PHPUnit -setUp() - does it run before and after each test case? - phpunit

Question

I am still a bit confused with setup() in PHPUnit.
Does it run before and after each test case?
For intance, I want to clean up my article table before each test but I want to keep the test data that I already injected into the table. Because I only want to clean it until the next test.
My test,
namespace Test\Foo\Article;
use Test\SuiteTest;
use Foo\Article;
class ArticleTest extends SuiteTest
{
protected static $Article;
/**
* Call this template method before each test method is run.
*/
protected function setUp()
{
$this->truncateTables(
[
'article'
]
);
self::$Article = new Article(self::$PDO);
}
public function testFetchRow()
{
self::$Article->createRow(
[
':title' => 'Hello World',
':description' => 'Hello World',
':content' => 'Hello World'
]
);
$result = self::$Article->fetchRow(
[
':article_id' => self::$PDO->fetchLastInsertId()
]
);
$this->assertArrayHasKey('article_id', $result);
$expected = 12; // 12 keys associate with values in the array
$this->assertEquals($expected, count($result));
}
}
I check my article table, there is no test data anymore, it seems that setup() has cleaned it up. Is it how it should work?
What about the tearDown() - does it mean to run after the each test case?

Answer 1

setUp() runs before every single test method, tearDown() runs after each test method.
PHPUnit Manual - Chapter 4 Fixures:
Before a test method is run, a template method called setUp() is invoked
...
Once the test method has finished running, whether it succeeded or failed, another template method called tearDown() is invoked
See https://phpunit.de/manual/current/en/fixtures.html