Test Types – D, E, F

Test Type
A particular type of testing that has an approach, goal and/or use of oracle(s) that provides information that is typical to that test type.

This is the third post in a (sub) series on Test Types. This post covers test types beginning with D, E and F. Please add any additions or remarks in the comment section.

Data integrity testing
Data integrity testing focusses on the verification and validation that the data within an application and its databases remains accurate, consistent and retained during its lifecycle while it is processed (CRUD), retrieved and stored.
I fear this is an area of testing that is often overlooked. While it gets some attention when functionality is tested initially, the attention on the behavior of data drops over time.

Dependency testing
Examines an application’s requirements for pre-existing software, initial states and configuration in order to maintain proper functionality.

Destructive testing
Test to determine the softwares or its individual components or features point of failure when put under stress.
This seems very similar to Load Testing but I like the emphasis on individual stress points.

Development testing
It is an existing term with its own Wikipedia page but it doesn’t bring anything useful to software testing as such.

Documentation testing
Testing of documented information, definitions, requirements, procedures, results, logging, test cases, etc.

Dynamic testing
Testing the dynamic behavior of the software.
Almost all testing falls under this definition. So in practice a more specific identification of a test type should be chosen.

End-to-End testing
Testing the workflow of a single system or a chain of systems with regard to its inputs, outputs and processing  of these with regard to its availability, capacity, compatibility, connectivity,  continuity, interoperability, modularity, performance, reliability, robustness, scalability, security, supportability and traceability.
While in theory end-to-end testing seems simple. Enter some data and check that it is processed and handed over throughout all systems until the end of the chain. In practice end-to-end testing is very difficult. The long list of quality characteristics mentioned above serves as an indication of what could go wrong along the way.

Endurance testing
Endurance is testing the ability to handle continuous load under normal conditions and under difficult/unpleasant conditions over some longer period of duration/time.

Error handling testing
Use specific input or behavior to generate known, and possibly unknown, errors.
Documented error and of exception handling is a great source to use for test investigations. It shows often undocumented requirements and business logic. It also interesting to see if the exception and errors occur based upon the described situation.

Error guessing
Error guessing is based on the idea that experienced, intuitive or skillful tester are able to find bugs based on their abilities and that it can be used next the use of more formal techniques.
As such one could argue that it is not as much a test type as it is an approach to testing. 

Exploratory testing
Exploratory testing is a way of learning about and investigating a system through concurrent design, execution, evaluating, re-design and reporting of tests with the aim to find answers to currently known and currently as yet unknown question who’s answers enable individual stakeholders to take decisions about the system.
Exploratory testing is an inherently structural approach to testing that seeks to go beyond the obvious requirements and uses heuristics and oracles to determine test coverage areas and test ideas and to determine the (relative) value of test results. Exploratory testing is often executed on the basis of Session Based Test Management using charter based and time limited sessions.
It is noteworthy that, in theory at least, all of the test types mentioned in this series could be part of exploratory testing if deemed appropriate to use. 

Failover testing
Failover testing investigates the systems ability to successfully failover, recover or re-allocate resources from hardware, software or network malfunction such that no data is lost, data integrity is intact and no ongoing transactions fail.

Fault injection testing
Fault injection testing is a method in which hardware faults, compile time faults or runtime faults are ‘injected’ into the system to validate its robustness.

Functional testing
Functional testing is testing aimed to verify that the system functions according to its requirements.
There are many definitions of functional testing and the one above seems to capture most. Interestingly some definitions hint that testing should also aim at covering boundaries and failure paths even if not specifically mentioned in the requirements. Other mention design specifications, or written specifications. For me functional testing initially is conform the published requirements and than to investigate in which way this conformity could be broken. 

Fuzz testing
Fuzz testing or fuzzing is a software testing technique, often automated or semi-automated, that involves providing invalid, unexpected, or random data to the inputs of a computer program. The program is then monitored for exceptions such as crashes, or failing built-in code assertions or for finding potential memory leaks.
Yes this is more or less the Wikipedia definition. 

One thought on “Test Types – D, E, F

  1. Pingback: Five Blogs – 29 January 2016 | 5blogs

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