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Types of Testing - Page 1


Black box testing - not based on any knowledge of internal design or code. Tests are based on requirements and functionality.

White box testing - based on knowledge of the internal logic of an application's code. Tests are based on coverage of code statements, branches, paths, conditions.

Unit testing - Unit is the smallest compilable component. A unit typically is the work of one programmer.This unit is tested in isolation with the help of stubs or drivers.Typically done by the programmer and not by testers.

Incremental integration testing - continuous testing of an application as new functionality is added; requires that various aspects of an application's functionality be independent enough to work separately before all parts of the program are completed, or that test drivers be developed as needed; done by programmers or by testers.

Integration testing - testing of combined parts of an application to determine if they function together correctly. The 'parts' can be code modules, individual applications, client and server applications on a network, etc. This type of testing is especially relevant to client/server and distributed systems.

Functional testing - black-box testing aimed to validate to functional requirements of an application; this type of testing should be done by testers.

System testing - black-box type testing that is based on overall requirements specifications; covers all combined parts of a system.

End-to-end testing - similar to system testing but involves testing of the application in a environment that mimics real-world use, such as interacting with a database, using network communications, or interacting with other hardware, applications, or systems if appropriate. Even the transactions performed mimics the end users usage of the application.

Sanity testing - typically an initial testing effort to determine if a new software version is performing well enough to accept it for a major testing effort. For example, if the new software is crashing systems every 5 minutes, bogging down systems to a crawl, or destroying databases, the software may not be in a 'sane' enough condition to warrant further testing in its current state.

Smoke testing - The general definition (related to Hardware) of Smoke Testing is:
Smoke testing is a safe harmless procedure of blowing smoke into parts of the sewer and drain lines to detect sources of unwanted leaks and sources of sewer odors.
In relation to software, the definition is Smoke testing is non-exhaustive software testing, ascertaining that the most crucial functions of a program work, but not bothering with finer details.

Static testing - Test activities that are performed without running the software is called static testing. Static testing includes code inspections, walkthroughs, and desk checks

Dynamic testing - test activities that involve running the software are called dynamic testing.

Regression testing - Testing of a previously verified program or application following program modification for extension or correction to ensure no new defects have been introduced.Automated testing tools can be especially useful for this type of testing.

Acceptance testing - final testing based on specifications of the end-user or customer, or based on use by end-users/customers over some limited period of time.

Load testing -Load testing is a test whose objective is to determine the maximum sustainable load the system can handle. Load is varied from a minimum (zero) to the maximum level the system can sustain without running out of resources or having, transactions suffer (application-specific) excessive delay.

Stress testing - Stress testing is subjecting a system to an unreasonable load while denying it the resources (e.g., RAM, disc, mips, interrupts) needed to process that load. The idea is to stress a system to the breaking point in order to find bugs that will make that break potentially harmful. The system is not expected to process the overload without adequate resources, but to behave (e.g., fail) in a decent manner (e.g., not corrupting or losing data). The load (incoming transaction stream) in stress testing is often deliberately distorted so as to force the system into resource depletion.
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