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Test double
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<p>A test double is <a href="/facts/Software/RP79lVSW">software</a> used in <a href="/facts/Software_testing/VoXzG9Tb">software</a> <a href="/facts/Test_automation/UAVXbSTV">test automation</a> that satisfies a <a href="/facts/Dependency_(computer_science)/QEeSaXF3">dependency</a> so that the test need not depend on production code. A test double provides functionality via an <a href="/facts/Interface_(computing)/zdfp8unT">interface</a> that the software under test cannot distinguish from production code. </p><p>A <a href="/facts/Programmer/WGTS1Jv9">programmer</a> generally uses a test double to isolate the behavior of the consuming code from the rest of the <a href="/facts/Codebase/MT0CJ4oD">codebase</a>. </p><p>A test double is usually a simplified version of the production code and may include capabilities specific to testing. </p><p>Test doubles are used to build <a href="/facts/Test_harness/AyrtsIcR">test harnesses</a>. </p>