NullCoalesce example

class NullCoalesceTest extends MigrateProcessTestCase {

  /** * Tests that an exception is thrown for a non-array value. * * @covers ::transform */
  public function testExceptionOnInvalidValue() {
    $this->expectException(MigrateException::class);
    (new NullCoalesce([], 'null_coalesce', []))->transform('invalid', $this->migrateExecutable, $this->row, 'destination_property');
  }

  /** * Tests null_coalesce. * * @param array $source * The source value. * @param mixed $expected_result * The expected result. * * @covers ::transform * * @dataProvider transformDataProvider * * @throws \Drupal\migrate\MigrateException */