config.js

import {prettyDOM} from './pretty-dom'

// It would be cleaner for this to live inside './queries', but
// other parts of the code assume that all exports from
// './queries' are query functions.
let config = {
  testIdAttribute: 'data-testid',
  asyncUtilTimeout: 1000,
  // this is to support React's async `act` function.
  // forcing react-testing-library to wrap all async functions would've been
  // a total nightmare (consider wrapping every findBy* query and then also
  // updating `within` so those would be wrapped too. Total nightmare).
  // so we have this config option that's really only intended for
  // react-testing-library to use. For that reason, this feature will remain
  // undocumented.
  asyncWrapper: cb => cb(),
  // default value for the `hidden` option in `ByRole` queries
  defaultHidden: false,
  // showOriginalStackTrace flag to show the full error stack traces for async errors
  showOriginalStackTrace: false,

  // throw errors w/ suggestions for better queries. Opt in so off by default.
  throwSuggestions: false,

  // called when getBy* queries fail. (message, container) => Error
  getElementError(message, container) {
    const error = new Error(
      [message, prettyDOM(container)].filter(Boolean).join('\n\n'),
    )
    error.name = 'TestingLibraryElementError'
    return error
  },
  _disableExpensiveErrorDiagnostics: false,
}

export function runWithExpensiveErrorDiagnosticsDisabled(callback) {
  try {
    config._disableExpensiveErrorDiagnostics = true
    return callback()
  } finally {
    config._disableExpensiveErrorDiagnostics = false
  }
}

export function configure(newConfig) {
  if (typeof newConfig === 'function') {
    // Pass the existing config out to the provided function
    // and accept a delta in return
    newConfig = newConfig(config)
  }

  // Merge the incoming config delta
  config = {
    ...config,
    ...newConfig,
  }
}

export function getConfig() {
  return config
}