BUGSPOTTER

What Is Black Box Testing ?

Black Box Testing

What is Black Box Testing ?

Black Box Testing is a software testing method where the tester focuses on testing the functionality of the software without knowing its internal workings or code structure. In other words, the tester treats the software as a “black box,” which means they only know the inputs and expected outputs but have no knowledge of the underlying code or logic.

Features of Black Box Testing:

1.No Knowledge of Internal Code: Testers do not need to know the internal structure, logic, or design of the application. They only focus on how the software behaves based on various inputs.

 

2.Focus on Functionality: The primary goal is to ensure that the software works according to its functional requirements. This includes verifying whether the system produces the expected results under different conditions.

 

3.Test Scenarios: Black box testing includes functional tests, boundary tests, usability tests, and validation of the software’s output against expected results.

 

4.Types of Testing in Black Box:

  • Functional Testing: Verifying the functionality of the application.
  • Non-Functional Testing: Includes performance, security, and usability testing.
  • Regression Testing: Checking if new code changes break existing functionality.
  • Integration Testing: Ensuring that the various parts of the software work together.

5.Techniques Used:

  • Equivalence Partitioning: Dividing input data into valid and invalid partitions to reduce the number of test cases.
  • Boundary Value Analysis: Focusing on the boundary values of input data to identify potential errors.
  • Decision Table Testing: Using decision tables for testing different combinations of inputs and their expected outputs.
  • State Transition Testing: Testing the system’s response to different input sequences.

Advantages of Black Box Testing:

  • Tester Independence: Since testers don’t need to know the internal code, the process can be carried out by independent testers or external testing teams.
  • Focus on End-User Behavior: It simulates the real user experience, ensuring that the software meets the needs of its end-users.
  • Helps Identify Missing Functionality: Since the focus is on input and output, black box testing can reveal missing features and functionality that may not have been considered.

Disadvantages of Black Box Testing:

  • Limited Coverage: Since testers don’t have access to the code, it may not cover all possible code paths.
  • Difficult to Identify Code-Level Issues: Errors in the internal logic or structure of the code may go unnoticed.

How to Create a Simple Black Box Test Plan

A Black Box Test Plan outlines the testing approach without knowledge of the internal workings of the software. It focuses on inputs, outputs, and system behavior.

Key Components of a Simple Black Box Test Plan:

1.Test Plan Identification

  • Test Plan ID: Unique identifier (e.g., BP-001).
  • Version: Version of the plan.
  • Author: The person responsible for the plan.
  • Date: Creation or revision date.

2.Objectives and Scope

  • Objectives: What you aim to test (e.g., validating login functionality).
  • Scope: Features and functionalities covered in the test (e.g., login page, error messages). Define what is out of scope (e.g., internal code or database).

3.Test Approach

  • Testing Types: Functional, usability, compatibility testing.
  • Techniques: Equivalence Partitioning, Boundary Value Analysis.
  • Test Data: Define valid, invalid, and boundary inputs.

4.Test Items

  • Specify which components or modules are being tested (e.g., login screen, user authentication).

5.Test Deliverables

  • Test Cases: Written tests with input, steps, and expected output.
  • Test Logs: Results of the executed tests.
  • Defect Logs: Any bugs or issues found during testing.

6.Test Schedule

  • Start and End Dates: Timeline for the testing process.

7.Resource Requirements

  • Testers: Who will perform the tests.
  • Tools: Tools or software required for testing (e.g., Selenium).

8.Risks and Mitigation

  • Identify potential risks (e.g., unclear requirements) and solutions (e.g., regular reviews).

9.Entry and Exit Criteria

  • Entry: Conditions for starting testing (e.g., test cases ready, test environment set).
  • Exit: Conditions for ending testing (e.g., all tests executed, defects addressed).

Example:

  • Test Plan ID: BP-001
  • Version: 1.0
  • Author: John Doe
  • Date: 01/10/2024

Objectives:

  • Verify login functionality.

Scope:

  • In-Scope: Login page, user authentication.
  • Out-of-Scope: Database, internal code.

Test Approach:

  • Techniques: Equivalence Partitioning, Boundary Testing.
  • Test Data: Valid credentials, invalid credentials.

Schedule:

  • Start Date: 05/10/2024
  • End Date: 12/10/2024

Resources:

  • 2 Testers
  • Tools: Selenium, JIRA

This simple Black Box Test Plan structure ensures a clear and organized approach to testing without needing internal code knowledge.

Latest Posts

  • All Posts
  • Software Testing
  • Uncategorized
Load More

End of Content.

Software Testing

Get Job Ready WithBugspotter

Categories

Enroll Now and get 5% Off On Course Fees