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- <a name="boost_test.intro.design_rationale"></a><a class="link" href="design_rationale.html" title="Design rationale">Design rationale</a>
- </h3></div></div></div>
- <p>
- Unit testing tasks arise during many different stages of software development:
- from initial project implementation to its maintenance and later revisions.
- These tasks differ in their complexity and purpose and accordingly are approached
- differently by different developers. The wide spectrum of tasks in a problem
- domain cause many requirements (sometimes conflicting) to be placed on a
- unit testing framework. These include:
- </p>
- <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
- <li class="listitem">
- Writing a <a class="link" href="../section_glossary.html#ref_test_module">unit test module</a> should
- be simple and obvious for new users.
- </li>
- <li class="listitem">
- The framework should allow advanced users to perform non-trivial tests.
- </li>
- <li class="listitem">
- Test module should be able to have many small test cases and developer
- should be able to group them into test suites.
- </li>
- <li class="listitem">
- At the beginning of the development users want to see verbose and descriptive
- error messages.
- </li>
- <li class="listitem">
- During the regression testing users just want to know if any tests failed.
- </li>
- <li class="listitem">
- For small test modules, their execution time should prevail over compilation
- time: user don't want to wait a minute to compile a test that takes a
- second to run.
- </li>
- <li class="listitem">
- For long and complex tests users want to be able to see the testing progress.
- </li>
- <li class="listitem">
- Simplest tests shouldn't require an external library.
- </li>
- <li class="listitem">
- For long term usage users of the <span class="emphasis"><em>Unit Test Framework</em></span>
- should be able to build it as a standalone library.
- </li>
- </ul></div>
- <p>
- The <span class="emphasis"><em>Unit Test Framework</em></span> satisfies the requirements above,
- and provides versatile facilities to:
- </p>
- <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
- <li class="listitem">
- Easily specify all the expectations in the code being tested.
- </li>
- <li class="listitem">
- Organize these expectations into <a class="link" href="../section_glossary.html#test_case">test cases</a>
- and <a class="link" href="../section_glossary.html#test_suite">test suites</a>.
- </li>
- <li class="listitem">
- Detect different kinds of errors, failures, time-outs and report them
- in a uniform customizable way.
- </li>
- </ul></div>
- <h5>
- <a name="boost_test.intro.design_rationale.h0"></a>
- <span class="phrase"><a name="boost_test.intro.design_rationale.why_framework"></a></span><a class="link" href="design_rationale.html#boost_test.intro.design_rationale.why_framework">Why
- do you need a framework?</a>
- </h5>
- <p>
- While you can write a testing program yourself from scratch, the framework
- offers the following benefits:
- </p>
- <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
- <li class="listitem">
- You get an error report in a text format. Error reports are uniform and
- you can easily machine-analyze them.
- </li>
- <li class="listitem">
- Error reporting is separated from the testing code. You can easily change
- the error report format without affecting the testing code.
- </li>
- <li class="listitem">
- The framework automatically detects exceptions thrown by the tested components
- and time-outs, and reports them along other errors.
- </li>
- <li class="listitem">
- You can easily filter the test cases, and call only the desired ones.
- This does not require changing the testing code.
- </li>
- </ul></div>
- </div>
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