How to use

params

function

in

ArrayExpression

FunctionDeclaration (functionNode) {
   for (const node of functionNode.params) {
    const line = node.loc.start.line
    const lineContent = lines[line - 1]

    let trimmed = false
    let start = lineContent.substr(0, node.loc.start.column)
    if (start.trim().endsWith(',')) {
     start = start.substr(0, start.lastIndexOf(','))
     trimmed = true
    }
    let end = lineContent.substr(node.loc.end.column)
    if (!trimmed && end.startsWith(',')) end = end.substr(1).trim()
    const mutantLineContent = start + end

    const mutantId = ++mutodeInstance.mutants
    const diff = lineDiff(lineContent, mutantLineContent)
    const log = `MUTANT ${mutantId}:\tRFDPM Line ${line}:\t${diff}`
    debug(log)
    mutodeInstance.mutantLog(`MUTANT ${mutantId}:\tRFDPM ${filePath} Line ${line}:\t\`${lineContent.trim()}\` > \`${mutantLineContent.trim()}'\``)
    const linesCopy = lines.slice()
    linesCopy[line - 1] = mutantLineContent
    const contentToWrite = linesCopy.join('\n')
    queue.push(mutantRunner({ mutodeInstance, filePath, contentToWrite, log }))
   }
  }