How to use babel-jest

babelizer.js

GitHub: pahan35/cra-bug-test-09-19

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...babelJestTransformer,
// otherwise we have some cache issues
createTransformer: undefined,
process: (src, filename, config, transformOptions) => {
  if (shouldBabelize(filename)) {
    return babelJestTransformer.process(
      src,
      filename,
      config,
      transformOptions,

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index.js

GitHub: cpcwood/jest-erb-transformer

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}


function processFile (fileContent, filePath, config) {
  let processedContent = String(erbTransformer(fileContent, filePath, config))
  if (config.babelConfig) {
    const babelTransformer = babelJest.default.createTransformer(config.babelConfig)
    const transformOptions = { config: process.cwd() }
    processedContent = babelTransformer.process(processedContent, filePath, transformOptions).code
  }
  return processedContent

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process.js

GitHub: vuejs/vue-jest

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  if (/^typescript$|tsx?$/.test(lang)) {
    return transformer || require('./transformers/typescript')(lang)
  } else if (/^coffee$|coffeescript$/.test(lang)) {
    return transformer || coffeescriptTransformer
  } else {
    return transformer || babelTransformer.createTransformer()
  }
}


function processScript(scriptPart, filePath, config) {

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