Software Testing - Statement and decision coverage

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Software Testing | Question 236 of 266

Statement and decision coverage

Consider the following:
Pick up and read the newspaper
Look at what is on television
If there is a program that you are interested in watching then switch the television on and watch the program
Otherwise
Continue reading the newspaper
If there is a crossword in the newspaper then try and complete the crossword

a) SC = 1 and DC = 1
b) SC = 1 and DC = 2
c) SC = 1 and DC = 3
d) SC = 2 and DC = 2
e) SC = 2 and DC = 3

SC=Statement coverage DC=Decision coverage

Total Answers and Comments: 3

Last Update: February 12, 2009 Asked by: RM32306

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Best Rated Answer

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Submitted by: Cryptic_sumon

Statement Coverage is a traditional terget. Its deifne the coverage terget in Control flow Graph and write test cases to achive it. For example, Supose that we write and execute two test cases.

if 5=true than go to 6
//else if 5=false than go to 7

Test1: Follow paths 1-2-Exit
Test2: Follow paths 1-2-3-4-5-6-8-2-3-4-5-6-8-2-Exit.
here we can see in the test 2, we execute 2 loops and both time takes the true braches. and skips the false braches. so node number 6 is not executed so its not 100% statement coverrage

Otherhand The decision coverage is predicate nodes which always check condition for branching. As an example we can use "if and else" "do while" and "switch " etc to coverage conditional branching to achive we need to write tests cases and execute it.

Above answer was rated as good by the following members:
hirenmistry, sharmiprakash

February 19, 2008 03:57:23

Cryptic_sumon

Member Since: February 2008 Contribution: 3

RE: Statement and decision coverage

Statement Coverage is a traditional terget. Its deifne the coverage terget in Control flow Graph and write test cases to achive it. For example Supose that we write and execute two test cases.

if 5 true than go to 6
//else if 5 false than go to 7

Test1: Follow paths 1-2-Exit
Test2: Follow paths 1-2-3-4-5-6-8-2-3-4-5-6-8-2-Exit.
here we can see in the test 2 we execute 2 loops and both time takes the true braches. and skips the false braches. so node number 6 is not executed so its not 100 statement coverrage

Otherhand The decision coverage is predicate nodes which always check condition for branching. As an example we can use "if and else" "do while" and "switch " etc to coverage conditional branching to achive we need to write tests cases and execute it.

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