TypeError when converting a JMeter file with only a CSV Data Set config element

[robingustafsson]

When trying to convert the following JMX:

<?xml version="1.0" encoding="UTF-8"?>
<jmeterTestPlan version="1.2" properties="5.0" jmeter="5.0 r1840935">
  <hashTree>
    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="Test Plan" enabled="true">
      <stringProp name="TestPlan.comments"></stringProp>
      <boolProp name="TestPlan.functional_mode">false</boolProp>
      <boolProp name="TestPlan.tearDown_on_shutdown">true</boolProp>
      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>
      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>
      <stringProp name="TestPlan.user_define_classpath"></stringProp>
    </TestPlan>
    <hashTree>
      <CSVDataSet guiclass="TestBeanGUI" testclass="CSVDataSet" testname="CSV Data Set Config" enabled="true">
        <stringProp name="delimiter">,</stringProp>
        <stringProp name="fileEncoding">UTF-8</stringProp>
        <stringProp name="filename">/Users/robin/Projects/loadimpact/jmeter-to-k6/example/file.csv</stringProp>
        <boolProp name="ignoreFirstLine">false</boolProp>
        <boolProp name="quotedData">false</boolProp>
        <boolProp name="recycle">true</boolProp>
        <stringProp name="shareMode">shareMode.all</stringProp>
        <boolProp name="stopThread">false</boolProp>
        <stringProp name="variableNames"></stringProp>
      </CSVDataSet>
      <hashTree/>
    </hashTree>
  </hashTree>
</jmeterTestPlan>

I get this:

/<path-to-repo>/src/strip.js:2
  const start = string.search(/[^\n]/)
                       ^
TypeError: Cannot read property 'search' of undefined
    at strip (/<path-to-repo>/src/strip.js:2:24)
    at renderLogic (/<path-to-repo>/src/render.js:207:5)
    at render (/<path-to-repo>/src/render.js:26:5)
    at convert (/<path-to-repo>/src/convert.js:5:10)
    at Object.<anonymous> (/<path-to-repo>/bin/jmeter-to-k6.js:39:20)
    at Module._compile (internal/modules/cjs/loader.js:722:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:733:10)
    at Module.load (internal/modules/cjs/loader.js:620:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:560:12)
    at Function.Module._load (internal/modules/cjs/loader.js:552:3)