build.xml

<project name="hNes" default="build" basedir=".">
    <presetdef name="javac">
        <javac includeantruntime="false" />
    </presetdef>

    <property name="src" location="src" />
    <property name="build" location="build" />
    <property name="test" location="test" />
    <property name="src.classes" location="${build}/classes" />
    <property name="test.classes" location="${build}/tests" />
    
    
    <target name="build">
        <mkdir dir="${src.classes}" />
        <javac srcdir="${src}" destdir="${src.classes}" />
    </target>
    
    <target name="test" depends="build">
        <mkdir dir="${test.classes}" />
        <javac srcdir="${test}" destdir="${test.classes}" >
            <classpath>
                <pathelement path="${src.classes}" />
                <pathelement location="${test}/*" />
            </classpath>
        </javac>
    </target>
    
    <target name="clean">
        <delete dir="${build}" />
    </target>
</project>

buildOutput

Buildfile: /home/hayden/dev/nes/build.xml
Trying to override old definition of task javac

build:
    [javac] Compiling 1 source file to /home/hayden/dev/nes/build/classes

test:
    [javac] Compiling 1 source file to /home/hayden/dev/nes/build/tests
    [javac] /home/hayden/dev/nes/test/com.haydenmuhl.hnes/MainTest.java:3: package org.junit does not exist
    [javac] import org.junit.*;
    [javac] ^
    [javac] /home/hayden/dev/nes/test/com.haydenmuhl.hnes/MainTest.java:6: cannot find symbol
    [javac] symbol  : class Test
    [javac] location: class com.haydenmuhl.hnes.MainTest
    [javac]     @Test
    [javac]      ^
    [javac] /home/hayden/dev/nes/test/com.haydenmuhl.hnes/MainTest.java:10: cannot find symbol
    [javac] symbol  : method assertTrue(boolean)
    [javac] location: class com.haydenmuhl.hnes.MainTest
    [javac]         assertTrue(main.returnsTrue());
    [javac]         ^
    [javac] 3 errors

BUILD FAILED
/home/hayden/dev/nes/build.xml:20: Compile failed; see the compiler error output for details.

Total time: 1 second

sourceTree

.
|-- build
|   |-- classes
|   |   `-- com
|   |       `-- haydenmuhl
|   |           `-- hnes
|   |               `-- Main.class
|   `-- tests
|-- build.xml
|-- README
|-- src
|   `-- com.haydenmuhl.hnes
|       `-- Main.java
`-- test
    |-- com.haydenmuhl.hnes
    |   `-- MainTest.java
    `-- junit-4.10.jar