An Overview of Test Design Techniques

Software testing design techniques help you optimize testing processes and write better test cases. Its purpose is to create a set of inputs that can provide a set of expected outputs. In Software development, test design technique is a procedure for determining test cases, test conditions, and test data during software testing

Importance of test design techniques

The test case is one of the significant parts of the testing phase. These techniques are applied to satisfy the goals of every individual in software development projects. Although the main purpose is to execute the test effortlessly based on various risk factors and ensure that the products meet the expectations of clients and their businesses. These design techniques are extremely important for the success of the testing process as well as the whole project. Black box test case or Specification-based design techniques are further divided into five categories, which are given below:

Boundary Value Analysis

It is a widely used case design technique because the input values near the boundary have higher chances of error and it is used to test boundary values. When the input value is within the boundary value, it is considered as ‘Positive testing’ and when the input value is outside of the boundary value, it is considered as 'Negative testing.’ The main purpose is to select test cases to execute boundary values and includes maximum and minimum values inside and outside boundaries. Normally Boundary value analysis is part of negative and stress testing.

Equivalence Partitioning

Equivalence partitioning is a Test Case Design Technique or black-box testing that divides the input data of software into different equivalence data classes. The equivalence partitioning is often derived from the requirements specification for input data that impact the processing of the test object.

Also Read: A Brief Introduction to Cross Browser Testing

Decision Table-Based Testing

The decision table technique is one of the most used design techniques for black-box testing. The main task is to identify functionalities where the output depends on a combination of inputs. It determines the result of various combinations of inputs and related to the correct combination of inputs.

Importance of Decision Table

• Decision tables are extremely helpful in test design techniques.

• Decision tables are used in model complicated logic. It also helps testers to find the effects of combinations of various inputs and other software states that must correctly implement business rules.

• Decision tables deliver a regular way of stating complex business rules, that is helpful for testers as well as for developers

• A decision table is essentially an outstanding technique used in both requirements and testing management.

State Transition

This testing technique allows the tester to test the behavior of an application under test. In the state transition technique, the testing team provides positive as well as negative input values for estimating the system behavior. This technique is used when the testing team wants to test a sequence of events that happen in the application under test and when a testing team is testing the application for a limited set of input values.

Also Read: Introduction to accessibility testing

Use Case Testing

A use case is a description of the specific use of the software by a user. In the Use Case testing technique, the test cases are designed for end-user functionalities and to execute different business scenarios. Use case testing helps to identify test cases that cover the entire system with the help of use case testing one can easily identify test cases that cover the entire system
 

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