react-code-dataset / next.js /test /lib /amp-test-utils.js

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/* eslint-env jest */
import AmpHtmlValidator from 'next/dist/compiled/amphtml-validator'

export async function validateAMP(/** @type {string} */ html) {
  const validatorPath = getBundledAmpValidatorFilepath()
  const validator = await getAmpValidatorInstance(validatorPath)
  const result = validator.validateString(html)
  const errors = result.errors.filter((error) => {
    if (error.severity === 'ERROR') {
      // Unclear yet if these actually prevent the page from being indexed by the AMP cache.
      // These are coming from React so all we can do is ignore them for now.

      // <link rel="expect" blocking="render" />
      // https://github.com/ampproject/amphtml/issues/40279
      if (
        error.code === 'DISALLOWED_ATTR' &&
        error.params[0] === 'blocking' &&
        error.params[1] === 'link'
      ) {
        return false
      }
      // <template> without type
      // https://github.com/ampproject/amphtml/issues/40280
      if (
        error.code === 'MANDATORY_ATTR_MISSING' &&
        error.params[0] === 'type' &&
        error.params[1] === 'template'
      ) {
        return false
      }
      // <template> without type
      // https://github.com/ampproject/amphtml/issues/40280
      if (
        error.code === 'MISSING_REQUIRED_EXTENSION' &&
        error.params[0] === 'template' &&
        error.params[1] === 'amp-mustache'
      ) {
        return false
      }
      return true
    }
    return false
  })
  const warnings = result.errors.filter((error) => {
    return error.severity !== 'ERROR'
  })

  expect({ errors, warnings }).toEqual({
    errors: [],
    warnings: [],
  })
}

/** @typedef {import('next/dist/compiled/amphtml-validator').Validator} Validator */

/** @type {Map<string | undefined, Promise<Validator>>} */
const instancePromises = new Map()

/**
 * This is a workaround for issues with concurrent `AmpHtmlValidator.getInstance()` calls,
 * duplicated from 'packages/next/src/export/helpers/get-amp-html-validator.ts'.
 * see original code for explanation.
 *
 * @returns {Promise<Validator>}
 * */
function getAmpValidatorInstance(
  /** @type {string | undefined} */ validatorPath
) {
  let promise = instancePromises.get(validatorPath)
  if (!promise) {
    // NOTE: if `validatorPath` is undefined, `AmpHtmlValidator` will load the code from its default URL
    promise = AmpHtmlValidator.getInstance(validatorPath)
    instancePromises.set(validatorPath, promise)
  }
  return promise
}

/**
 * Use the same validator that we use for builds.
 * This avoids trying to load one from the network, which can cause random test flakiness.
 * (duplicated from 'packages/next/src/export/helpers/get-amp-html-validator.ts')
 */
function getBundledAmpValidatorFilepath() {
  return require.resolve(
    'next/dist/compiled/amphtml-validator/validator_wasm.js'
  )
}

	/* eslint-env jest */
	import AmpHtmlValidator from 'next/dist/compiled/amphtml-validator'

	export async function validateAMP(/** @type {string} */ html) {
	const validatorPath = getBundledAmpValidatorFilepath()
	const validator = await getAmpValidatorInstance(validatorPath)
	const result = validator.validateString(html)
	const errors = result.errors.filter((error) => {
	if (error.severity === 'ERROR') {
	// Unclear yet if these actually prevent the page from being indexed by the AMP cache.
	// These are coming from React so all we can do is ignore them for now.

	// <link rel="expect" blocking="render" />
	// https://github.com/ampproject/amphtml/issues/40279
	if (
	error.code === 'DISALLOWED_ATTR' &&
	error.params[0] === 'blocking' &&
	error.params[1] === 'link'
	) {
	return false
	}
	// <template> without type
	// https://github.com/ampproject/amphtml/issues/40280
	if (
	error.code === 'MANDATORY_ATTR_MISSING' &&
	error.params[0] === 'type' &&
	error.params[1] === 'template'
	) {
	return false
	}
	// <template> without type
	// https://github.com/ampproject/amphtml/issues/40280
	if (
	error.code === 'MISSING_REQUIRED_EXTENSION' &&
	error.params[0] === 'template' &&
	error.params[1] === 'amp-mustache'
	) {
	return false
	}
	return true
	}
	return false
	})
	const warnings = result.errors.filter((error) => {
	return error.severity !== 'ERROR'
	})

	expect({ errors, warnings }).toEqual({
	errors: [],
	warnings: [],
	})
	}

	/** @typedef {import('next/dist/compiled/amphtml-validator').Validator} Validator */

	/** @type {Map<string \| undefined, Promise<Validator>>} */
	const instancePromises = new Map()

	/**
	* This is a workaround for issues with concurrent `AmpHtmlValidator.getInstance()` calls,
	* duplicated from 'packages/next/src/export/helpers/get-amp-html-validator.ts'.
	* see original code for explanation.
	*
	* @returns {Promise<Validator>}
	* */
	function getAmpValidatorInstance(
	/** @type {string \| undefined} */ validatorPath
	) {
	let promise = instancePromises.get(validatorPath)
	if (!promise) {
	// NOTE: if `validatorPath` is undefined, `AmpHtmlValidator` will load the code from its default URL
	promise = AmpHtmlValidator.getInstance(validatorPath)
	instancePromises.set(validatorPath, promise)
	}
	return promise
	}

	/**
	* Use the same validator that we use for builds.
	* This avoids trying to load one from the network, which can cause random test flakiness.
	* (duplicated from 'packages/next/src/export/helpers/get-amp-html-validator.ts')
	*/
	function getBundledAmpValidatorFilepath() {
	return require.resolve(
	'next/dist/compiled/amphtml-validator/validator_wasm.js'
	)
	}