Syntax based validation example

test-without-server.js

// This is written in JS but the handler will still have TS support as expected

module.exports = (command) => {
  const { instance, commandName, commandObject } = command

  if (commandObject.testOnly !== true || instance.testServers.length) {
    return
  }

  throw new Error(
    `Command "${commandName}" is a test only command, but no test servers were specified.`
  )
}