is commonly used in functional and non functional testing.

Example

• taking a login page of web application.
• the login page has two input fields: Username and password.
• here how boundary value analysis can be applied to this scenario.

Valid boundary Testing:

    1. _Username_: suppose the valid username length is 6 to 
        20 characters. in this case, you would test input at
         boundary values:
              - Test with username of 6 characters is 
                 minimum boundary.
              - Test with username of 20 characters is 
                 maximum boundary.
    2. _Password_: the valid password length is 8to16 
        characters. you would test inputs at boundary 
        values:
              - Test with password of 8 characters is 
                 minimum boundary.
              - Test with password of 16 characters is 
                 maximum boundary.

**Invalid boundary testing :**
     - username: for invalid input, you would test the 
                 values just outside the valid range:

              - Test with username of 5 characters one less 
                than the minimum.
              - Test with username of 21 characters one more 
                than the maximum.

     - Password: for password, you test values outside valid 
                 range:

               - Test with password of 7 characters one less 
                 than the minimum.
               - Test with password of 17 characters one 
                  one more than maximum.

Edge case testing :

        - Test with an empty username and password

        - Test with special characters in username and 

          password

        - Test with username and password that include spaces

Decision Table Technique:-

in this technique is use to test a large number of inputs. decision table are structured way to represent combination of conditions and their outcomes.

Example

• to calculate the eligibility of applicants for credit card based on their age, income, credit score. eligibility criteria are:
  • applicant must be 18year old
  • applicant must have minimum annual income $30,000
  • applicant must have minimum credit score 400

decision table model:

condition age>=18 income>=$30,000 credit score>=400

Eligible 18 $31,000 450
not-Eligible 17 $35,000 400
not-Eligible 21 $30,000 300
not-Eligible 23 $25,000 500

use the decision table to create test case:

test case1 : eligible applicant


           Age : 18 yes

        income : $31,000 yes

  credit score : 450

test case 2,3,4 : not-eligible

           Age : 21 no

        income : $20,000 no

  credit score : 300

Use Case Testing:-

it is focus on a system functionality from end-user perspective. use case describe interaction between user and system to achieve specific goal.

Example
- consider E-commerce website where user can browse products, add item to cart, make purchase.

some use cases are:

Login:
- Name : User
- Description : the user login to their account
- Test case: open website, login using valid credentials
confirm that user login functionality works
as expected.

Browse products:
- Name : user
- Description: user navigate through product catalog to
view details of available items.
- Test case: open the website, go to products section,
and verify that product are displayed.

Add item to cart:
- Name : user
- Description: user select a product and add to cart
- Test case: open the website, browse products, select
one item, add it to cart, and confirm the cart.

Checkout:
- Name : user
- Description: user proceeds to checkout and provides
shipping and payments info to complete
purchase.
- Test case: open the website, add items to cart, go
to checkout process, enter shipping and
payment details, and confirm that order
is placed.
Logout:
- Name : user
- Description : the user logout to their account
- Test case: open website, logout using valid credentials
confirm that user logout functionality works
as expected.

LCSAJ Testing techniques:

it is white box testing technique, Linear code sequence and jump is structural based it . it is ensure that every executable statement in a program has been executed.