2.1_Static Testing_Devops_SDLC_guide_to_everything.ppt

© Oxford University Press 2011. All rights reserved.
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Chapter 6
Static Testing
Objectives
• Static testing also improves the software quality.
• There are bugs which are detectable only through static testing.
• There are 3 types of static testing: Inspection, Walkthroughs and
Reviews
• Inspections are the most widely used technique for static testing
which is a formal process to detect the bugs at early stage.
• Benefits and effectiveness of inspection process
• Variants of Inspection process
• Walkthrough is a less formal and less rigorous method as
compared to inspection.
• Review is higher level technique as compared to inspection or
walkthrough, as it also includes management.

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Static Testing
• Static testing techniques do not demonstrate that the software is
operational or one function of software is working;
• They check the software product at each SDLC stage for
conformance with the required specifications or standards.
Requirements, design specifications, test plans, source code,
user’s manuals, maintenance procedures are some of the items
that can be statically tested.
• Static testing has proved to be a cost-effective technique of error
detection.
• Another advantage in static testing is that a bug is found at its
exact location whereas a bug found in dynamic testing provides
no indication to the exact source code location.

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Evolution of Software Testing
Types of Static Testing
• Software Inspections
• Walkthroughs
• Technical Reviews
Static Testing

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Inspections
• Inspection process is an in-process manual examination of an item
to detect bugs.
• Inspection process is carried out by a group of peers. The group of
peers first inspects the product at individual level. After this, they
discuss potential defects of the product observed in a formal
meeting.
• It is a very formal process to verify a software product. The
documents which can be inspected are SRS, SDD, code and test
plan.

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• Inspection process involves the interaction of the following
elements:
• Inspection steps
• Roles for participants
• Item being inspected
Inspections

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Inspection Team
• Author / Owner / Producer
• Inspector
• Moderator
• Recorder
Inspections

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Inspection Process

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Software Testing Myths
Benefits of Inspection Process
• Bug Reduction
• Bug Prevention
• Productivity
• Real-time Feedback to Software Engineers
• Reduction in Development Resource
• Quality Improvement
• Project Management
• Checking Coupling and Cohesion
• Learning through Inspection
• Process Improvement
Inspection Process

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Variants of Inspection process

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Active Design Reviews

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Formal Technical Asynchronous
review method (FTArm)

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Gilb Inspection

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Humphrey’s Inspection Process

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N-Fold Inspection

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Reading Techniques
• A reading technique can be defined as a series of steps or
procedures whose purpose is to guide an inspector in acquiring a
deep understanding of the inspected software product.
• Ad-hoc Method
• Checklists
• Scenario based Reading

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Scenario based Reading
Perspective based Reading
• software item should be inspected from the perspective of
different stakeholders Inspectors of an inspection team have to
check software quality as well as the software quality factors of
a software artifact from different perspectives.
Usage based Reading
• This method given is applied in design inspections. Design
documentation is inspected based on use cases, which are
documented in requirements specification.
Abstraction driven Reading
• This method is designed for code inspections. In this method,
an inspector reads a sequence of statements in the code and
abstracts the functions these statements compute.

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Task driven Reading
• This method is also for code inspections . In this method, the
inspector has to create a data dictionary, a complete description of
the logic and a cross-reference between the code and the
specifications.
Function-point based Scenarios
• The scenarios, designed around function-points are known as the
Function Point Scenarios. A Function Point Scenario consists of
questions and directs the focus of an inspector to a specific
function-point item within the inspected requirements document.

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Task driven Reading
• This method is also for code inspections . In this method, the
inspector has to create a data dictionary, a complete description of
the logic and a cross-reference between the code and the
specifications.
Function-point based Scenarios
• The scenarios, designed around function-points are known as the
Function Point Scenarios. A Function Point Scenario consists of
questions and directs the focus of an inspector to a specific
function-point item within the inspected requirements document.

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It is a less formal and less rigorous technique as compared to
inspection. The very common term used in the literature for static
testing is Inspection but it is for very formal process. If you want to
go for a less formal having no bars of organized meeting, then
walkthroughs are a good option.
Structured Walkthroughs

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Coordinator
Presenter/developer
Recorder
Reviewer
Maintenance
Standrds Bearer
User Represntative
Structured Walkthroughs team

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Technical Reviews
A review is similar to an inspection or walkthrough, except that the
review team also includes management. Therefore, it is considered a
higher-level technique than inspection or walkthrough.
A technical review team is generally comprised of management-level
representatives of the User and Project Management. Review agendas
should focus less on technical issues and more on oversight than an
inspection.

2.1_Static Testing_Devops_SDLC_guide_to_everything.ppt

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