Bug Life Cycle & Test Scenario vs Test Case – A Complete Guide for QA Beginners

If you are starting your journey in Software Testing or Quality Assurance (QA), understanding the Bug Life Cycle, Test Scenario, and Test Case is essential. These are the core concepts every QA professional uses in real-world projects.

In this article, we'll learn what they are, why they are important, how they work, and understand each concept with simple definitions and practical examples.

Bug Life Cycle (Defect Life Cycle)

Bug Life Cycle is the process that a bug goes through from the time it is identified until it is fixed and closed.

Stages of Bug Life Cycle

New

The QA tester finds a bug and reports it.

Example:

A user enters the correct username and password, but the login page does not open.

Assigned

The Project Manager or Team Lead assigns the bug to a developer.

Open

The developer starts working on the bug.

Fixed

The developer fixes the bug and sends it back to QA for testing.

Retest

The QA tester tests the application again to verify that the bug has been fixed.

Closed

If the bug is fixed successfully, the QA tester closes the bug.

Reopened

If the bug still exists after the fix, the QA tester reopens the bug and sends it back to the developer.

Example:

Scenario: The "Add to Cart" button is not working. QA finds the issue → New Team Lead assigns it to the developer → Assigned Developer starts fixing it → Open Developer fixes it → Fixed QA tests it again → Retest If it works correctly → Closed If it still does not work → Reopened

Test Scenario vs Test Case

What is a Test Scenario?

A Test Scenario is a high-level description of what needs to be tested.

Example:

Verify the Login functionality.

What is a Test Case?

A Test Case is a detailed document that explains how to test a specific feature, including the test steps, test data, expected result, and actual result.

Example:

Login Test Case Test Case ID: TC_001 Test Scenario: Verify Login Functionality

Test Steps:

1. Open the login page.
2. Enter a valid username.
3. Enter a valid password.
4. Click the Login button.

Expected Result:

The user should log in successfully.

Actual Result:

User logged in successfully.

Status:

Pass

Difference Between Test Scenario and Test Case

Test Scenario

• Describes what needs to be tested.
• High-level description.
• Covers a feature or functionality.

Test Case

• Describes how to test a feature.
• Detailed testing steps.
• Covers specific test steps and expected results.