Black-Box Testing

Nowadays, almost every company’s progress depends on the tenable software that helps companies come to terms with a better service provider. In this course, it becomes vital to give an overview of software performance to improve the quality and eliminate the tardy progress. Here, black-box testing can help you. 

What is Black-Box Testing?

It is a software testing method in which the functionalities of software applications are tested without being tempted to know its internal code structure, implementation details, and internal paths. Black Box Testing mainly keeps tabs on the input and output of software applications for the taking. And it is wholly based on software requirements and specifications. Hence, It is also known as behavioral or specification-based testing. Based on an analysis of the appropriate test basis, for example, use cases, user stories, requirements specification, business processes, or even the customer knowledge or common sense. 

Here are some black-box testing techniques you should go through to choose the best fit-for-you:

Black-Box Testing Techniques

1. Equivalence Partitioning

Equivalence partitioning (EP) is a comprehensive domain-oriented technique. In this technique, there is a given domain of some variables, which is divided into a finite number of nonempty subsets called equivalence classes or equivalence partitions. The intention is just simple: the partitioning should be done in a way that for any two values from the same equivalence class, the system under test behaves similarly. In particular, this means: if for one of these values the system fails, it should also fail for the other one. After partitioning the domain, it assures to test only one value from each partition.

2. Boundary Value Analysis

Boundary value analysis (BVA) is very much like EP---a domain-oriented technique. Also, it built upon the equivalence partitioning method. The initial step in applying the BVA is to perform the equivalence partitioning of a given domain. 

The difference between EP and BVA lies in the way in which we choose class representatives for the sake of tests. In the case of EP, we had to take up one arbitrary element from each class. Whereas in the case of BVA, we take up only the so-called boundary values of the identified classes. 

The idea of this method angles for the errors that often tarry on the boundary values of the domains.

3. State Transition Testing

The state transition testing method is used when we want to check the behavioural aspect of the system: its behaviour in time. The model for such tests is a finite state machine called a state transition model. This model presents the next feasible system’s behavior depending on its history (which is represented by the machine’s current state) and occurring events.

4. Use Case Testing

A use case specifies the performance of a system that associates with one or more actors resulting in an observable result of value to the actors. An actor is typically a user,

But, sometimes, it might be the other system as well. Well-structured use cases infer essential system or subsystem behaviors only and are neither overly general nor too specific.

There is no standard way to write these test cases. In practice, the use cases might have their structure simplified, for not always the full level of detail is required.

                  Summary of the black-box techniques

I hope this article will help you learn about Black-Box Testing and its techniques. We insist you comment on your experience with this article. And get in touch with us in case of any tentative queries.