Difference Between Black Box Testing and White Box Testing

Black Box Testing Vs. White Box Testing: Key Differences

Software testing is the process of validating and verifying that an application or software is bug-free, meets the user specifications, meets the technical requirements, has accurate development and design, and handles all the exceptional cases.

You can classify software testing into two categories:

  • Black Box Testing
  • White Box Testing

What is Black Box Testing?

Black Box Testing is a method of software testing in which a tester does not know the internal design/ implementation/ structure of the tested item.

What is White Box Testing?

White Box Testing is a method of software testing in which the user knows the internal design/ implementation/ structure of the tested item.

Difference Between Black Box Testing and White Box Testing

Parameter

Black Box Testing

White Box Testing

Meaning

It is a software testing method in which the program or the internal structure stays hidden, and the tester has no knowledge about it.

It is a software testing method in which the tester knows about the code or the internal structure and the program involved.

Type of Testers

Mostly, software testers do this.

Mostly, hardware developers do this.

Knowledge Required

The user doesn’t require knowledge regarding implementation.

A user requires knowledge for implementation.

Type of Testing

It is a form of external or outer software testing.

It’s the inner or internal way of software testing.

Source Code Access

The tester cannot access the source code of the software.

The tester is aware of the source code and internal workings of the software.

Interface of Operation

You can conduct Black box testing at the software interface. It requires no concern with the software’s internal logical structure.

You can conduct White box testing by ensuring that all the internal operations take place according to the specifications.

Purpose of Testing

It tests the functions of the software.

It tests the structure of the software.

Basis of Initiation

You can initiate this test on the basis of the requirement specifications document.

You can only start this type of testing software after a detailed design document.

Programming Knowledge

Testers don’t require a knowledge of programming.

Testers mandatorily require a knowledge of programming.

Assessment

This testing assesses software behavior.

This testing assesses software logic.

Level of Testing

Higher levels of software testing generally involve Black Box testing.

Lower levels of software testing usually involve White Box testing.

Other Names

You can also call it closed testing.

You can also call it clear box testing.

Time Consumed

It consumes less time.

It consumes more time.

Algorithm Testing

It does not work well for algorithm testing.

It is completely suitable and preferable for algorithm testing.

Methods of Testing

One can perform it using various trial and error methods and ways.

You can better test data domains and internal or inner boundaries.

Types of Testing

Black Box Testing types:

  • Regression Testing
  • Functional Testing
  • Non-Functional Testing

White Box Testing types:

  • Condition Testing
  • Path Testing
  • Loop Testing

Examples

Example: A user searching something on a search engine like Google using certain keywords.

Example: When a user inputs to check and verify the loops.

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