galaxy/test/functional/tools/expression_null_handling_text.xml

<tool name="expression_null_handling_text" id="expression_null_handling_text"
	  version="0.1.0" tool_type="expression">
    <expression type="ecma5.1">
        {return {'text_out': $job.text_input};}
    </expression>
    <inputs>
        <param type="text" label="Text input." name="text_input" optional="true" />
    </inputs>
    <outputs>
        <output type="text" name="text_out" from="text_out" />
    </outputs>
    <tests>
        <test>
            <param name="text_input" value_json="&quot;foo bar&quot;" />
            <output name="text_out" value_json="&quot;foo bar&quot;" />
        </test>
        <test>
            <param name="text_input" value_json="&quot;null&quot;" />
            <output name="text_out" value_json="&quot;null&quot;" />
        </test>
        <!-- Bug with the following test on postgres.
        <test>
            <param name="text_input" value_json="&quot;&quot;" />
            <output name="text_out" value_json="&quot;&quot;" />
        </test>
        -->
        <test>
            <param name="text_input" value_json="null" />
            <output name="text_out" value_json="null" />
        </test>
    </tests>
</tool>