{
  "spec_dir": "spec",
  "spec_files": [
    "test/decode.js"
  ],
  "helpers": [
    "helpers/**/*.js"
  ]
}

{
  "spec_dir": "spec",
  "spec_files": [
    "test/*.js"
  ],
  "helpers": [
    "helpers/**/*.js"
  ]
}

Add all js files to test
Add all js files to test
