add functional tool test for directory datatypes

<tool id="directory_datatype" name="Directory datatype" version="@TOOL_VERSION@+galaxy@VERSION_SUFFIX@" profile="25.0" license="MIT">

    <description>Test with the directory</description>

    <macros>

        <token name="@TOOL_VERSION@">0.1.0</token>

        <token name="@VERSION_SUFFIX@">0</token>

    </macros>

    <command detect_errors="exit_code"><![CDATA[

        ls '$directory_in.files_path'/* &&

        mkdir '$directory_out.files_path' &&

        cp -r '$directory_in.files_path'/* '$directory_out.files_path'/ &&

        ls '$directory_out.files_path'/* &&

        ls '$directory_derived_in.files_path'/* &&

        mkdir '$directory_derived_out.files_path' &&

        cp -r '$directory_derived_in.files_path'/* '$directory_derived_out.files_path'/ &&

        ls '$directory_derived_out.files_path'/*

    ]]></command>

    <inputs>

        <param name="directory_in" type="data" format="directory" label="Directory input" />

        <param name="directory_derived_in" type="data" format="lexicmap_index" label="Lexicmap Index input" />

    </inputs>

    <outputs>

        <data name="directory_out" format="directory" label="${tool.name} on ${on_string}: Directory" />

        <data name="directory_derived_out" format="lexicmap_index" label="${tool.name} on ${on_string}: Lexic Map Index" />

    </outputs>

    <tests>

        <test>

            <param name="directory_in" value="testdir1.tar"/>

            <param name="directory_derived_in" value="testdir1.tar"/>

            <output name="directory_out" value="testdir1.tar.directory"/>

            <output name="directory_derived_out" value="testdir1.tar.directory"/>

        </test>

        <test>

            <param name="directory_in" value="testdir1.zip"/>

            <param name="directory_derived_in" value="testdir1.zip"/>

            <output name="directory_out">

                <assert_contents>

                    <has_size size="0"/>

                </assert_contents>

            </output>

            <output name="directory_derived_out">

                <assert_contents>

                    <has_size size="0"/>

                </assert_contents>

            </output>

            <assert_stdout>

                <has_line line="dir1" n="4"/>

                <has_line line="file1" n="4"/>

                <has_line line="file2" n="4"/>

            </assert_stdout>

        </test>

    </tests>

</tool>

 No newline at end of file

  <tool file="inheritance_simple.xml" />

  <tool file="boolean_conditional.xml" />

  <tool file="composite.xml" />

  <tool file="directory_datatype.xml" />

  <tool file="environment_variables.xml" />

  <tool file="environment_variables_inject.xml" />

  <tool file="code_file.xml" />