I am going through a Laracast tutorial which suggest me to have the statement use DatabaseTransactions; inside my test class definition, to allow the data changes in my test case will persists only for that case. I have a test class,
Class MyClassTest extends TestCase
{
// This use statement is responsible for
//all the data operations to persists only with in that test case
use DatabaseTransactions;
/**
* @test
*/
public function my_test_function()
{
// My test case code. Which inserts/updates
//data and assert statement.
}
}
The use DatabaseTransactions works in a way that the data changes in the method persists only with in that. How that works exactly?
As went further, DatabaseTransactions is trait, which contains the method beginDatabaseTransaction with @before annotation.
use DatabaseTransactions within the test class lets the class have that method.beginDatabaseTransaction contains a @before annotation, it will be executed before every test case.The below is the method definition which begins a transaction and rolls back existing transaction before the test case finishes(it is still unclear why @before should be called before the test case finishes).
@before
public function beginDatabaseTransaction() {
$this->app->make('db')->beginTransaction();
$this->beforeApplicationDestroyed(function () {
$this->app->make('db')->rollBack();
});
}