Boundary Value Testing Technique Training

Agenda

Introduction
Technique
Examples
Applicability and Limitations
Summary
Practice
References

Introduction

Equivalence class testing is the most basic test design technique. It

Introduction

What is boundary value testing? Why do we need it?

Boundary value testing

Introduction: Situation 1

We are writing a module for a human resources

Introduction: Edge

Notice the problem at the boundaries – the "edges" of

Introduction: Solution 1

If (applicantAge >= 0 && applicantAge <=16)
hireStatus="NO";
If

Introduction: Inspection

The most efficient way of finding such defects, either in

Introduction: Situation 2

Perhaps this is what our organization meant:
0-15 – Don't

Introduction: Solution 2

The code that implements the corrected rules is:
If (applicantAge

Technique

Technique: Steps

Identify the equivalence classes.
Identify the boundaries of each equivalence

Technique: Examples

"Below" and "above" are relative terms and depend on the

Technique: Examples

If the boundary is $5.00 and the unit is "US

Technique: Examples

Which boundary values will we use if we test casino,

Technique: Examples

Why do we need to test one value above and

Technique: Tips

Note that a point just above one boundary may be

Technique: Continuous

Boundary values for a continuous range of inputs.
Test data input

Technique: Discrete

Boundary values for a discrete range of inputs.
Test data input

Technique: Fractional

What are boundary values here if we may have fractional

Technique: Fractional

We need to have here several solutions what to do

Technique: Array

What are boundary values here?
No boundaries.

Technique: Combination

Rarely we will have the time to create individual tests

Technique: Combination

Technique: Usage

Why do we need values above and below edge?
Higher test

Examples

Examples: 1

Input to this field can be between one and four

Examples: 2

34,4; 34,5; 42; 42,1

A thermometer can have values between 34,5

Applicability and Limitations

Applicability and Limitations

Boundary value testing can significantly reduce the number of

Summary

Summary

While equivalence class testing is useful, its greatest contribution is to

Practice

Practice

ZIP Code – five numeric digits. Legitimate ZIP Codes in the

Practice: Answers 1

ZIP Code – five numeric digits. Legitimate ZIP Codes

Practice: Answers 2

Last Name – one through fifteen characters (including alphabetic

Practice: Answers 3

User ID – eight characters at least two of

Practice: Answers 4

Course ID – three alpha characters representing the department

Practice: Answers 5

References