Ant & JUnit java.lang.NullPointerException

[lionelv]

I'm migrating from Netbeans to setup all of my compiling, packaging
and testing. However, I'm having troubles getting the testing part
working. Here's the snippet of code I'm currently using:

<property name="src" value="src"/>
<property name="lib" value="lib"/>
<property name="build" value="build"/>
<property name="dist" value="dist"/>
<property name="dist-lib" value="${dist}/lib"/>
<property name="src.lib.runtime" value="${lib}/runtime"/>
<property name="classes" value="${build}/classes/"/>
<property name="jar.executable" value="${dist}/$
{ant.project.name}.jar"/>
<property name="test.src" value="test"/>
<property name="test.execute" value="${build}/test"/>
<property name="test.reports" value="${test.execute}/reports"/>

<!-- Runs the JUnit Tests -->
<target name="test">
<mkdir dir="${test.reports}"/>
<copy todir="${test.execute}">
<fileset dir="${src}"/>
</copy>
<copy todir="${test.execute}">
<fileset dir="${test.src}"/>
</copy>
<javac srcdir="${test.execute}"
classpath="${classpath}"
debug="true"
source="1.5"
/>
<junit dir="${test.execute}">
<test name="tciworks.analysis.BayesianTest"/>
</junit>
<!--junit printsummary="yes">
<formatter type="plain"/>
<batchtest fork="yes" todir="${test.reports}">
<fileset dir="${test.execute}}">
<include name="**/*Test*.java"/>
</fileset>
</batchtest>
</junit-->
</target>

Code being tested is in ${src}
Test cases are in ${test.src}.
All of the source is copied to ${test.execute} and compiled there.

When I try to test I get the following (trimmed) error:

Apache Ant version 1.7.0 compiled on December 13 2006
Buildfile: build.xml
Detected Java version: 1.5 in: c:\Program Files\Java\jdk1.5.0_06\jre
Detected OS: Windows XP
[antlibrg.apache.tools.ant] Could not load definitions from resource
org/apache/tools/ant/antlib.xml. It could not be found.
[snip]
test:
[mkdir] Skipping c:\TCIWorks\TCIWorksApplication\build\test
\reports because it already exists.
[copy] tciworks\TCIWorks.java omitted as c:\TCIWorks
\TCIWorksApplication\build\test\tciworks\TCIWorks.java is up to date.
[copy] tciworks\UpdateManager.java omitted as c:\TCIWorks
\TCIWorksApplication\build\test\tciworks\UpdateManager.java is up to
date.
[copy] tciworks\analysis\AbstractObjective.java omitted as c:
\TCIWorks\TCIWorksApplication\build\test\tciworks\analysis
\AbstractObjective.java is up to date.
[snip]
[javac] tciworks\util\TCIFigures.java omitted as c:\TCIWorks
\TCIWorksApplication\build\test\tciworks\util\TCIFigures.class is up
to date.
[javac] tciworks\util\TCISwingWorker.class skipped - don't know
how to handle it
[javac] tciworks\util\TCISwingWorker.java omitted as c:\TCIWorks
\TCIWorksApplication\build\test\tciworks\util\TCISwingWorker.class is
up to date.
[javac] tciworks\util\TCIWorksConstants.class skipped - don't know
how to handle it
[javac] tciworks\util\TCIWorksConstants.java omitted as c:\TCIWorks
\TCIWorksApplication\build\test\tciworks\util\TCIWorksConstants.class
is up to date.

BUILD FAILED
c:\TCIWorks\TCIWorksApplication\build.xml:134:
java.lang.NullPointerException
at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:
115)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:
1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:
41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:698)
at org.apache.tools.ant.Main.startAnt(Main.java:199)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.lang.NullPointerException
at org.apache.tools.ant.types.Path.add(Path.java:261)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:
753)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:
288)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:
105)
... 11 more
--- Nested Exception ---
java.lang.NullPointerException
at org.apache.tools.ant.types.Path.add(Path.java:261)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:
753)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:
288)

 

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

I'm migrating from Netbeans to setup all of my compiling, packaging
and testing. However, I'm having troubles getting the testing part
working. Here's the snippet of code I'm currently using:

<junit dir="${test.execute}">
<test name="tciworks.analysis.BayesianTest"/>
</junit>
<!--junit printsummary="yes">
<formatter type="plain"/>
<batchtest fork="yes" todir="${test.reports}">
<fileset dir="${test.execute}}">
<include name="**/*Test*.java"/>
</fileset>
</batchtest>
</junit-->
</target>

Code being tested is in ${src}
Test cases are in ${test.src}.
All of the source is copied to ${test.execute} and compiled there.

When I try to test I get the following (trimmed) error:

Apache Ant version 1.7.0 compiled on December 13 2006
Buildfile: build.xml
Detected Java version: 1.5 in: c:\Program Files\Java\jdk1.5.0_06\jre
Detected OS: Windows XP

Caused by: java.lang.NullPointerException
at org.apache.tools.ant.types.Path.add(Path.java:261)

Very hard to say without having the code to play with.

You could try replace:

<junit dir="${test.execute}">

with:

<junit fork="on" dir="${test.execute}">

because I have often had problems without that.

Arne