Testing - Tutorial10Testing Introduction to Software...

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1 Tutorial 10- Testing Introduction to Software Engineering 2006-2007 2nd term
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2 Summary Classification of faults. Test organization. Test implementation.
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3 Faults What is failure? Usually, we mean that the software does not do what the requirements describe. What causes the failures? Types of faults.
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4 Reasons that cause faults  Wrong/missing specification Impossible to implement the spec. The system design may contain a fault. The program design may contain a fault. The program code may be wrong. It may implement the algorithm improperly or incompletely.
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5 Types of faults: After coding the program components, we usually examine the code to eliminate them right away. It is important to know what kind of faults we are seeking. An algorithmic fault. Computation and precision faults Stress or overload faults. Throughput or performance faults. Capacity or boundary faults Timing or coordination faults. Documentation faults. Recovery faults. Hardware and system software faults. Standards and procedure faults.
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6 2. Test organization- test process Component testing Testing of individual program components; Usually the responsibility of the component developer (except sometimes for critical systems); Tests are derived from the developer’s experience.
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