Slides 10 Test Case Selection

Question 1

Properties of test cases

Answer 1

● representative
● error sensitive
● low redundancy
● economical

Question 2

Black Box

Answer 2

● Function coverage
Every specified function is executed at least once
(Jede angegebene Funktion wird mindestens einmal ausgeführt)

● Input coverage
Every input value is used in at least in one test case

● Output coverage
Every output situation is created at least once.

Question 3

Glass-box test coverages

Answer 3

● statement coverage
● branch coverage
● path coverage

Question 4

Internal structure of Glass-Box Testing

Answer 4

● control flow

● data flow

Question 5

Test Case Selection Criterion (TCSC)

Answer 5

A TCSC defines for a given program , implementing its specification, a setof conditions which the set of test cases has to meet.

Question 6

Reliability (Verlässlichkeit)

Answer 6

A TCSC is reliable if all sets of test cases fulfilling the TCSC discover the same set of errors.
(Ein TCSC ist zuverlässig, wenn alle Sätze von Testfällen, die den TCSC erfüllen, denselben Satz von Fehlern entdecken.)

Question 7

Validity

Answer 7

A TCSC is valid if there is for each error at least one set of test cases fulfilling the TCSC.
(Ein TCSC ist gültig, wenn es für jeden Fehler mindestens einen Satz von Testfällen gibt, die den TCSC erfüllen.)

Question 8

Test Adequacy

Answer 8

A program P is adequately tested regarding a defined TCSC iff the set of test cases fulfilling the TCSC discovers no error in P.
(Ein Programm P ist hinsichtlich eines definierten TCSC hinreichend getestet, wenn die Menge der Testfälle, die den TCSC erfüllen, keinen Fehler in P entdeckt.)

Question 9

Important Test Adequacy Criterion (TAC)

Answer 9

● Specification-based TACs

● Program-based TACs

Question 10

Program-based TAC

Answer 10

They can be used to
● recognize both strong and weak adequacy criteria
● focus attention on the properties that an effective test data adequacy criterion should exhibit
● select an appropriate criterion for the item under test

Question 11

TAC Properties

Answer 11

1. Applicability
2. Non-exhaustive Applicability
3. Monotonicity
4. Inadequate Empty Set
5. Antiextensionality
6. General Multiple Change
7. Antidecomposition
8. Anticomposition
9. Renaming
10. Complexity
11. Statement Coverage

Question 12

Model-based Testing

Answer 12

software testing in which test cases are derived in whole or in part from a model that describes some (usually functional) aspects of the system under test (SUT).

Question 13

Examples of test models

Answer 13

● Glass-box testing: control flow graph

● State transition testing: state diagram

● Combinatorial testing: input parameter model