testng fails to load test classes from ant

Question

I'm trying to run TestNG tests from Ant. After reading the manual, I came up with:

<taskdef name="testng" classname="org.testng.TestNGAntTask" classpath="../../lib/testng-6.8.1.jar"/>
<target name="testng" depends="compile-tests" description="Run testng test suite">      

<fileset id="mixed.tests" dir="${bin.main}">
    <include name="**/*Test.*"/>
</fileset>

<testng mode="mixed" classfilesetref="mixed.tests" 
    verbose="5"
    failureProperty="tests.failed" outputdir="/tmp/report">
    <classpath>
        <fileset dir="../../lib" includes="*.jar"/>
        <fileset dir="../../java/bin/" includes="**/*.class"/>
    <fileset dir="/home/y/lib/jars" excludes="junit*jar,messagebus-disc-parent.jar" includes="**/*.jar" description="all jars installed by dependent pacakges" />
    </classpath>
</testng>

When I run it it fails with:

   [testng] 'org.testng.TestNG'
   [testng] '@/tmp/testng8260935716887369607'
   [testng]
   [testng] The ' characters around the executable and arguments are
   [testng] not part of the command.
   [testng] Exception in thread "main" org.testng.TestNGException:
   [testng] Cannot load class from file: /home/adamatan/SOME_PATH_THAT_EXISTS/functional/EnforceBasicFilteringTest.class
   [testng]     at org.testng.internal.ClassHelper.fileToClass(ClassHelper.java:600)
   [testng]     at org.testng.TestNG.configure(TestNG.java:1393)
   [testng]     at org.testng.TestNG.privateMain(TestNG.java:1354)
   [testng]     at org.testng.TestNG.main(TestNG.java:1333)
   [testng] The tests failed.

What I've already tried:

Files and permissions:

/home/adamatan/SOME_PATH_THAT_EXISTS/functional/EnforceBasicFilteringTest.class:

• Appears in the classpath printout (it's very long, so I don't put it here).
• Is created by the compile target, so it is non-empty, and ant can read its contents.
• ls -l-ing the file gives -rw-r--r-- 1 adamatan users 4548 Nov 21 12:19

mode type:

Tried both testng mode="testng" and testng mode="mixed". Both failed with the same error.

Why can't testng read this valid class file that was just created?

Answer 1

The same problem was solved for me by adding to the classpath the directory where tests themselves are located (looks like it's ${bin.main} in your case).