Testing Principles

Question 1

Testing Principles

Answer 1

1. early testing
2. exhaustive testing is impossible
3. testing is context dependant
4. pesticide paradox
5. testing shows presence of defeats
6. defects clustering
7. absence of errors fallacy

Question 2

Principle #1 - Early Testing

Answer 2

• finds bugs early

- manageable issues

Question 3

Principle 2# - Exhaustive Testing is Impossible

Answer 3

Testing everything is not feasible

Question 4

Principle 3# - Testing is context dependant

Answer 4

testing is done differently in different contexts,

different prioritisations and risk

Question 5

Principle 4# - Pesticide Paradox

Answer 5

if tests are done over and over again, they become ineffective

Question 6

Principle #5 - Testing shows presence of defects

Answer 6

it can show that defects are present, but it cannot prove that there are no more defects

it will miss some!

Question 7

Principle 6- defect clustering

Answer 7

focus of clusters of bugs. known or expected bugs, this will be from complex features

Question 8

Principles 7- Absence of error fallacy

Answer 8

fixing defects doesn’t not help, if the system is still unusable and doesn’t fit the users needs and expectations