public function testMerge()
{
$result = new OperationResult();
$result->reportEntity('FooEntity', 1, OperationResult::TYPE_ENTITY_CREATED);
$result->reportEntity('FooEntity', 2, OperationResult::TYPE_ENTITY_UPDATED);
$result->reportEntity('FooEntity', 3, OperationResult::TYPE_ENTITY_REMOVED);
$anotherResult = new OperationResult();
$anotherResult->reportEntity('BarEntity', 4, OperationResult::TYPE_ENTITY_CREATED);
$anotherResult->reportEntity('BarEntity', 5, OperationResult::TYPE_ENTITY_UPDATED);
$anotherResult->reportEntity('BarEntity', 6, OperationResult::TYPE_ENTITY_REMOVED);
$mergedResult = $result->merge($anotherResult);
$this->assertInstanceOf(OperationResult::clazz(), $mergedResult);
$this->assertEquals(2, count($mergedResult->getCreatedEntities()));
$this->assertEquals(2, count($mergedResult->getUpdatedEntities()));
$this->assertEquals(2, count($mergedResult->getRemovedEntities()));
// making sure that original ones were not touched
$this->assertEquals(3, count(array_merge($result->getCreatedEntities(), $result->getUpdatedEntities(), $result->getRemovedEntities())));
$this->assertEquals(3, count(array_merge($anotherResult->getCreatedEntities(), $anotherResult->getUpdatedEntities(), $anotherResult->getRemovedEntities())));
$this->assertTrue($result !== $mergedResult);
$this->assertTrue($anotherResult !== $mergedResult);
}
