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POUnit test fails only when running from with Ant task
 

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    <p>I run the same tests from both eclipse and from an Ant task. When running from eclipse all tests pass. When I run Ant junit task, one, single test fails with the following strange error:</p> <blockquote> <p>junit.framework.AssertionFailedError at org.eclipse.ant.internal.launching.remote.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32) at org.eclipse.ant.internal.launching.remote.InternalAntRunner.run(InternalAntRunner.java:423) at org.eclipse.ant.internal.launching.remote.InternalAntRunner.main(InternalAntRunner.java:137) at unitests.mypackage.MyTestClass.myTestCase(Unknown Source)</p> </blockquote> <p>What can be the cause? </p> <p>I read a little and found out that it might be because eclipse and Ant use different versions of junit. In my project, junit is located at libs/junit-4.10.jar and referenced both in eclipse's .classpath file and in junit task classpath. You can see Ant's task here:</p> <pre><code>&lt;path id="classpath"&gt; &lt;fileset dir="${lib.dir}" includes="**/*.jar"/&gt; &lt;fileset dir="${src.dir}" includes="**/*.jar"/&gt; &lt;/path&gt; ... &lt;target name="run-unit-tests" depends="compile,compile-unit-tests"&gt; &lt;mkdir dir="${junit.output.dir}"/&gt; &lt;junit fork="yes" printsummary="yes" haltonfailure="no"&gt; &lt;classpath&gt; &lt;path refid="classpath"/&gt; &lt;fileset dir="${unit.tests.classes.dir}" includes="**/*.class"/&gt; &lt;/classpath&gt; &lt;formatter type="xml"/&gt; &lt;batchtest todir="${junit.output.dir}"&gt; &lt;fileset dir="${unit.tests.dir}"&gt; &lt;include name="**/*Test*.java"/&gt; &lt;/fileset&gt; &lt;/batchtest&gt; &lt;/junit&gt; &lt;mkdir dir="${junit.report.dir}"/&gt; &lt;junitreport todir="${junit.report.dir}"&gt; &lt;fileset dir="${junit.output.dir}"&gt; &lt;include name="TEST-*.xml"/&gt; &lt;/fileset&gt; &lt;report format="frames" todir="${junit.report.dir}/html"/&gt; &lt;/junitreport&gt; &lt;/target&gt; </code></pre> <p>The version of Ant is 1.7.1 and it came with eclipse.</p> <p><strong>Edit:</strong></p> <p>Eventually solved it by adding <code>fork="yes</code>" to junit's task. Found it by generating build file using eclipse's export option, and then looking at the differences between the generated file and mine. No idea why forking solves the problem though.</p>
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