Software Engineering Tutorials

Home| Forums | Join Google Group | Join Yahoo Group | Jobs

Earn Money
Trading Forex Online
  Paramount Airways
  Free Data Recovery
Cargo
Job Portal
  HSBC Investment
Management
Cheap Web Hosting
  Make Trip
  Cheap Air Travel
Leisure Hotel
  Free Air Travel
  Mutual Fund Informations
Cheapest Cellular Plan
Free Sexy Indians
  Call Center Software
  Hot Indian

Software Engineering Tutorials

1. Condition testing o exercises the logical conditions in a program. 2. Data flow testing o selects test paths according to the locations of definitions and uses of variables in
the program. Black Box Testing
Introduction Black box testing attempts to derive sets of inputs that will fully exercise all the functional
requirements of a system. It is not an alternative to white box testing. This type of testing attempts to find errors in the following categories: 1. incorrect or missing functions, 2. interface errors, 3. errors in data structures or external database access, 4. performance errors, and 5. initialization and termination errors. Tests are designed to answer the following questions: 1. How is the function's validity tested? 2. What classes of input will make good test cases? 3. Is the system particularly sensitive to certain input values? 4. How are the boundaries of a data class isolated? 5. What data rates and data volume can the system tolerate? 6. What effect will specific combinations of data have on system operation? White box testing should be performed early in the testing process, while black box testing tends
to be applied during later stages. Test cases should be derived which 1. reduce the number of additional test cases that must be designed to achieve reasonable testing, and 2. tell us something about the presence or absence of classes of errors, rather than an error associated only with the specific test at hand. Equivalence Partitioning This method divides the input domain of a program into classes of data from which test cases can
be derived. Equivalence partitioning strives to define a test case that uncovers classes of errors
and thereby reduces the number of test cases needed. It is based on an evaluation of equivalence
classes for an input condition. An equivalence class represents a set of valid or invalid states for
input conditions. Equivalence classes may be defined according to the following guidelines: