public function testImport()
{
$records = $this->porter->import($this->specification);
self::assertInstanceOf(PorterRecords::class, $records);
self::assertNotSame($this->specification, $records->getSpecification(), 'Specification was not cloned.');
self::assertSame('foo', $records->current());
/** @var ProviderRecords $previous */
self::assertInstanceOf(ProviderRecords::class, $previous = $records->getPreviousCollection());
self::assertNotSame($this->resource, $previous->getResource(), 'Resource was not cloned.');
}