Statement Testing and Statement Coverage. ISTQB whitebox techniques with TestCompetence
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The document discusses statement testing and statement coverage. It defines statement testing as designing test cases to execute statements, and statement coverage as the percentage of executable statements executed by a test suite. It provides examples of how to calculate the number of test cases needed to achieve statement coverage for different code structures like IF/ELSE, SWITCH, WHILE, etc. It also mentions a tool called TestCompetence that can generate pseudocode examples to practice whitebox testing techniques like statement coverage.
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Statement Testing and Statement Coverage. ISTQB whitebox techniques with TestCompetence
- 1. Statement Testing and Statement Coverage with Prepare yourself for the ISTQB exam
- 2. Dictionary statement: an entity in a programming language, which is typically the smallest indivisible unit of execution. statement testing: a white box test design technique in which test cases are designed to execute statements. statement coverage: the percentage of executable statements that have been exercised by a test suite. executable statement: a statement which, when compiled, is translated into object code, and which will be executed procedurally when the program is running and may perform an action on data. code coverage: an analysis method that determines which parts of the software have been executed (covered) by the test suite and which parts have not been executed, e.g. statement coverage, decision coverage or condition coverage. From „Standard glossary of terms used in Software Testing” Copyright © 2013
- 3. What is…? Statement coverage is the assessment of the percentage of executable statements that have been exercised by a test case suite. Statement testing derives test cases to execute specific statements, normally to increase statement coverage. From „Certified Tester Foundation Level Syllabus (version 2011)” Copyright © 2013
- 4. Rules 100% branch coverage implies both 100% decision coverage and 100% statement coverage. From „Certified Tester Foundation Level Syllabus (version 2011)” Copyright © 2013
- 5. Examples with sequential code a = b + c d = e * e In order to cover all statements, you need 1 test case. Copyright © 2013
- 6. Examples with IF IF (wa) { ev = ghd - pkq / cds; In order to cover all } statements, you need 1 test case. Copyright © 2013
- 7. Examples with IF ELSE IF (weu) { i = o - f; In order to cover all } statements, you need ELSE 2 test cases. { u = gkt * k; } Copyright © 2013
- 8. Examples with SWITCH SWITCH (yc) { CASE 0: In order to cover all epl = o / c; statements, you need break; 4 test cases. CASE 1: p = wt * bd; break; CASE 2: fbt = xg + ana - cs; break; DEFAULT: qxn = q / ti; break; } Copyright © 2013
- 9. Examples with WHILE a = 1; WHILE (a < 5) { In order to cover all b = c; statements, you need a++; 1 test case. } Copyright © 2013
- 10. Examples with DO WHILE DO{ a = a + 1 } WHILE (a <= 0) In order to cover all statements, you need 1 test case. Copyright © 2013
- 11. Examples with FOR FOR (a = 5; a > -5; a--) { b = c + 1; In order to cover all } statements, you need 1 test case. Copyright © 2013
- 12. More examples IF (a) { b = c + d; In order to cover all } statements, you need ELSE 2 test cases. { IF (e) { b = c - d; } } Copyright © 2013
- 13. More examples IF (a) { IF (f) In order to cover all { statements, you need g = h - i; 2 test cases. } } ELSE { IF (e) { b = c - d; } } Copyright © 2013
- 14. More examples SWITCH (a) { CASE 0: IF (b) In order to cover all { statements, you need c; 3 test cases. } break; CASE 1: IF (d) { e; } ELSE { f; } break; } Copyright © 2012
- 15. More examples with… TestCompetence allows you to generate sample pseudocode to pracitse whitebox techniques including statement coverage… Copyright © 2013
- 16. More examples with… TestCompetence allows you to generate sample pseudocode to pracitse whitebox techniques including statement coverage… Choose the maximum number of Choose the instructions level of per level. nested statements. Choose the type of Choose the coverage type of from: statement. statement, decision, codition, multiple condition, GENERATE and modified your exercise. condition. Copyright © 2013
- 17. More examples with… You get pseudocode and sample answers just like during a regular ISTQB exam. Choose the right answer. Pseudocode Choose an answer. Copyright © 2013
- 18. More examples with… You get pseudocode and sample answers just like during a regular ISTQB exam. Choose the right answer. Pseudocode Your answer Right answer Copyright © 2013
- 19. How to get it… Visit TestCompetence.com and get one for only… EURO / USD Unlimited number of exercises during 24 hours! Copyright © 2013
- 20. Check also examples for… • Decision testing and coverage >> • Condition testing and coverage >> • Multiple condition testing and coverage >> • Modified condition decision combination (MC/CD) coverage >> Copyright © 2013