When a tester executes a test and observes behaviour that differs from the specification, this is called a: a) defect b) error c) failure d) mistake e) fault Which of the following best describes regression testing? v) Testing to ensure unchanged areas still work w) Testing after a fix x) Testing after environment changes y) Testing after code refactoring z) Testing only at the end of the project a) v, w & y are true b) v & w are true c) v, w, x & y are true d) w & z are true e) all are true Which of the following is NOT included in IEEE 829 test documentation? a) Test summary report b) Test design specification c) Test incident report d) Test risk assessment e) Test log Testing should be stopped when: a) All planned tests are executed b) The exit criteria have been met c) No more defects are being found d) Time runs out e) Both b and c ...
Equivalence Partitioning
Equivalence partitioning uses a model of the component that partitions the input and output values of the component. The input and output values are derived from the specification of the component's behaviour.
The model shall comprise partitions of input and output
values. Each partition shall contain a
set or range of values, chosen such that all the values can reasonably be
expected to be treated by the component in the same way (i.e. they may be
considered 'equivalent'). Both valid and
invalid values are partitioned in this way.
Test cases shall be designed to exercise
partitions. A test case may exercise any
number of partitions. A test case shall
comprise the following:- the input(s) to the component:
- the partitions exercised:
- the expected outcome of the test case.
Test cases are designed to exercise partitions of valid values, and invalid input values. Test cases may also be designed to test that invalid output values cannot be induced.
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ReplyDelete"Equivalence partitioning (also called Equivalence Class Partitioning or ECP[1]) is a software testing technique that divides the input data of a software unit into partitions of data from which test cases can be derived. In principle, test cases are designed to cover each partition at least once. This technique tries to define test cases that uncover classes of errors, thereby reducing the total number of test cases that must be developed.An advantage of this approach is reduction in the time required for testing a software due to lesser number of test cases"
ReplyDeleteSource: http://en.wikipedia.org/wiki/Equivalence_partitioning