First Look At White Box Testing

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First Look At White Box Testing
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• Index
• White Box Test
• The most important principles that support you in
  the successful execution of white box tests
• White Box testing procedure is applicable to the
  following levels of software testing
• Advantage
• Disadvantage
• Exltechs Software Test Training Program

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(No Transcript)
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White Box Test white box testing uses specific
knowledge of the programming code to investigate
outputs. The tests is accurate if the tester
knows what the program is supposed to do. He or
she can then see whether the program differs from
his or her intended goal. White box testing does
not take into account errors due to omission, and
all visible code must also be readable. A deep
understanding of the system or component is
possible if the tester understands this to
program or code level. Almost all the time, the
tester must therefore either understand or have
access to the source code of the system usually
in the Form of specification documents.
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The most important principles that support you in
the successful execution of white box tests are
It ensure that each line of code is tested.
Branch Coverage- It ensure that each branch
(for example, true or false) is tested.
Path coverage-make sure that all possible paths
are tested. A software Testing technique is also
known as glass box, structural, clear box and
open box Tests, white box Tests
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White Box testing procedure is applicable to the
following levels of software testing Unit
Testing for testing paths within a unit.
Integration test for testing paths between
units. System test for Test paths between
subsystems.
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UNIT TESTING is a software test in which
individual units/ components of a software are
tested. The purpose is to verify that each unit
of the software performs as designed. One unit is
the smallest testable part of any software. It
usually has one or more inputs and usually a
single output. In procedural programming a unit
may be an individual program, a function, a
procedure, etc. In object-oriented programming,
the smallest unit is a method, which may belong
to a base/ super class, abstract class or
derived/ child class.
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Advantage Tests can be started at an
earlier stage. You don't have to wait until the
GUI is available. Tests are more thorough,
with the ability to cover most paths. Disadvantage
Because tests can be very complex, highly
qualified resources are required, with thorough
knowledge of programming and implementation.
Maintenance of test scripts can be a burden if
the implementation changes too often.
Because this test method is closely linked to the
application to be tested, tools cannot be readily
available for any type of implementation/platform.
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Integration Test Test for detecting
defects at the interfaces and in the Interactions
between integrated components or systems. See
also component integration testing, system
integration tests. system testing Testing
the integration of systems and packages
testing Interfaces to external organisations
(e.g. electronic data exchange, Internet).
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