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The main advantage of a test fixture is that it allows for tests to be repeatable since each test is always starting with the same setup. Test fixtures also ease test code design by allowing the developer to separate methods into different functions and reuse each function for other tests. Further,
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It is considered bad practice when implicit test fixtures are too general, or when a test method sets up a test fixture and does not use it during the test. A more subtle issue is if the test methods ignore certain fields within the test fixture. Another bad practice is a test setup that contains
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Implicit setup places the test fixture in a setup method which is used to set up multiple test methods. This differs from delegate setup in that the overall setup of multiple tests is in a single setup method where the test fixture gets created rather than each test method having its own setup
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is considered "unsafe" when it modifies its fixture(s). An unsafe test case can render subsequent tests useless by leaving the fixture in an unexpected state. It also causes the order of tests to be important: a modified fixture must be reset if more tests are to be run after an unsafe test.
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Examples of fixtures include loading a database with a specific known set of data, erasing a hard disk and installing a known clean operating system installation, copying a specific known set of files, or the preparation of input data as well as set-up and creation of
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Mechanical holding apparatuses provide the clamping force via arms, wedges or eccentric wheel to the jaws. Additionally there are pneumatic and hydraulic fixtures for tensile testing that allow very fast clamping procedures and very high clamping forces.
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In-line setup creates the test fixture in the same method as the rest of the test. While in-line setup is the simplest test fixture to create, it leads to duplication when multiple tests require the same initial
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to initialize a database with known parameters before running a test. This allows for tests to be repeatable, which is one of the key features of an effective test framework.
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is a device used to consistently test some item, device, or piece of software. Test fixtures are used in the testing of electronics, software and physical devices.
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In testing electronic equipment such as circuit boards, electronic components, and chips, a test fixture is a device or setup designed to hold the
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test fixtures preconfigure tests into a known initial state instead of working with whatever was left from a previous test run.
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In the context of software a test fixture (also called "test context") is used to set up system state and input data needed for
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Delegate setup places the test fixture in a separate standalone helper method that is accessed by multiple test methods.
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Further types of construction include eccentric roller fixtures, thread grips and button head grips and rope grips.
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during the test. The influence of test fixtures on test results is important and is an ongoing subject of research.
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Software which is used to run reproducible tests systematically on a piece of software under test is known as a
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2016 IEEE 14th
International Conference on Software Engineering Research, Management and Applications (SERA)
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in place and allow it to be tested by being subjected to controlled electronic test signals. Examples are a
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ASTM D6641 Compressive
Properties of Polymer Matrix Using a Combined Loading Compression Test Fixture
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is all the things that must be in place in order to run a test and expect a particular outcome.
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A disadvantage is that it could lead to duplication of test fixtures if using in-line setup.
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The
Influence of Test Fixture Design on the Shear Test for Fiber Composite Materials
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Test fixtures can be set up three different ways: in-line, delegate, and implicit.
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Greiler, Michaela; Zaidman, Andy; van
Deursen, Arie; Storey, Margaret-Anne (2013).
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582:"Automated test Fixture For In-Production Functional Testing of Electronic Devices"
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very compact wedge grip for temperature chambers providing extreme temperatures
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more steps than needed for the test; this is a problem seen in in-line setup.
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detail the requirements of test fixtures in the text of the document.
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Strategies for
Avoiding Text Fixture Smells during Software Evolution
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Side connectors, centering pins, test needles, pre-centering parts.
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Verify, determining whether the expected outcome has been obtained
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A functional test fixture is a complex device to interface the
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ASTM-D5034 Textile vice grip of a specialized manufacturer
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Some fixtures employ clamps, wedge grips and pincer grips.
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B829 Test for
Determining the Formability of copper Strip
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This article is about test fixtures. For other uses, see
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pneumatic grip, symmetrical, clamping force 2.4 kN
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one would create the expected state for the test and in
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heavy duty hydraulic clamps, clamping force 700 kN
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different vice and screw grips of a German manufacturer
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symmetric roller grip, self-closing and self-adjusting
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multiple button head grip for speedy tests on series
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procedures and linking to an external test fixture.
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614:"Execution and code reuse between test classes"
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419:offset compensated wedge grip max.50 kN
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290:Frequently fixtures are created by handling
538:Bending device for tensile testing machines
390:jet engine fixtures for operational testing
736:xUnit Test Patterns: Refactoring Test Code
326:Tear down, to return to the original state
612:Pereira da Silva, Lucas (June 10, 2016).
580:Tadic, Srdjan; Vukajlovic, Milan (2018).
128:Learn how and when to remove this message
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310:it would clean up what had been set up.
680:"A Guide to Testing Rails Applications"
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21:Fixture (disambiguation)
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658:"Test Fixture - xUnit"
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759:on 23 September 2016.
62:improve this article
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202:web framework uses
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243:Practices to avoid
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774:. ASTM STP.
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718:24 January
568:References
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556:See also
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