Failure testing finds a system’s reliability, and how each component of a system will react when the modules it depends on are not available. There are benefits that can result from performing this type of testing, particularly for “Software as a Service” (SAAS) applications that have 24/7 up-time requirements, including:
- Identifying all internal and external system dependencies.
- Documenting “Standard Operating Procedures” for observing and troubleshooting production issues.
- Documenting system-failure points and their effect on the system.
It is the inability of an application/component to perform required function according to its specification.
It is a condition that causes the software is not working as per the requirement.
Fault injection Testing
Software fault injections are basically used to cross verify the code coverage done by the tests. If a set of test data is run on the code and all of them pass it will be definitely not mean that the code is 100% bug free. There may be some reason that given the data, some part of the code is not reachable. In this case, the code is modified to see if it still works as expected. For example, if there a field which accepts only positive number and there is a requirement that on entering negative values error should be displayed.
The way for which there exists a set of input values and preconditions that allow it to be executed.
Feature testing verifies the features provided by the software and are conducted in the following steps:
- Each operation in the software should executed once.
- Each operation is checked for its proper execution
- Interaction between the two operations is reduced and
Functional decomposition is a business analysis technique for breaking down a “business operation” into functional components.A Functional Decomposition Diagram (FDD) shows a hierarchical organization of the business functions that comprise the business operation.
Functional Testing is a method done against the business requirements of application. It comes under a black box type of testing. It involves the complete integration system to evaluate the system’s compliance with its requirements. Based on the functional specification document this type of testing is to be carried out. In actual testing, testers need to verify a function of the code.
The functional requirement is describing the behavior of the system as it relates to the system's functionality.
Fuzz testing is a testing method used to discover coding errors and security loopholes in software, OS by inputting more amounts of random data, called fuzz, to the system in an attempt to make it crash.