UCF EEL 6883 - Software Testing (23 pages)

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Software Testing



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Software Testing

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Pages:
23
School:
University of Central Florida
Course:
Eel 6883 - Software Engineering II
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Software Engineering 2 Software Testing Claire Lohr pp 413 Presented By Feras Batarseh Definition IEEE 610 12 An activity in which a system or component under specified conditions the results are observed or recorded and an evaluation is made of some aspect of the system or component Attributes Software engineer intuition and experience Specification Code Dataflow Fault Usage Nature of the application Types of Testing Equivalence class partitioning Boundary value Decision table Exploratory Operational profile Equivalence class partitioning According to two attributes Valid Invalid Example age 0 120 valid age 0 and 120 Invalid Steps for ECP Define valid and invalid values Test as many valid classes together Do one test for each invalid class Boundary value Must test the following Legally defined minimum Legally defined maximum The first possible value below the legally min The first possible value above the legally max Age ex 0 120 1 121 Decision table Lists all conditions and all resultant outputs Y yes N no 1 yes and no Exploratory testing Emphasizing planning the focus of the testing process Doesn t require pre planning When test begins modifications are still allowed Test results modify the plan accordingly Operational profile Number of tests to be done follows the model of how much it is used during operation Test more for features that are used more Testing Levels Levels vary from organization to organization and from project to project Some parameters Size Complexity Safety criticality Experience of staff Desire for certification ISO CMMI Testing Levels cont Operational testing Software units DB integrated components requirements and integration Maintenance process modified and un modified parts migration verification parallel testing all development levels for improvements Supporting process Verification and validation Testing strategies Testing all combinations is impossible Macro Time to market Amount of functionality to be delivered Quality of product Micro More automation to speed process Better selection of test cases Less turnovers in testing staff Testing strategies cont For functionality changes Tracing requirements to see cases affected by changes Modular testing For quality of product More variety in types Better tools Better unit test tools for developers Testing strategies cont 2 To control test effort cost PM tool for estimations Add root cause analysis Test Design Art and science Structured Boundary value Decision table Equivalence class partitioning Un structured Random Ad hoc Exploratory Test Coverage of code Impossible to cover all the code Depends on the definition of covering Does it mean executing reading testing Use Tom McCabe s basis technique Tom McCabe s basis technique 1 Draw a flow graph nodes and edges 2 Compute the metric cyclomatic complexity nodes No edges no Nodes 2 cc 3 Choose paths cover all nodes and edges Test Execution Defined in a test plan Pseudo code and flow graph Cover all specifications is important categorize according to testable or not Define components hardware software personnel data automated tools Testing documentation Media vary depending on level of detail Word doc Spread sheets Databases Within automated test tools IEEE Testing documentation Test plan Test design Test cases Test procedures Test logos Incident reports Test summary report Test item transmittal report Test management Estimating schedules Planning for staffing and training Identifying and planning tasks Monitoring the execution of the plans and re planning based on results Any questions Thank You for your attention


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