class ImageFieldTest

class ImageFieldTest extends UnitTestCase {
    
    /**
     * @var \Drupal\migrate_drupal\Plugin\MigrateFieldInterface
     */
    protected $plugin;
    
    /**
     * @var \Drupal\migrate\Plugin\MigrationInterface
     */
    protected $migration;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        $this->plugin = new ImageField([], 'image', []);
        $migration = $this->prophesize(MigrationInterface::class);
        // The plugin's processFieldValues() method will call
        // mergeProcessOfProperty() 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 mergeProcessOfProperty().
        $migration->mergeProcessOfProperty(Argument::type('string'), Argument::type('array'))
            ->will(function ($arguments) use ($migration) {
            $migration->getProcess()
                ->willReturn($arguments[1]);
        });
        $this->migration = $migration->reveal();
    }
    
    /**
     * @covers ::processFieldValues
     * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
     */
    public function testProcessFieldValues() {
        $this->plugin
            ->processFieldValues($this->migration, 'somefieldname', []);
        $expected = [
            'plugin' => 'sub_process',
            'source' => 'somefieldname',
            'process' => [
                'target_id' => 'fid',
                'alt' => 'alt',
                'title' => 'title',
                'width' => 'width',
                'height' => 'height',
            ],
        ];
        $this->assertSame($expected, $this->migration
            ->getProcess());
    }

}