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<h2><a name="junit">JUnit</a></h2>
<h3>Description</h3>

<p>This task runs tests from the JUnit testing framework. The latest
version of the framework can be found at 
<a href="http://www.junit.org">http://www.junit.org</a>.
This task has been tested with JUnit 3.0 up to JUnit 3.6, it won't
work with versions before JUnit 3.0.</p>

<p>Tests are defined by nested <code>test</code> or
<code>batchtest</code> tags, see <a href="#nested">nested
elements</a>.</p>

<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
<tr>
  <td width="12%" valign="top"><b>Attribute</b></td>
  <td width="78%" valign="top"><b>Description</b></td>
  <td width="10%" valign="top"><b>Required</b></td>
</tr>
  <tr>
    <td valign="top">printsummary</td> 
    <td valign="top">Print one line statistics for each testcase.</td>
    <td align="center" valign="top">No, default is "off"</td>
  </tr>
  <tr>
    <td valign="top">fork</td> 
    <td valign="top">Run the tests in a separate VM.</td>
    <td align="center" valign="top">No, default is "off"</td>
  </tr>
  <tr>
    <td valign="top">haltonerror</td> 
    <td valign="top">Stop the build process if an error occurs during the test
       run.</td>
    <td align="center" valign="top">No, default is "off"</td>
  </tr>
  <tr>
    <td valign="top">haltonfailure</td> 
    <td valign="top">Stop the build process if a test fails (errors are 
      considered failures as well).</td>
    <td align="center" valign="top">No, default is "off"</td>
  </tr>
  <tr>
    <td valign="top">timeout</td> 
    <td valign="top">Cancel the individual tests if the don't finish
      in the given time (measured in milliseconds).  Ignored if fork is
      disabled.</td> 
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">maxmemory</td>
    <td valign="top">Max amount of memory to allocate to the forked VM
      (ignored if fork is disabled)</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">jvm</td>
    <td valign="top">the command used to invoke the Java Virtual Machine,
      default is 'java'.  The command is resolved by java.lang.Runtime.exec().
      Ignored if fork is disabled.</td>
    <td align="center" valign="top">No, default &quot;java&quot;</td>
  </tr>
  <tr>
    <td valign="top">dir</td>
    <td valign="top">The directory to invoke the VM in. (ignored if
      fork is disabled)</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>

<h3><a name="nested">Nested Elements</a></h3>

<p><code>junit</code> supports a nested <code>&lt;classpath&gt;</code>
element, that represents a <a href="../using.html#path">PATH like
structure</a>.</p>

<h4>jvmarg</h4>

<p>If fork is enabled, additional parameters may be passed to the new
VM via nested <code>&lt;jvmarg&gt;</code> attributes, for example:

<pre>
&lt;junit fork=&quot;yes&quot;&gt;
  &lt;jvmarg value=&quot;-Djava.compiler=NONE&quot;/&gt;
  ...
&lt;/junit&gt;
</pre>

would run the test in a VM without JIT.</p>

<p><code>&lt;jvmarg&gt;</code> allows all attributes described in <a
href="../using.html#arg">Command line arguments</a>.</p>

<h4>sysproperty</h4>

<p>Use nested <code>&lt;sysproperty&gt;</code> elements to specify system
properties required by the class. These properties will be made available
to the VM during the execution of the test (either ANT's VM or the forked VM).
The attributes for this element are the same as for <a href="../CoreTasks/exec.html#env">environment variables</a>.

<pre>
&lt;junit fork=&quot;no&quot;&gt;
  &lt;sysproperty key=&quot;basedir&quot; value=&quot;${basedir}&quot;/&gt;
  ...
&lt;/junit&gt;
</pre>

would run the test in ANT's VM and make the <code>basedir</code> property
available to the test.</p>


<h4>formatter</h4>

<p>The results of the tests can be printed in different
formats. Output will always be sent to a file unless you set the
usefile attribute to false, the name of the file is determined by the
name of the test and can be set by the <code>outfile</code> attribute
of <code>&lt;test&gt;</code>.

<p>There are two predefined formatters, one prints the test results in
XML format, the other emits plain text. Custom formatters that need to
implement
<code>org.apache.tools.ant.taskdefs.optional.junit.JUnitResultFormatter</code>
can be specified.</p>

<table border="1" cellpadding="2" cellspacing="0">
<tr>
  <td width="12%" valign="top"><b>Attribute</b></td>
  <td width="78%" valign="top"><b>Description</b></td>
  <td width="10%" valign="top"><b>Required</b></td>
</tr>
  <tr>
    <td valign="top">type</td> 
    <td valign="top">Use a predefined formatter (either "xml" or "plain").</td>
    <td align="center" rowspan="2">Exactly one of these.</td>
  </tr>
  <tr>
    <td valign="top">classname</td> 
    <td valign="top">Name of a custom formatter class.</td>
  </tr>
  <tr>
    <td valign="top">extension</td> 
    <td valign="top">Extension to append to the output filename.</td>
    <td align="center">Yes, if classname has been used.</td>
  </tr>
  <tr>
    <td valign="top">usefile</td> 
    <td valign="top">Boolean that determines whether output should be
      sent to a file.</td>
    <td align="center">No, default true.</td>
  </tr>
</table>

<h4>test</h4>

<p>Defines a single test class.</p>

<table border="1" cellpadding="2" cellspacing="0">
<tr>
  <td width="12%" valign="top"><b>Attribute</b></td>
  <td width="78%" valign="top"><b>Description</b></td>
  <td width="10%" valign="top"><b>Required</b></td>
</tr>
  <tr>
    <td valign="top">name</td> 
    <td valign="top">Name of the test class</td>
    <td align="center">Yes</td>
  </tr>
  <tr>
    <td valign="top">fork</td> 
    <td valign="top">Run the tests in a separate VM. 
      Overrides value set in <code>&lt;junit&gt;</code>.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">haltonerror</td> 
    <td valign="top">Stop the build process if an error occurs during the test
       run. Overrides value set in <code>&lt;junit&gt;</code>.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">haltonfailure</td> 
    <td valign="top">Stop the build process if a test fails (errors are 
      considered failures as well).  Overrides value set in 
      <code>&lt;junit&gt;</code>.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">todir</td> 
    <td valign="top">Directory to write the reports to.</td>
    <td align="center" valign="top">No, default is current directory.</td>
  </tr>
  <tr>
    <td valign="top">outfile</td> 
    <td valign="top">Base name of the test result. The full filename is
      determined by this attribute and the extension of
      <code>formatter</code>.</td>
    <td align="center" valign="top">No, default is
      <code>TEST-name</code> using the <code>name</code> attribute.</td>
  </tr>
  <tr>
    <td valign="top">if</td> 
    <td valign="top">Only run test if the named property is set.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">unless</td> 
    <td valign="top">Only run test if the named property is <b>not</b> set.</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>

<p>Tests can define their own formatters via nested
<code>&lt;formatter&gt;</code> elements.</p>

<h4>batchtest</h4>

<p>Define a number of tests based on pattern matching.</p>

<p><code>batchtest</code> collects the included files from any number
of nested <a
href="../CoreTypes/fileset.html"><code>&lt;fileset&gt;</code></a>s. It then
generates a test class name for each file that ends in
<code>.java</code> or <code>.class</code>.</p>

<table border="1" cellpadding="2" cellspacing="0">
<tr>
  <td width="12%" valign="top"><b>Attribute</b></td>
  <td width="78%" valign="top"><b>Description</b></td>
  <td width="10%" valign="top"><b>Required</b></td>
</tr>
  <tr>
    <td valign="top">fork</td> 
    <td valign="top">Run the tests in a separate VM. 
      Overrides value set in <code>&lt;junit&gt;</code>.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">haltonerror</td> 
    <td valign="top">Stop the build process if an error occurs during the test
       run. Overrides value set in <code>&lt;junit&gt;</code>.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">haltonfailure</td> 
    <td valign="top">Stop the build process if a test fails (errors are 
      considered failures as well).  Overrides value set in 
      <code>&lt;junit&gt;</code>.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">todir</td> 
    <td valign="top">Directory to write the reports to.</td>
    <td align="center" valign="top">No, default is current directory.</td>
  </tr>
  <tr>
    <td valign="top">if</td> 
    <td valign="top">Only run tests if the named property is set.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">unless</td> 
    <td valign="top">Only run tests if the named property is <b>not</b> set.</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>

<p>Batchtests can define their own formatters via nested
<code>&lt;formatter&gt;</code> elements.</p>

<h3>Examples</h3>

<p><pre>
&lt;junit&gt;
  &lt;test name="my.test.TestCase" /&gt;
&lt;/junit&gt;
</pre>

Runs the test defined in <code>my.test.TestCase</code> in the same
VM. No output will be generated unless the test fails.</p>

<p><pre>
&lt;junit printsummary="yes" fork="yes" haltonfailure="yes"&gt;
  &lt;formatter type="plain" /&gt;
  &lt;test name="my.test.TestCase" /&gt;
&lt;/junit&gt;
</pre>

Runs the test defined in <code>my.test.TestCase</code> in a
separate VM.  At the end of the test a single line summary will be
printed. A detailed report of the test can be found in
<code>TEST-my.test.TestCase.txt</code>. The build process will be
stopped if the test fails.</p>

<p><pre>
&lt;junit printsummary="yes" haltonfailure="yes"&gt;
  &lt;classpath&gt;
    &lt;pathelement location="${build.tests}" /&gt;
    &lt;pathelement path="${java.class.path}" /&gt;
  &lt;/classpath&gt;

  &lt;formatter type="plain" /&gt;

  &lt;test name="my.test.TestCase" haltonfailure="no" outfile="result" &gt;
    &lt;formatter type="xml" /&gt;
  &lt;/test&gt;

  &lt;batchtest fork="yes" todir="${reports.tests}"&gt;
    &lt;fileset dir="${src.tests}"&gt;
      &lt;include name="**/*Test*.java" /&gt;
      &lt;exclude name="**/AllTests.java" /&gt;
    &lt;/fileset&gt;
  &lt;/batchtest&gt;
&lt;/junit&gt;
</pre>

Runs <code>my.test.TestCase</code> in the same VM (ignoring the
given CLASSPATH), only a warning is printed if this test fails. In
addition to the plain text test results, for this test a XML result
will be output to <code>result.xml</code>.</p>

<p>For each matching file in the directory <code>${src.tests}</code> a
test is run in a separate VM. If a test fails, the build process is
aborted. Results are collected in files named
<code>TEST-<em>name</em>.txt</code> and written to <code>${reports.tests}</code>.</p>

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