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<title>Boost Test Policies and Protocols</title>
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<td bgcolor="#FFFFFF"><img src="../boost.png" alt="boost.png (6897 bytes)" width="277" height="86"></td>
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<td><a href="../index.htm"><font face="Arial" color="#FFFFFF"><big>Home</big></font></a></td>
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<td><a href="../libs/libraries.htm"><font face="Arial" color="#FFFFFF"><big>Libraries</big></font></a></td>
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<td><a href="index.htm"><font face="Arial" color="#FFFFFF"><big>More</big></font></a></td>
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<h1>Boost Test Policies and Protocols</h1>
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<p>The Boost libraries are intended to be both reliable and portable.
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Every experienced programmer knows that means each library must be tested against a suitable number of test cases, on a wide range of platforms,
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and then tested again (regression tested) every time a change is made and before
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every release. </p>
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<p>"Quality assurance based on a wide range of targeted tests" as one
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of the key answers to C.A.R
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Hoare's question
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"How did software get so reliable without proof."</p>
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<h2>Regression test</h2>
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<p>Boost uses an automatic <a href="regression.html"> regression test suite</a> which generates HTML
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<a href="../status/compiler_status.html">compiler
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status tables</a>.</p>
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<h2>Test Policy</h2>
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<h3>Required</h3>
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<ul>
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<li>Every Boost library should supply one or more suitable test programs to be
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exercised by the Boost <a href="regression.html"> regression test suite</a>. In addition to
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the usual compile-link-run tests expecting successful completion,
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compile-only or compile-and-link-only tests may be performed, and success
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for the test may be defined as failure of the steps.</li>
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<li>Test program execution must report errors by returning a non-zero value. They
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may also write to stdout or stderr, but that output should be relatively
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brief. Regardless of other output, a non-zero return value is the only
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way the regression test framework will recognize an error has
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occurred. Note that test programs to be included in the status tables must
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compile, link, and run quickly since the tests are executed many, many,
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times.</li>
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<li>Libraries with time consuming tests should be divided into a
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fast-execution basic test program for the status tables, and a separate
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full-coverage test program for exhaustive test cases. The basic test
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should concentrate on compilation issues so that the status tables
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accurately reflect the library's likelihood of correct compilation on a
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platform.</li>
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<li>If for any reason the usual test policies do not apply to a particular
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library, an alternate test strategy must be implemented.</li>
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<li>A <a href="regression.html#Adding_new_test">Jamfile</a> to drive the
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regression tests for the library. </li>
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</ul>
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<h3>Optional (but highly recommended)</h3>
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<p>The <a href="../libs/test/index.html">Boost Test Library</a> provides many
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useful components which ease the construction of test programs.</p>
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<ul>
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<li>Use the library's
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<a href="../libs/test/doc/components/test_tools/index.html">Test Tools</a> for the construction of simple test
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programs that do not need much structure.</li>
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<li>Use the library's
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<a href="../libs/test/doc/components/utf/index.html">Unit Test
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Framework</a> for the construction of more complex test programs that need to
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be structured into individual tests
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and test suites.</li>
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</ul>
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<h2>Suggested Protocol for Fixing Bugs or Adding Features.</h2>
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<ul>
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<li>First, add regression test cases that detects the bug or tests the
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feature. Sometimes adding one case suggests similar untested cases, and they
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are added too.</li>
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<li>Second, for bugs, run the regression test and verify that the bug is now
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detected.</li>
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<li>Third, then, and only then, fix the bug or add the feature.</li>
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<li>Finally, rerun the full regression tests - sometimes the change breaks
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something else.</li>
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</ul>
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<h2>History</h2>
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<p><a href="regression.html#History">See Regression Test History</a>.</p>
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<h2>Acknowledgements</h2>
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<p>Written by Beman Dawes. Jens Maurer, Paul Moore, Gary Powell and Jeremy Siek contributed helpful suggestions.</p>
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<hr>
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<p>Revised <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->08 January, 2004<!--webbot bot="Timestamp" endspan i-checksum="38708" -->
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</p>
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<p><EFBFBD> Copyright Beman Dawes 2001</p>
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<p>Distributed under the Boost Software License, Version 1.0. (See
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accompanying file <a href="../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or copy
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at <a href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</p>
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