Download - CYPRESS Software Testing 101 1 By Rick Clements [email protected]

CYPRESS

Software Testing 1011


By Rick Clements

[email protected]

CYPRESS


Overview

Terminology

Requirements

Configuration control

Test plan

Test cases

Test procedures

Bug tracking & ship decision

After the testing

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QA vs. QC

Quality assurance (QA) - The management of quality. The encouragement of best practices. QA is about preventing defects.

Quality control (QC) - Validation and verification of the product. This includes reviews, inspections and testing.

Terminology

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Test Documents

Test plan (or validation plan) - The plan describing the general approach, the people required, equipment required and schedule for testing and other validation activities

Test cases - Specific data used to test the product.

Test procedures - The procedures to follow in testing the product. These may be manual or automated.

Terminology

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Types of Tests

Black box testing - Testing by looking at the requirements to develop test cases. System level testing is often black box testing.

White box testing - Testing by looking at the structure of the program to develop test cases. White box testing often occurs in unit testing.

Terminology

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Levels of Testing

Unit testing - The process of running small parts of the software. The design teams often handle unit testing.

Integration testing or Interface testing - The testing of pre-tested modules and hardware to determine that they work together.

System testing - The testing of the entire product to see that it meets its requirements. This occurs after the product has been integrated.

Terminology

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Software Development Process

Define Requirements

Software Design

Software Implementation

& Debug

Test DesignTest

Implementation & Debug

Software Test

Software Release

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Requirements

Why are they important?

How are they documented?

What’s important?

What if you don’t have any requirements?

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Why Are Requirements Important?

How do the designers know what to build?

How can you test that it was built correctly?

When you disagree, who’s right?

Requirements

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Documenting Requirements

Data sheet

Requirements specification

Functional specification

Data base

Traceability matrix

Requirements

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What’s Important

They exist

They are unambiguous and testable

Cover all of the customers (not just final customer)

They are under configuration control

Requirements

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No Documented Requirements

Ask the project manager

Ask the marketing representative

Has anything been sent to the customer?

Ask a domain expert

What are the designers building?

Write them down

Requirements

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Configuration Control

Why is it a testing issue?

What to track

Build & Version Number

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Why Is It A Testing Issue?

Ship the version that was tested

A single test system failing

Modules accidentally reverting to older version

Re-create software and tests


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What To Track

Requirements

Software

Hardware

Tests


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Version & Build Number

Simple to generate

Unique for each build or change

Readily visible and validated for correctness


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Test Plan

What will be tested and not tested?

What approach will be taken?

What resources are needed?

Which people are needed?

Schedule

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Test Cases

Test boundary conditions

System interfaces

Where have other errors been found?

What will the users do most often?

What is the most serious if it fails?

Usability

What is unique to your product's environment?

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Boundary Conditions

Values at and away from the boundaries

Valid and invalid values

Both numeric values and strings

Minimum-1, minimum, maximum, maximum+1, a good middle value

Test Cases

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Where Have Errors Been Found?

Errors tend to cluster

Can a common error be fixed?

Would a code review be useful?

Test Cases

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Usability

Often over looked

First to see software outside of design

The interface makes sense if you know the design

Need to know your users

Test Cases

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Interfaces

User interface

Interfaces between software modules

Interfaces to other programs

Hardware / software interfaces

Test Cases

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What Will Users Do Most Often?

Frequently encountered errors impact the user more

Test heavily used areas more heavily

Less used areas can’t be ignored

Test Cases

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What Failures Are Most Serious?

Areas data could be lost

Errors with a large financial impact

Errors that could injure someone

Test Cases

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Unique to Web Applications

Versions of browsers

Different operating systems

Server capacity

Multiple servers - one fails?

Test Cases

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Unique to GUI Based Application

System configuration changes

Size of the screen

Number of colors available

Default font type and size

Test Cases

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Unique to Database Applications

Compatible with existing data

Testing on a copy of real data

Server capacity

Test Cases

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Unique to Embedded Applications

Can multiple simultaneous stimulus be handled?

Are hardware failures handled correctly?– Running out of supplies– Components breaking or degrading

Communications errors between components

Can temperature changes cause the system to behave differently?

Test Cases

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Bug Tracking & Ship Decision

Bug states

Bug Information

Is the software ready?

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DefectDiscovered

New(lead notified)

Clarify(submitter notified)

ClosedOpen (designengineer notified)

Fixed (testengineer notified)

Requestadditional information

Informationadded by submitter

Submitted byperson who found

DuplicateNot a defect

Prioritized& assigned by lead

Is a defect

Fix made tosystem or spec

Validationfailed

Validated

Project Name:Project Path:Chart File:Chart Name:Created On:Created By:Modified On:Modified By:

Software Testing 101d:\rick\pnsqc\figures\bugstate.stdBugStateAug-10-2000Rick ClementsAug-10-2000Rick Clements


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Title: Page fault when closing the about box

Description: 3 of 4 times program Y crashed with a pagefault when launched from program X when the about boxwas closed. The program crashed 0 of 3 times whenlaunched from the start menu.

Sequence:Launch from program XOpen the about box from the “Help” menuClose the about box

Impact: If this happens after the user has been editing, theuser will lose edits.

Severity: Critical

Version: 6.0 build 3

System: All Windows

State: New

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Open Defects

Time ->

Nu

mb

er

Op

en

->

Show Stoppers

Minor

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After the Testing

Known problems and solutions– Defects not fixed– Shorten customer service leaning curve

Test report– Tuned to the audience– Introduction & conclusion– Major defects– What was run on which versions– What tests couldn’t be run

Download - CYPRESS Software Testing 101 1 By Rick Clements [email protected]

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