Database Testing: White Box and Black Box

Database Testing: White Box and Black Box -magoosh

Database testing is generally considered to be the most important part of testing that helps in checking the overall functionality of the specific software. A complete software will involve a different kind of functions like the stored functions, the triggers, and the stored procedures. Database testing can be said similar to regression testing as it automatically runs the software in order to ensure integrity, the robustness of the database layer in a specific kind of a software.

What are the types of Database Testing

There are different kinds of database testing methods which are black box testing method and the white box testing method.

Black Box Testing Method

The black box testing method generally involves the testing of interfaces, followed by the integration of the database, including the following:

  • The Mapping of the data
  • Verifying the incoming of the data
  • Verifying the outgoing of the data coming from the other query functions

The pros and cons of Black Box Testing

The test cases, when it comes to the black box testing, are generally very simple. Their generation is completely different and independent of the software development that can be done in the early stage. For example, the programmer does have better knowledge on how to design the specific application, using less time for debugging. The cost of the entire developmental process of the black box test cases is lower than the development of the white box cases.

The major drawback of the black box test cases is that, you cannot know how much of the program is being tested. Also, there are certain errors that cannot be detected.

White Box Testing Method

The white box testing method mainly deals with the internal structure of a specific database, where the specification details are hidden from the user. The white box testing method involves the following:

  • As the coding error can be detected in the white box testing, so the internal errors can be eliminated.
  • It selects the default table values in order to check on the database consistency.
  • It checks the rule of Referential Integrity.
  • Helps in performing the module testing of the database functions, the triggers, the views, and the last but not the least, the SQL Queries.

Why do you need to perform Database Testing?

There are many numbers of reasons as to why you need to perform database testing. There is a need to perform data integrity, validation, and data consistency, by checking on the database as a backend system that is responsible for storing the data, and being accessed for multiple purposes. Given below are some of the major reasons as to why we should do database testing:

  • In a database, the data comes from multiple applications and there are chances that it might harm or change the data that is stored in the database. Therefore, it does become important that you check in the components regularly, followed by data integrity and consistency being checked regularly.
  • The black box testing which is performed on the front end is important, but it makes it difficult to isolate the problems. Having a testing done in the backend system will help in increasing the robustness of the data, giving a stronger reason as to why testing is to be performed on the back end system.
  • It has to be done in order to ease the complexity of the calls to a database backend, followed by the developers increasing the use of views and stored procedures.
  • The stored and view procedures in database testing contain critical tasks like inserting the customer names, the contact information, and the last but not the least, the sales information. These are the tasks that have to be tested multiple times at several levels.

How do you test a Database? And what do you test?

The process of database testing is not very different from the other applications. The following are some of the steps for it.

  1. Preparing the environment
  2. Running a test
  3. Checking out what result you have got from testing
  4. Validate
  5. Report the findings

When it comes to database testing, it is important that you check all the functionalities that are happening over each and every application of a specific software. The actions can here include deleting, adding, and saving options. You will have to check and see if there is any kind of a record that is added to the database with the exact value. These are some of the major roles that have to be monitored very seriously.

These days database testing is turning to be a complex procedure due to the business logics that have been playing a major role in the applications. The testers here will have to make sure that the values have been added correctly, after all the implementation of rules of the business organizations.

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