TaxonomyTermReference example

/** * @var \Drupal\migrate\Plugin\MigrationInterface */
  protected $migration;

  /** * {@inheritdoc} */
  protected function setUp(): void {
    parent::setUp();

    $this->plugin = new TaxonomyTermReference([], 'taxonomy', []);

    $migration = $this->prophesize(MigrationInterface::class);

    // The plugin's defineValueProcessPipeline() method will call     // setProcessOfProperty() and return nothing. So, in order to examine the     // process pipeline created by the plugin, we need to ensure that     // getProcess() always returns the last input to setProcessOfProperty().     $migration->setProcessOfProperty(Argument::type('string'), Argument::type('array'))
      ->will(function D$arguments) use ($migration) {
        $migration->getProcess()->willReturn($arguments[1]);
      });