Function loadSnapshotSerializers

packages/vitest/src/runtime/setup-common.ts:71–102

(
  config: SerializedConfig,
  moduleRunner: PublicModuleRunner,
)

}

export async function loadSnapshotSerializers(
  config: SerializedConfig,
  moduleRunner: PublicModuleRunner,
): Promise<void> {
  const files = config.snapshotSerializers

  const snapshotSerializers = await Promise.all(
    files.map(async (file) => {
      const mo = await moduleRunner.import(file)
      if (!mo || typeof mo.default !== 'object' || mo.default === null) {
        throw new Error(
          `invalid snapshot serializer file ${file}. Must export a default object`,
        )
      }

      const config = mo.default
      if (
        typeof config.test !== 'function'
        || (typeof config.serialize !== 'function'
          && typeof config.print !== 'function')
      ) {
        throw new TypeError(
          `invalid snapshot serializer in ${file}. Must have a 'test' method along with either a 'serialize' or 'print' method.`,
        )
      }

      return config as SnapshotSerializer
    }),
  )

  snapshotSerializers.forEach(serializer => addSerializer(serializer))
}