Software testing is a methodology to examine the operational capacity of software, and it is primarily subdivided into two modes: White Box testing and Black Box testing. The article below finds out about Black Box testing.
Here you will also learn about the appropriate black box testing techniques and the differences between software testing White Box and Black Box testing.
A simplified Black Box testing definition is a process of inspecting the software functionality from the point of view of an ordinary user. The fundamental purpose is to detect the weak points in the software by keeping the focus on obtaining smooth workability. The Black Box penetration testing is a commonly applicable process apart from other methods to analyze the input/output values.
Black Box testing is also called behavioral testing since it involves testing of functioning or behavior of the application during its usage. At the same time, it does not include testing internal codes or app designs. Hence, the tester need not possess the technical knowledge. His role as the Black Box test engineer is to investigate the software’s composite output and expose the vulnerabilities that may pose a potential risk from the attackers.
The parameters that form the basis of the Black Box testing scenario are as given below. These are generally adopted Black Box testing techniques ISTQBfoundations and other such institutes have meticulously illustrated.
As the name suggests, the Black Box testing examines the outer layer or the tool’s functions. The main objective is to verify the flawless operation of the system. A brief description of the uses of Black Box testing is discussed below.
Theoretically, there are three main categories of Black Box testing as shown below:
The Black Box testing is a non-technical form of testing where the tester may not necessarily know computer programming. Hence, every person as a commodity user is performing Black Box testing. A typical Black Box testing example is online form filing over a software interface, where the tester may point out glitches in its operation.
Let us discuss a few more real-time examples for Black Box testing.
Computer or mobile games are typical software architecture designed to generate continuous output with user interaction. So after the game app is developed and published, the Black Box game tester performs his duty by thoroughly analyzing the features and steps involved from game download & installation to launching.
The Black Box test in evaluating a game also involves the procedure to initiate the play and how it continues in specific stages with multiple movements. The rules allocated to play the game are verified along with the gamepads or joystick consolidation to the application.
Another relevant black Box testing example is the functional testing of an android mobile messaging application. The procedure typically includes investigating the user interface to determine if the app is behaving appropriately in multiple circumstances.
The Black Box testing in the Android mobile messaging app is performed over multiple criteria, such as how people are searched and added to the friendship list. Creating a friend’s group and allowing group conversation, uploading photographs as profile pictures, and permission to share files with specific formats are some of the test cases of Black Box testing.
The three most popular approaches to Black Box testing are categorized according to the methodologies applied.
The Black Box testing process requires operational testing in a specific sequence. It is made possible by structurally designing the test cases. After analyzing the generated system requirements, the test cases are created by applying the well-classified Black Box testing techniques discussed below.
Example: A machine that only accepts data between 10 & 20, where value equal to or below 9 and equal to or above 21 will be rejected.
Example: A machine that accepts data between 10 & 20, where input values of 9,10,11 & 19,20,21 are observed to produce valid results.
Example: Verifying the condition where if the color of the fruit is red and the shape is round, then it is an apple, else it is a banana. So here, the decision table is designed to check if the shape and color are true or false to get the correct inference.
Example: Observing the aftereffects after filling an online form with incorrect entries and analyzing them in mandatory columns or predefined entry formats.
Example: Attaching an oversized or an unrelated file type over the system.
How to do Black Box Software Testing?
As explained above, the Black Box testing techniques only cover the functionality and outcome of the software instead of internal technical failures. Below are the preset testing procedures to assist the testers in finding the errors from the point of view of a user’s interaction with the tool. The Black Box penetration testing methodology is slightly different in its approach, but the primary motive is to detect external glitches of the software.
Step 1. To begin with the testing process, the first thing to do is to analyze the software requirements specifications with proper documentation.
Step 2. Now the test cases with input values are verified for their accuracy in inspecting software performance and fetching the error messages.
Step 3. Enter the input value and thoroughly check the generated output values, which should match the expected results.
Step 4. If any error is found in the results, it should be captured and collectively sent to the developers with the exact location.
Step 5. Re-evaluate the complete system after every upgrade by following all the necessary steps.
The entire procedure of Black Box testing is designed in a manner to review and authenticate the Software Development Life Cycle.
What are the Benefits?
The Black Box testing is a reasonable procedure to evaluate and validate the software performance and feasibility. Here are the most appropriate benefits of Black Box testing.
Difference Between Black Box vs. White Box Testing
Both Black Box and White Box testing are entirely different processes but have a common motive of detecting software errors. Below is a tabloid view showing differences of White Box vs. Black Box testing.
|Black Box Testing vs. White Box Testing|
|S.No.||Black Box Testing||White Box Testing|
|1.||No technical knowledge is required.||Technical knowledge is necessary.|
|2.||Performed at user-end by testers.||Performed at developer-end by programmers.|
|3.||Tests the behavior of the software.||Tests the logic of the codes.|
|4.||Tests the software functions.||Tests the software structure.|
|5.||Takes less time.||Takes more time.|
|6.||Also called closed box testing.||Also called clear box testing.|
28th January 2022
02nd December 2021