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user acceptance test

The final testing stages by users of a new or changed information system. If successful, it signals the approval to implement the system live. Cosmetic and other small changes may still be required as a result of the test, but the system is considered stable and processing data according to requirements. See testing types.

testing types

Following is a summary of the various tests that are performed on new and revised hardware and software. Testing is a critical part of the development of internal information systems as well as commercial software, and it is often not given the attention it deserves.

Software vendors that provide critical infrastructure such as operating systems have managed to relegate a great amount of testing to thousands of their users, who, looking forward to improvements in the next version of the critical products they use, are more than willing to try out buggy software and report problems.

Following is a summary in alphabetical order of the types of testing that are performed.

Acceptance Test
The test performed by users of a new or changed system in order to approve the system and go live. See user acceptance test.

Active Test
Introducing test data and analyzing the results. Contrast with "passive test" (below).

Ad Hoc Test
Informal testing without a test case.

Age Test (aging)
Evaluating a system's ability to perform in the future. To perform these tests, hardware and/or test data are modified to a future date.

Alpha Test
The first testing of a product in the lab. Then comes beta testing. See alpha test.

Automated Test
Using software to test software. Automated tests may still require human intervention to monitor stages for analysis or errors.

Beta Test
Testing by end users. Follows alpha testing. See beta test.

Black Box Test
Testing software based on output only without any knowledge of its internal code or logic. Contrast with "white box test" and "gray box test."

Dirty Test
Same as "negative test."

Environment Test
A test of new software that determines whether all transactions flow properly between input, output and storage devices. See environment test.

Functional Test
Testing functional requirements of software, such as menus and key commands. See functional test.

Fuzz Test
Testing for software bugs by feeding it randomly generated data. See fuzz testing.

Gray Box Test
Testing software with some knowledge of its internal code or logic. Contrast with "white box test" and "black box test."

Negative Test
Using invalid input to test a program's error handling.

Passive Test
Monitoring the results of a running system without introducing any special test data. Contrast with "active test" (above).

Recovery Test
Testing a system's ability to recover from a hardware or software failure.

Regression Test
To test revised software to see if previously working functions were impacted. See regression testing.

Smoke Test
Turn it on and see what happens. See smoke test.

System Test
Overall testing in the lab and in the user environment. See alpha test and beta test.

Test Case
A set of test data, test programs and expected results. See test case.

Test Scenario
A set of test cases. See test scenario.

Test Suite
A collection of test cases and/or test scenarios. See test suite.

Unit Test
A test of one component of the system. Contrast with "system test."

User Acceptance Test (UAT)
See "acceptance test" above.

White Box Test
Testing software with complete knowledge of its internal code and logic. Contrast with "black box test" and "gray box test."

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