Closure unit testing build target

build.xml

<target name="test-js">
    <echo message="Running javascript unit tests" />
    <concat destfile="tests-concat.js">
        <fileset dir="tests" includes="*Test.js" />
    </concat>
    <exec executable="${library}/bin/calcdeps.py">
        <arg value="--compiler_flag=--compilation_level=WHITESPACE_ONLY" />
        <arg value="--compiler_jar=${compiler}" />
        <arg value="--input=scripts/foo.js" />
        <arg value="--input=tests-concat.js" />
        <arg value="--input=tests/testRunner.js" />
        <arg value="--path=${library}" />
        <arg value="--output_file=tests.js" />
        <arg value="--output_mode=compiled" />
    </exec>
    <concat destfile="tests.js" append="yes">
        phantom.exit();
    </concat>
    <delete file="tests-concat.js" />
    <exec executable="${phantomjs}" outputproperty="test-results">
        <arg value="tests.js" />
    </exec>
    <delete file="tests.js" />
    <echo message="Running javascript unit tests" />
    <echo message="${test-results}" />
</target>