Test Case Design

1. Introduction
2. Test Case Design - Boundary Value Analysis
   1. Explanation
   2. Example 1: Testing a Calculator
      1. Minimum Limit
      2. Maximum Limit
   3. Example 2: Testing a Date Input Field
      1. Minimum Limit
      2. Maximum Limit
3. Summary

Introduction

This article explores Boundary Value Analysis (BVA), a crucial technique in test case design. BVA focuses on testing the boundaries of input values to identify potential defects.

Test Case Design - Boundary Value Analysis

Explanation

Boundary Value Analysis involves testing values at the edges of valid input ranges, as well as just inside and outside those ranges. This helps identify defects that might not be revealed by testing only typical values.

Example 1: Testing a Calculator

Minimum Limit

When testing division, the minimum limit is often 0. Testing with 0 can reveal issues with division by zero handling.

Maximum Limit

For addition, the maximum limit is typically the largest integer value supported by the system. Testing with this value checks for overflow errors.

Example 2: Testing a Date Input Field

Minimum Limit

For a date input field, the minimum limit might be the earliest date allowed by the system (e.g., 1/1/1900).

Maximum Limit

Similarly, the maximum limit would be the latest allowed date (e.g., 12/31/2099).

Summary

• Boundary Value Analysis tests values at the edges of input ranges.
• It helps identify off-by-one errors and other boundary-related defects.
• Consider both valid and invalid boundary values.
• Apply BVA to various input types, including numbers and dates.