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<span class="el_source">Development Conventions</span>
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<h1>Development Conventions</h1>
<p>
Efficient team work that produces high-quality software requires a common set
of rules.
</p>
<h2>Consistent Source Tree</h2>
<p>
Update your sources and run the build locally before every check-in. Commit
only if the build succeeds.
</p>
<p>
Documentation is part of the product. Whenever you implement a new feature or
change existing behavior make sure to update all corresponding JavaDoc as well
as other documentation with the same change set. The product should always be
in a consistent state. For every change the following items should be checked:
</p>
<ul>
<li>Corresponding JavaDoc.</li>
<li>Documentation referring to the modified concepts, interfaces or
implementation.</li>
<li>New features, bug fixes and modified behavior should be enlisted in the
<code>org.jacoco.doc/docroot/doc/changes.html</code> file together with
the corresponding issue tracker id.</li>
</ul>
<h2>Design for Integration</h2>
<p>
The primary focus of the JaCoCo project is to provide a code coverage library.
Integrators may want to embed JaCoCo in different tools and environments with
very different usage scenarios. Therefore following aspects should be considered:
</p>
<p>
<b>Documentation:</b> All APIs should be properly documented on different
levels of granularity:
</p>
<ul>
<li>General usage</li>
<li>Bundle summary</li>
<li>Package summary</li>
<li>Type description</li>
<li>Member description</li>
</ul>
<p>
<b>Proper Units:</b> All APIs and internal implementation classes should form proper
units with well defined responsibilities and dependencies. Each class and method
should focus on a single concept. It should be possible to use different aspects
separately.
</p>
<p>
<b>Abstraction:</b> All APIs must use the most general abstractions possible. For instance
reading binary data should rely on the <code>java.io.InputStream</code> interface, not
on a <code>java.io.File</code> object.
</p>
<p>
<b>System Dependencies:</b> Avoid any dependencies to the local file system, network
resources, threads, processes etc.
</p>
<h2>Test Driven Development</h2>
<p>
All code added to JaCoCo should have corresponding JUnit test cases. Ideally tests
are developed before or along with the actual implementation:
</p>
<ul>
<li>Every new feature should be verified by test cases.</li>
<li>Modified behavior should also be reflected by test cases.</li>
<li>Ideally for every reported bug a reproducer is added to the unit tests.</li>
</ul>
<h2>Keep an Eye on License Issues</h2>
<p>
All code included with JaCoCo must conform to the EPL license.
</p>
<ul>
<li>
Every committer and contributor must agree that all code will be published
under EPL. He or she must be the original author and must have the
permission to contribute code to JaCoCo, for example if such a permission
is required by the employer.
</li>
<li>
Every third party content must be enlisted in the corresponding
<code>about.html</code> file along with its license.
</li>
<li>
Every third party content included with the JaCoCo distribution must be
enlisted in the <code>org.jacoco.doc/docroot/doc/license.html</code> file
and the corresponding <code>about.html</code> file along with its license.
</li>
<li>
Every source file (Java, Build Script, DTD) must have a
<a href="http://www.eclipse.org/legal/copyrightandlicensenotice.php">EPL
license notice</a>. The initial contributor should be listed. In case of
significant changes or additions additional contributors should also
be listed.
</li>
</ul>
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