What Design Approaches Can Be Applied to Testing?

by Nataliia Vasylyna | February 16, 2016 7:44 am

It is well-known that a lot of various approaches and principles are applied in software testing[1] field. These approaches may concern not only IT sphere. That is why curious and inquisitive employees are needed and highly required by QA company.

During mobile testing or web application testing[2], a specialist may apply various approaches to design, which have their own peculiarities and are applicable to different software checking types.

There Are Such Approaches to Design as:

• the design-by-contract approach;
• the defensive design.

According to the design-by-contract approach, the modules (methods) are defined on the basis of pre-conditions and post-conditions.

What Are the Core Factors of Design-By-Contact Approach?

• Post-conditions. They show what option the module should perform, for example, open a file, send a message, print a page, etc.
• Pre-conditions. They are more numerous. Pre-conditions describe the factors which ensure the fulfilment of the function. For instance, for opening the file, this exact file should be available – it should exist; the file should be named or have another information to be identified with; there should be the possibility for the file to be opened, etc.

The design-by-contract is the basis for testing-by-contract. Such checking type is performed only when pre-conditions are met.

The defensive design presupposes the acceptance of any input combination. In other words, defensive testing is executed under both normal and abnormal pre-conditions. This approach makes functional testing[3] more complicated and time-consuming.

Related Posts:

• What are Approaches for Manual and Automated Testing?[4]

Source URL: https://blog.qatestlab.com/2016/02/16/applied-design-approaches/

---