tape nock setup - filters sensitive request body data and de-gzips responses

tape-nock-setup.js

const tape = require('tape')
const path = require('path')
const zlib = require('zlib')

const bodyFilters = [
  [
    /client_secret=[^\\<&"]+/g, 'client_secret=XXX'
  ]
]

const test = require('tape-nock')(tape, {
  fixtures: path.join(__dirname, '..', 'fixtures'),
  defaultTestOptions: {
    afterRecord: function (scopes) {
      // avoid exposing client secret in the fixtures
      let scopesString = JSON.stringify(scopes, null, 2)
      console.log('scopesString', scopesString)

      for (const bodyFilter of bodyFilters) {
        scopesString = scopesString.replace(bodyFilter[0], bodyFilter[1])
      }

      let newScopes = JSON.parse(scopesString)

      // decode gzipped bodies
      newScopes = newScopes.map(scope => {
        console.log('scope', scope)
        if (scope.rawHeaders.includes('gzip')) {
          const hexResponse = Buffer.from(scope.response[0], 'hex')

          scope.response = JSON.parse(zlib.gunzipSync(hexResponse).toString('utf8'))
          scope.rawHeaders = scope.rawHeaders.filter(h => h.toLowerCase() !== 'content-encoding' && h.toLowerCase() !== 'gzip')
        }

        return scope
      })
      return newScopes
    },
    after: function (scope) {
      // when running test, switch client secret to XXX to match fixtures

      for (const bodyFilter of bodyFilters) {
        scope.filteringRequestBody(bodyFilter[0], bodyFilter[1])
      }
      
       // can also add logic to handle scope.filteringRequestPath to get query params
    }
  }
})

module.exports = test