old_contents: require('proof/redux')(2, require('cadence')(prove))
  
  function prove (async, assert) {
      var argv = require('../level'), configuration = { levels: [] }
      async(function () {
          argv([{ configuration: configuration }, [ 'INFO', 'TRACE=bigeasy.example' ]], {}, async())
      }, function (result) {
          assert(result, { argv: [], terminal: false }, 'result')
          assert(configuration, {
              levels: [{
                  path: '', level: 'INFO'
              }, {
                  path: 'bigeasy.example', level: 'TRACE'
              }]
          }, 'configuration')
      })
  }
  
new_contents: require('proof/redux')(2, require('cadence')(prove))
  
  function prove (async, assert) {
      var argv = require('../level'), configuration = { levels: [] }
      async(function () {
          argv(['INFO', 'TRACE=example' ], {
              properties: { configuration: configuration }
          }, async())
      }, function (result) {
          assert(result, { argv: [], terminal: false }, 'result')
          assert(configuration, {
              levels: [{
                  path: '', level: 'INFO'
              }, {
                  path: 'example', level: 'TRACE'
              }]
          }, 'configuration')
      })
  }
  
subject: Fix level argument parser test.