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Testing

Presented By

Prabhat Kumar

Presented By

Prabhat KumarGSBA

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Flow of Presentation

Introduction of Testing

Why Testing?

Testing Spectrum Quality assurance Technique

Testing technique

Testing Models

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Introduction

Definitions of Software Testing - Testing is the process of executing a program or

system with the intent of finding errors. -Testing is any activity aimed at evaluating an

attribute or capability of a program or system and determining

that it meets its required results. Vocabulary & Concepts

Defects, bugs, faults Testing is more than debugging

Software testing is an ART because we still can not make it a science Software testing is everywhere

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Why Testing?

For Quality bugs kill in a computerized embedded world Defect detection (find problems and get them

fixed) Better early than late Difficult to upgrade field software in embedded

systems To make quality visible For Verification & Validation(V&V): show it works: clean test/positive test or it can handle exceptional situations: dirty test/negative test

For Reliability Estimation E. . reliabilit rowth testin

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Testing SpectrumTesting Spectrum

Unit Testing - done at the lowest level.

Integration Testing -performed when two or more tested units are combined into a

larger structure. System Testing -tends to affirm the end-to-end quality of the entire system.

Acceptance Testing

- done when the completed system is handed over from the developers

to the customers or users.

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Quality AssuranceTechniques

Static Analysis focuses on the range of methods that are used to determine

or estimate software quality without reference to actualexecutions. It includes:

code inspection

program analysis symbolic analysis model checking

Dynamic Analysis deals with specific methods for ascertaining and/or

approximating software quality through actual executions, i.e., withreal data and under real (or simulated) circumstances. It includes:

synthesis of inputs the use of structurally

dictated testing procedures the automation of testing

environment generation.

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Testing Technique

Functional Testing : The selection of test cases for functional testing is

based on the requirement or design specification of the

software entity under test.

Structural Testing: The selection of test cases is basedon the

implementation of the software entity.

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Testing Models

Waterfall model

Spiral model

V model W model

Butterfly model

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Spiral ModelSpiral ModelThe test phase is divided into stages.

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V ModelV ModelV' describes the graphical arrangement of the individual phases.

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Thanku

Thanku