smart_trim-8.x-1.3/tests/modules/smart_trim_translation_test/smart_trim_translation_test.module

<?php

/**
 * @file
 * Primary module hooks for Smart Trim translation module.
 */

use Drupal\locale\SourceString;

/**
 * Helper method to create string translations.
 *
 * Via https://drupal.stackexchange.com/questions/214803/is-there-a-way-to-programmatically-add-translations-for-strings.
 *
 * @param string $source_string
 *   The string to be translated.
 * @param string $translated_string
 *   The translation of $source_string.
 * @param string $langcode
 *   The language of the translation.
 *
 * @throws \Drupal\locale\StringStorageException
 */
function smart_trim_translation_test_add_translation(string $source_string, string $translated_string, string $langcode): void {
  // Find the existing source string.
  /** @var Drupal\locale\StringDatabaseStorage $storage */
  $storage = \Drupal::service('locale.storage');
  $string = $storage->findString(['source' => $source_string]);
  if (is_null($string)) {
    $string = new SourceString();
    $string->setString($source_string);
    $string->setStorage($storage);
    $string->save();
  }
  // Create the translation. If it already exists, it will be replaced.
  $storage->createTranslation([
    'lid' => $string->lid,
    'language' => $langcode,
    'translation' => $translated_string,
  ])->save();
}