(c) Dr.Wolfgang J. Schneider

(c) Dr.Wolfgang J. Schneider 2003 - 2008 - www.drschneider.at
COVERAGE – HOMEWORK Apply this lesson to the structure on the left (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Case # 1 will cover this part (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Case # 2 will cover this part I have dropped the redundant branches (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Case # 3 will cover this part I have dropped the redundant branches (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK For a system with a moderate risk this is a fairly good coverage (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK We have 100% Code Coverage We have missed only one Branch And we have missed one single condition (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK It’s already getting obvious that we will need a more systematic approach for a structure like this. First, we will set up a table for the conditions (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 TRUE 02 FALSE 03 04 05 06 07 08 09 10 11 12 13 14 15 16 (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Now, we will insert our 3 cases into the table. Case 1: Condition 1: TRUE Condition 2: TRUE OOPS Condition 3: (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Conditions 3 and 4 will not change the outcome of test case # 1 (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 TRUE 02 1.2 FALSE 03 1.3 04 1.4 05 06 07 08 09 10 11 12 13 14 15 16 (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Let’s continue with case 2 Condition 1: FALSE Condition 2: Aha !! Condition 3: TRUE Condition 4: TRUE (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Condition 2 does not matter I have dropped the redundant branches (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 TRUE 02 1.2 FALSE 03 1.3 04 1.4 05 06 07 08 09 2.1 10 11 12 13 2.2 14 15 16 (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Case 3: FALSE Irrelevant (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 TRUE 02 1.2 FALSE 03 1.3 04 1.4 05 06 07 08 09 2.1 10 11 12 3.1 13 2.2 14 15 16 3.2 (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Let’s add a case to cover this branch and the FALSE value for condition 2 It’s obvious that condition 3 won’t matter (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK I will use TRUE FALSE Irrelevant (because this case Has more power than the FALSE value) (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK More Power ? I am triggering this procedure (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 - red TRUE 02 1.2 - red FALSE 03 1.3 - red 04 1.4 - red 05 4.1 - yellow 06 07 4.2 - yellow 08 09 2.1 - blue 10 11 12 3.1 - green 13 2.2 - blue 14 15 16 3.2 - green (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Before we continue, we should complete the path lines. We did not need them for branch and condition coverage. (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK I added the “weaker” path we talked about. You can see that the drawing is getting pretty overloaded. We cannot be sure if we covered all the paths just by looking at the graphic. (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Of course, some things are obvious: The red path is pretty isolated There is an undefined path supposed to switch over from GREEN to YELLOW/BLUE (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 - red TRUE 02 1.2 - red FALSE 03 1.3 - red 04 1.4 - red 05 4.1 - yellow 06 5.1 - mauve 07 4.2 - yellow 08 5.2 - mauve 09 2.1 - blue 10 11 12 3.1 - green 13 2.2 - blue 14 15 16 3.2 - green There is an undefined path supposed to switch over from GREEN to YELLOW/BLUE The red path is pretty isolated (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 - red TRUE 02 1.2 - red FALSE 03 1.3 - red 04 1.4 - red 05 4.1 - yellow 06 5.1 - mauve 07 4.2 - yellow 08 5.2 - mauve 09 2.1 - blue 10 11 6.1 - orange 12 3.1 - green 13 2.2 - blue 14 15 6.2 orange 16 3.2 - green Let’s call it #6 and paint it in orange (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Voilà (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 - red TRUE 02 1.2 - red FALSE 03 1.3 - red 04 1.4 - red 05 4.1 - yellow 06 5.1 - mauve 07 4.2 - yellow 08 5.2 - mauve 09 2.1 - blue 10 11 6.1 - orange 12 3.1 - green 13 2.2 - blue 14 15 6.2 orange 16 3.2 - green Something is still missing (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Cond-1 is FALSE We can exclude this part Cond-2 is irrelevant Cond-3 is TRUE We missed the fact that there is no switch-over from BLUE to GREEN because MAUVE is running along most of this path (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK BLACK follows BLUE Now we join MAUVE Now BLUE leaves us (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK VAR CASE cond-1 cond-2 cond-3 cond-4 01 1.1 - red TRUE 02 1.2 - red FALSE 03 1.3 - red 04 1.4 - red 05 4.1 - yellow 06 5.1 - mauve 07 4.2 - yellow 08 5.2 - mauve 09 2.1 - blue 10 7.1 - black 11 6.1 - orange 12 3.1 - green 13 2.2 - blue 14 7.2 - black 15 6.2 orange 16 3.2 - green (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK We needed 3 cases to obtain Statement Coverage (Anweisungsüberdeckung) We had to add 1 case to obtain Branch Coverage (Zweigüberdeckung) Branch Coverage is stronger than (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK The additional case we introduced for Branch Coverage also gave us SIMPLE CONDITION COVERAGE (Einfache Bedingungsüberdeckung) We introduced BRANCH CONDITION TESTING Branch Coverage goes with Condition Coverage (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK We need another 3 cases to obtain Path Coverage (Pfadüberdeckung) Path Coverage is stronger than Branch Coverage (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK We needed only 7 out of 16 possible condition combinations to obtain Path Coverage You will always get full Path Coverage out of the Condition Matrix (c) Dr.Wolfgang J. Schneider

COVERAGE – HOMEWORK Your Test Manager will rip your head off if you run those 16 cases when you were supposed to obtain 100% Statement Coverage (c) Dr.Wolfgang J. Schneider

Dr. Wolfgang J. Schneider - Start
DR. WOLFGANG J. SCHNEIDER GMBH International Information Technology Consultants Professional Testing Solutions Telecommunications and Utility Billing Systems Euro Preparation for Companies in New EU Member Countries EDIFACT – DATANORM – ELDANORM – ETIM Interfaces Data Exchange with Banks and Credit Card Companies Total Quality Management – Good Manufacturing Practices IT Service Management - IT Infrastructure Library (ITIL) Knowledge Management Solutions IT Fitness for GAAP – IAS – FASB Balanced Scorecard Dr. Wolfgang J. Schneider - Start (c) Dr.Wolfgang J. Schneider Take Advantage of 30+ Years of IT Experience !

(c) Dr.Wolfgang J. Schneider

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