galaxy/test/functional/tool-data/sample_tool_data_tables.xml

<tables>
  <table name="testalpha" comment_char="#">
    <columns>value, name, path</columns>
    <file path="${__HERE__}/testalpha.loc" />
  </table>
  <table name="testbeta" comment_char="#">
    <columns>value, path</columns>
    <file path="${__HERE__}/testbeta.loc" />
  </table>
</tables>