Function buildTestEnvironments

test/cache-interceptor/cache-tests.mjs:248–278

* @param {number} idx * @param {TestEnvironment[][]} testOptions * @returns {TestEnvironment[]}

(idx, testOptions)

 * @returns {TestEnvironment[]}
 */
function buildTestEnvironments (idx, testOptions) {
  let baseEnvironments = testOptions[idx]

  if (idx === 0) {
    // We're at the beginning
    baseEnvironments = baseEnvironments.map(
      environment => joinEnvironments(BASE_TEST_ENVIRONMENT, environment))
  }

  if (idx + 1 >= testOptions.length) {
    // We're at the end, nothing more to make a matrix out of
    return baseEnvironments
  }

  /**
   * @type {TestEnvironment[]}
   */
  const environments = []

  // Get all of the environments below us
  const subEnvironments = buildTestEnvironments(idx + 1, testOptions)

  for (const baseEnvironment of baseEnvironments) {
    const combinedEnvironments = subEnvironments.map(
      subEnvironment => joinEnvironments(baseEnvironment, subEnvironment))

    environments.push(...combinedEnvironments)
  }

  return environments
}

/**
 * @param {Array<() => Promise<WorkerResult>>} jobs